Tecto-geomorphic analysis of paleoseismic trenching sites on active strike-slip faults
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摘要:
探槽选址直接决定了古地震研究的质量,且理想探槽位置具有稀缺性。在收集82篇国内外走滑断裂古地震研究论文的基础上,分析了长序列古地震探槽选址和同震位移探槽选址的构造地貌共性特征。长序列古地震探槽一般布设在断塞塘、拉分盆地、小型湖盆、闸门脊汇水一侧及比较平缓的冲洪积扇或大型冲洪积扇末端等地貌位置。这些地貌位置的共同特征是位于连续的、较高沉积速率的沉积环境,且通常富集14C测年物质。在探槽选址的过程中,不仅要对现今沉积环境,也要对其古地理环境进行评价。然而以发掘古地震同震位移为目的的探槽选址则不同,成功的研究点往往较频繁发生侵蚀和下切事件,其中冲沟是最常见的地貌标志。探槽布设以垂直和平行探槽为主,采取逐次掘进或相间平行排列的方式开挖。由于理想探槽位置的稀缺性,所以在这些优质的探槽点一定要开展长期详细地深入研究,最大限度获得古地震事件的长序列,同时也要注意新技术和新方法的应用。
Abstract:Ideal trenching sites, which directly determine the quality of the paleoseismic research, are very rare. In this paper, based on 82 research papers of paleoseismic investigations published both in Chinese and English, the authors analyzed the common geomorphological characteristics of trenching sites that recorded long series of paleoearthquakes and coseismic slips. The sites with long paeloearthquake records are usually located at the sag pond, pull-apart basin, small closed basin, or upstream of a shutter ridge, a gentle fan or the toe of a large-drainage fan, which have common depositional environment with few or no depositional hiatuses, high rates of sedimentation, and abundant carbon dating materials. We should not only analyze the modern depositional environment but also its paleoenvironment during the choice of trenching sites. On the other hand, trenching sites for the purpose of recovering coseismic slips are often located at places where frequent incision events are recorded, such as channels, which provide offset piercing markers. In these studies, trenches are opened in an array with orientations both parallel and perpendicular to fault strike. Due to the fact that good trenching sites are rare, decade-long persistent efforts are usually invested at these sites for detailed studies, to uncover as many as possible the events back in time.
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Keywords:
- strike-slip faults /
- paleoearthquake /
- trenching site /
- high sedimentation rate /
- burial channel /
- coseismic slip
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台湾玉里地区属于欧亚板块的边缘,位于欧亚板块与菲律宾洋板块的接触带附近[1]。台湾东部变质岩带由太鲁阁带和玉里带组成,但二者变质程度和岩石组成存在很大差别,前者为高绿片岩-角闪岩相,后者主体为低绿片岩相与蓝闪石片岩等高压低温相。玉里带的锆石特征与同位素定年已有较长的研究历史,Jahn等[2]采用Rb-Sr法、K-Ar法等定年,对台湾东部进行构造运动期次划分,测得玉里带的角闪辉长岩等年龄为35~40Ma。Yui等[3]在玉里带取了3组样品,获得83~123Ma的最新碎屑锆石年龄,属于早白垩世-晚白垩世,认为玉里带是由不同年龄的地质体组成的构造混杂岩体。但野外调查表明,玉里带的主体部分属低绿片岩相,其中的泥质岩和玄武岩保留了较好的原岩面貌特征,与新生代的地质体没有明显差别;蓝闪片岩等高压低温变质岩呈孤岛状断续分布,与其围岩在成分、变质特征等方面存在显著差异。本次关注2个方面的问题:①玉里带的同位素年龄及时代;②玉里带的主体与高压低温相的蓝闪片岩的构造关系,即是否为“构造混杂岩”。本次在收集前人资料的基础上,有目的的进行了野外地质调查,从地质学、地球化学及同位素年代学方面进行调研,认为玉里带主体是陆源沉积岩-基性火山岩,属新生代沉积裂陷的海相火山沉积岩;高压低温变质岩可能属晚中生代高压低温变质带折返上侵的产物。
1. 地质概况
台湾东部位于欧亚板块东南缘与菲律宾海板块的聚合处,也属于西太平洋板块聚合带的一部分,以台东纵谷地壳对接带为界,西部属欧亚大陆板块,北东部为西太平洋板块,东南部属菲律宾海板块[1-3]。台湾东部变质岩带呈北北东向条带状,长250km,宽25km,北西部为太鲁阁带,南东部为玉里带(图 1)。玉里带是本次研究的重点,长230km,宽5km,1: 50万台湾省地质图[1]及野外考察的实际资料显示,玉里带岩体的岩性主体为变质砂岩与千枚岩,夹有以蛇绿岩、蓝闪片岩、含绿辉石的基性岩等为代表的高压低温变质岩;在南部还见有枕状玄武岩-硅质岩等。变质砂岩和千枚岩原岩为砂岩和页岩,属于深海环境的浊流沉积,由于部分变质砂岩层理较厚,夹薄层页岩,形成环境可能为浅海-三角洲环境。蓝闪片岩和含绿辉石的基性岩以孤岛状地块的形式分布于变质碎屑岩中,可能属深部(高压)向上折返至浅部的地块。事实上,玉里带是不同变质和不同环境岩石的组合体,甚至被作为构造混杂堆积[1]。野外观察发现,高压低温相的蓝闪片岩等分布呈线状,大部分地层还是正常的火山-陆源碎屑岩,地层基本有序。
图 1 台湾玉里地区地质简图(a)和构造位置图(b)(据参考文献[1]修改)1-第四纪;2-新近纪(N)板岩及硬页岩;3-古近纪(E)板岩、变质砂岩、基性火山岩;4-玉里层变砂岩、千枚状泥质岩夹基性火山岩、变玄武岩等;5-高压低温变质岩块(蓝闪片岩、石角闪片岩、含绿辉石的辉长岩);6-前古近纪长春组云母石英片岩、变粒岩等;7-大理岩;8-不整合、地质界线;9-断层;10-剖面及同位素年龄样Figure 1. Simplified geological map (a) and tectonic map (b) of Yuli belt, Taiwan寿丰-玉里的岩石组合基本一致,主体为变砂岩、千枚岩夹火山岩,间有高压低温的变质岩块(蓝闪片岩、含绿辉石的辉长岩等)。根据有限地质路线,一定程度上还保留有原岩物质分界,主要是砂岩-泥质岩及沉积岩与火山岩(绿片岩)间的界面。在寿丰一带(图 2-a、b),岩石组成为变砂岩、变泥质岩夹基性火山岩,夹有含斑点状的变粒岩(含火山碎屑的砂岩等),因后期构造的强烈作用,岩层发生强烈层内褶皱,形成近于水平的低缓角度的构造样式,但原岩的层状构造还可大致判断。玉里带南部的新武吕溪等地则为枕状玄武岩、绿片岩、千枚状泥岩、变质粉砂岩、硅质岩等,原岩基本特征还保留。
对玉里带的7件样品进行了全岩主量、微量元素分析,其中3件为锆石定年样品:D0020-3(寿丰)、D0023-2(光复)变质砂岩,D0029-2(新武吕溪)变质玄武岩。
2. 地球化学
玉里带全岩主量、微量元素分析样品共计7件,测试工作由福建省地质测试研究中心完成。主量元素分析采用传统的湿法化学方法,微量元素采用定量光谱分析,结果列于表 1。根据野外产状及岩性,原岩为火山岩的样品有D0029-1、D0029-2(变玄武岩)、D0021-2(蓝闪片岩)、D0023-1(蛇纹岩),变质砂岩有D0020-3、D0023-2、D0025-2。
表 1 玉里带岩石主量、微量和稀土元素分析数据Table 1. Analytical whole-rock data for Yuli Belt样号 D0020-3 D0021-2 D0023-1 D0023-2 D0025-2 D0029-1 D0029-2 样号 D0020-3 D0021-2 D0023-1 D0023-2 D0025-2 D0029-1 D0029-2 SiO2 76.71 52.58 44.51 76.67 67.17 48.84 50.17 Ce 55.94 74.21 5.52 58.29 75.05 9.61 8.27 TiO2 0.53 0.69 0.04 0.54 0.72 1.11 1.22 Pr 8.34 11.44 0.62 6.95 9.05 1.37 1.55 Al2O3 10.83 18.28 2.98 10.38 14.56 15.01 14.68 Nd 31.66 46 2.59 25.74 34 7.55 8.53 FeO 2.14 7 6.28 2.06 3.98 6.71 6.36 Sm 6.55 9.8 0.63 4.54 6.73 2.71 3.19 Fe2O3 1.6 3.71 2 0.64 1.79 2.09 2.62 Eu 1.59 2.58 0.12 1.02 1.47 1.01 1.16 MnO 0.068 0.184 0.003 0.092 0.145 0.066 0.082 Gd 5.45 9.74 0.69 3.64 5.56 3.4 4.11 MgO 1.36 3.89 32.23 1.28 2.24 9.16 8.13 Tb 0.73 1.52 0.12 0.48 0.86 0.66 0.76 CaO 0.29 4.5 0.14 1.21 1.31 9.73 9.57 Dy 2.87 7.3 0.7 1.66 3.81 3.57 4.23 N2O 1.43 1.31 0.11 2.18 0.55 2.98 3.4 Ho 0.51 1.69 0.18 0.3 0.82 0.88 1.03 K2O 2.04 3.24 0.1 2.23 3.2 0.16 0.13 Er 1.28 4.7 0.58 0.88 2.21 2.5 2.86 P2O5 0.07 0.18 0 0.09 0.15 0.07 0.08 Tm 0.16 0.68 0.09 0.09 0.31 0.36 0.43 烧失量 2.3 2.38 4.64 2.13 3.48 2.86 2.34 Yb 1.18 4.54 0.69 0.75 1.87 2.38 2.76 总量 99.64 99.6 98.89 99.67 99.66 99.62 99.56 Lu 0.18 0.63 0.11 0.12 0.24 0.3 0.35 Mo 0.33 0.11 0.11 0.16 0.86 0.1 0.14 Y 21.7 45.7 9 18.2 25 26 29.4 Sn 2.38 2.82 0.99 2.66 3 1.1 1.18 al 32.13 3.09 44.14 40.40 41.46 20.50 20.72 Ag 0.045 0.153 0.036 0.105 0.044 0.04 0.069 fm 43.54 96.35 35.12 27.68 39.32 48.42 46.64 Au 0.76 2.25 0.89 8.23 1.49 0.71 0.62 c 14.38 0.26 2.15 8.56 6.78 24.16 24.55 Co 12.79 74.42 112.9 9.2 13.81 39.79 45.98 alk 9.95 0.30 18.59 23.35 12.44 6.93 8.09 Ni 28.14 182.2 1890 28.57 28.08 133.9 98.93 c/fm 0.33 0.00 0.06 0.31 0.17 0.50 0.53 Zn 72.55 99.03 102.3 50.97 96.95 79.59 89.35 AR 1.50 1.14 2.23 1.29 1.34 Rb 90.56 131.8 7.16 78.39 142.1 7.65 5.73 SI 20.3 79.2 15.3 43.4 39.4 Sr 45.77 127 11.41 79.67 61 144.2 157.6 FL 50.3 60.0 78.5 24.4 26.9 Nb 4.71 4.98 0.74 11.03 14.77 1.09 0.91 A/CNK 1.32 5.48 1.27 0.66 0.63 Cd 0.351 0.212 0.167 0.218 0.178 0.236 0.289 σ 2.16 0.03 0.58 1.69 1.74 Ba 355.1 823.8 28.47 515.2 502.1 65.22 22.34 Na2O+K2O 4.55 0.21 4.41 3.14 3.53 Hf 4.95 4.67 0.48 8.24 6.04 2.15 2.84 K2O/Na2O 2.47 0.91 1.02 0.05 0.04 W 0.93 0.57 0.36 1.17 1.91 0.4 0.52 τ 24.59 71.75 15.19 10.84 9.25 Pb 19.2 9.78 4.1 20.27 14.89 6.36 5.04 LREE/HREE 5.17 3.52 1.99 5.90 5.08 1.62 1.56 Bi 0.19 0.06 0.04 0.18 0.27 0.09 0.11 ΣREE 142.10 193.14 12.03 127.93 166.14 24.87 25.58 Th 7.92 12.61 1.19 8.84 13.22 0.62 0.86 (La/Yb)N 23.11 7.76 2.65 30.02 15.28 0.79 0.75 U 0.96 1.85 0.23 0.56 1.7 0.13 0.15 δEu 0.79 0.80 0.55 0.74 0.71 1.02 0.98 Cr 50.1 93 1863.3 52.2 80.8 306.6 311.1 Rb/Sr 1.98 1.04 0.63 0.98 2.33 0.05 0.04 V 54.6 143.8 115.5 43.1 89.5 199.6 231.7 Th/U 8.25 6.82 5.17 15.79 7.78 4.77 5.73 Zr 182.7 130.7 14.3 292.2 198.6 67.3 73.7 Ba/Sr 7.76 6.49 2.50 6.47 8.23 0.45 0.14 La 38.02 49.11 2.55 31.39 39.84 2.62 2.88 注:δEu=EuN/(SmN×GdN)1/2;下角标N表示为球粒陨石标准化后值;al、fm、c、alk、c/fm为尼格里值;主量元素含量单位为%,微量和稀土元素含量为10-6 尼格里值的计算根据各氧化物在组成造岩矿物的作用和组合规律,分为4组:Al′=Al2O3、Fm′= FeO+2Fe2O3+MgO+MnO、C′=CaO、Alk′=Na2O+ K2O,它们的分子数比为4个主要尼格里值al、fm、c和alk。
据尼格里四面体图解(图 3-a),原岩为火成岩的有5件样品,D0021-3、D0023-1、D0023-2、D0029-1和D0029-2,SiO2含量主要为44.51% ~ 52.58%,属基性岩,但D0023-2达76.67%,为酸性火山岩。Al2O3含量为14.68% ~18.28%,蛇纹岩仅2.98%,玄武岩A/CNK<1,属铝不饱和的钙碱质岩石类型;铁锰镁钙含量变化较大,但总体较高,与岩石中富含铁镁质矿物相对应。碱质含量为3%~4%,总体含量较高,均属亚碱性系列。另外2件样品(D0020-3、D0025-2)均落在泥质沉积岩区内,属沉积岩,与野外观察认识一致。对岩石成分进行投影(图 3-b),5个原岩为火成岩的样品落在钙碱性区内,绿片岩、变玄武岩、蛇纹岩等均分布在B(玄武岩)区及附近[6],D0023-2落在流纹岩区。
微量元素的总体变化因元素组的不同而异,酸性岩中富集的W、Sn、Mo、Bi等因含量较低而变化小,Rb、Zr、Hf、U、Th及La含量明显较低,但变化较大,Rb为7×10-6~142×10-6,Zr为14×10-6~292×10-6;在基性岩或超基性岩中富集的Co、Ni、V等(亲铁元素)含量较高,变化大,Ni为28.14×10-6~1890×10-6;有关的Ba、Sr变化大,Ba为22×10-6~823× 10-6,Sr为11 × 10-6~157 × 10-6;SiO2及K2O与Rb、Zr、Hf、U、Th及La为正相关。微量元素蛛网图(图 4-a)曲线特征总体相似,Rb、U、Th、Pb形成峰值,Nb、Sr亏损而出现下凹的谷值。进一步细化可分出变质砂岩、玄武岩和蛇纹岩。前者分布于投影图的上部,具较高的微量元素,特别是Hf之前的元素丰值;中者分布于中间,基本是水平状曲线,没有出现Nd的富集,而明显区别于其他样品;蛇纹岩所有元素含量则均低,可能与蛇纹岩的成分有关。
图 4 原始地幔标准化微量元素蛛网图(a)及稀土元素配分模式(b)(原始地幔及球粒陨石标准化值据参考文献[7])Figure 4. Primitive-mantle-normalized trace elements patterns (a) and chondrite-normalized REE patterns (b)稀土元素总量为2.65×10-6~30.02×10-6,La为2.55×10-6~39.84×10-6,Ce为5.52×10-6~75.05×10-6,Eu为0.12 × 10-6~1.59 × 10-6,δEu=0.55~1.02,弱亏损-无亏损;(La/Yb)N值为0.75~30.02,变化很大。稀土元素配分曲线(图 4-b)总体呈平缓状,近于水平。进一步细分可发现,变质砂岩为左高、右低的斜线,枕状玄武岩则呈水平状,蛇纹岩Eu略亏损。各样品稀土元素含量的差别,还表现为配分曲线高度的差别,即各元素含量的同步差异,可能反映了幔源物质与壳源物质的比例不同。
3. 锆石样品特征
通过台湾同行介绍及野外实地观察,玉里带主要由变质粗碎屑岩、玄武岩、蛇绿岩、蓝闪片岩等组成。Yui等[4]在玉里带选取原岩为变质砂岩的样品进行碎屑锆石定年。本次力寻与地层同时形成的中-酸性火山岩夹层或侵入岩体进行锆石测年。测年样品D0020-3、D0023-2为含火山碎屑的砂岩,D0029-2为玄武岩-硅质岩组合中的玄武岩。
样品D0020-3采集自寿丰公路壁,露头连续,宽度200m,野外认为属变砂岩与千枚岩组合夹斑点状变粒岩(原岩可能为含火山碎屑的砂岩),变砂岩单层厚度可达0.8~1m,变余层状构造。
样品D0023-2采集自光复公路壁,露头连续,约300m,变砂岩与千枚岩组合夹斑点状变粒岩(可能属含火山碎屑的碎屑岩),岩石呈变余厚层状,单层厚度可达0.7m。
样品D0029-2采集自新武吕溪河床,露头连续,宽度300m,岩性为变枕状玄武岩、硅质岩条带等,绿帘透闪片岩-变枕状玄武岩。样品取自变玄武岩。
上述样品在露头尺度未见侵入岩等引起热事件的干扰物,岩石中的锆石可作为测试对象。样品已做多种测试,包括岩石薄片鉴定、硅酸盐全分析、稀土元素、微量元素、人工重砂等。
4. 锆石测试分析
4.1 锆石测试方法
锆石微量元素含量和U-Pb同位素定年利用LA-ICP-MS分析完成。激光剥蚀系统为Coherent公司的GeoLas Pro 193nm准分子激光器,等离子体质谱仪系统为Thermo iCAPQ。激光剥蚀过程中采用氦气为载气、氩气为补偿气以调节灵敏度,二者在进入ICP之前通过一个Y型接头混合。每个时间分辨分析数据包括约15s的空白信号和45s的样品信号。对分析数据的离线处理(包括对样品和空白信号的选择、仪器灵敏度漂移校正、元素含量及UTh-Pb同位素比值和年龄计算)采用软件ICPMSDataCal[8]完成。详细的仪器操作条件和数据处理方法同参考文献[9]。
锆石微区原位U-Pb定年及微量元素测试采用国际标准样品91500做外标,GJ-1、PL、TEM、QH做盲样测试,精确度在3%以内。微量元素外部标准Nist610、BHVO-2G、BIR-2G,采用Si作内标的方法进行定量计算[8]。
U-Pb同位素定年采用锆石标准GJ-1作外标进行同位素分馏校正,每分析5~10个样品点,分析2次GJ-1。对于与分析时间有关的U-Th-Pb同位素比值漂移,利用GJ-1的变化采用线性内插的方式进行了校正[8]。锆石样品的U-Pb年龄谐和图绘制和年龄加权平均值计算均采用Isoplot完成。
锆石通过精选制靶后,进行阴极发光(CL)图像和透射光、反射光照相。根据锆石阴极发光图像(图 5),所选锆石没有裂隙、包体等缺陷,符合测试要求。
根据锆石形态特征,将待测锆石分为3类:第1类为自形晶或尖棱角状,环带宽大而不发育,主要为D0020-3样品的36、223号测点;第2类为次棱角状-次圆状,环带相对发育,测得年龄为中生代-古生代的各测点;第3类为圆状或磨圆状的碎屑锆石,或环带不发育的变质锆石或环带发育的岩浆锆石,时代为元古宙-太古宙,属沉积源区的继承锆石[10-11]。
测点的布置目的性明确。在磨圆锆石中,主要选择锆石振荡环带,部分选择核部;对于未磨圆锆石主要选择在其边缘的振荡环带。锆石同位素测年工作在中国冶金地质总局山东局测试中心完成。
4.2 锆石同位素定年结果
3件样品共获得230组有效测年数据,其中D0020-3有136组,D0023-2有122组,D0029-2有26组。锆石U-Pb同位素分析结果和计算的表观年龄值见表 2。本次主要采用图解方法处理相关数据及求得年龄值。当年龄小于1000Ma时,采用锆石206Pb/238U表面年龄;当年龄大于等于1000Ma时,采用207Pb/206Pb表面年龄及其平均值。
表 2 锆石U-Th-Pb同位素分析数据和计算的年龄值Table 2. Analytical data of zircon U-Th-Pb isotopes and calculated age values测点号 总Pb/10-6 232Th/10-6 238U/10-6 Th/U 同位素比值 表面年龄/Ma 谐和度 207Pb/206Pb 1σ 207Pb/235Pb 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235Pb 1σ 206Pb/238U 1σ D0020-3-1 5.48 139.82 142.47 0.98 0.0561 0.0038 0.2039 0.0125 0.0269 0.0005 457.5 156.5 188.5 10.6 171.1 3.3 90% 2 24.74 33.24 62.31 0.53 0.1110 0.0023 4.6074 0.0910 0.3004 0.0038 1816.7 38.3 1750.6 16.5 1693.5 18.6 96% 3 3.53 37.84 65.73 0.58 0.0574 0.0035 0.3141 0.0173 0.0413 0.0008 509.3 135.2 277.4 13.4 261.0 5.0 93% 4 2.94 453.41 564.02 0.80 0.0551 0.0049 0.0267 0.0022 0.0039 0.0001 416.7 197.2 26.8 2.2 24.8 0.7 92% 5 108.04 125.31 268.75 0.47 0.1143 0.0017 4.9210 0.0816 0.3096 0.0031 1933.3 26.1 1805.9 14.0 1738.8 15.1 96% 6 96.13 43.67 233.52 0.19 0.1147 0.0018 5.4395 0.0955 0.3420 0.0043 1875.9 28.1 1891.1 15.1 1896.3 20.6 99% 7 60.92 62.08 82.85 0.75 0.1878 0.0028 13.3655 0.2470 0.5124 0.0063 2724.1 24.7 2705.8 17.5 2666.8 26.9 98% 8 1.85 45.92 38.48 1.19 0.0636 0.0067 0.2389 0.0176 0.0322 0.0009 727.8 256.5 217.6 14.5 204.4 5.4 93% 9 30.34 62.71 77.00 0.81 0.1039 0.0022 4.0349 0.0895 0.2805 0.0035 1694.8 72.4 1641.3 18.1 1594.1 17.6 97% 10 65.48 80.45 151.05 0.53 0.1149 0.0021 5.3408 0.1077 0.3350 0.0037 1877.5 33.0 1875.4 17.2 1862.8 17.6 99% 11 178.31 107.34 324.71 0.33 0.1652 0.0029 9.8715 0.1801 0.4312 0.0053 2509.6 29.6 2422.9 16.8 2311.2 23.9 95% 12 4.78 0.65 233.29 0.00 0.0515 0.0025 0.1396 0.0069 0.0199 0.0003 261.2 112.9 132.7 6.1 126.8 2.0 95% 13 40.24 65.11 60.40 1.08 0.1595 0.0027 9.7828 0.1774 0.4443 0.0051 2449.7 29.5 2414.5 16.7 2370.0 22.7 98% 14 6.67 76.60 130.00 0.59 0.0496 0.0023 0.2720 0.0118 0.0405 0.0006 176.0 107.4 244.3 9.4 255.8 3.7 95% 15 23.46 475.89 480.39 0.99 0.0521 0.0014 0.2521 0.0070 0.0350 0.0004 300.1 61.1 228.2 5.7 221.5 2.6 97% 16 8.19 12.68 21.47 0.59 0.1099 0.0032 4.5065 0.1390 0.2988 0.0049 1798.2 53.6 1732.2 25.6 1685.3 24.1 97% 17 33.28 83.70 189.35 0.44 0.0682 0.0015 1.3472 0.0286 0.1433 0.0016 875.9 46.3 866.3 12.4 863.5 9.2 99% 18 242.33 114.48 541.51 0.21 0.1378 0.0023 6.7895 0.1300 0.3546 0.0040 2199.7 29.0 2084.4 16.9 1956.6 18.8 93% 19 6.40 68.14 89.22 0.76 0.0573 0.0030 0.4240 0.0227 0.0540 0.0009 505.6 116.7 358.9 16.2 339.0 5.7 94% 20 74.14 34.80 177.75 0.20 0.1512 0.0035 7.0639 0.1946 0.3365 0.0064 2361.1 39.2 2119.5 24.5 1869.7 30.7 87% 21 11.70 156.47 273.53 0.57 0.0559 0.0019 0.2629 0.0093 0.0342 0.0006 450.0 75.9 237.0 7.5 217.0 3.5 91% 22 4.28 60.02 74.95 0.80 0.0594 0.0037 0.3442 0.0219 0.0426 0.0009 588.9 135.2 300.4 16.6 269.1 5.6 89% 23 68.13 93.70 107.90 0.87 0.1711 0.0033 10.2623 0.2030 0.4322 0.0060 2568.8 37.8 2458.7 18.3 2315.8 26.9 94% 24 36.00 86.85 190.08 0.46 0.0731 0.0019 1.5252 0.0401 0.1504 0.0020 1016.7 86.1 940.6 16.1 903.2 11.2 95% 25 6.88 200.50 302.50 0.66 0.0516 0.0026 0.1218 0.0058 0.0173 0.0003 333.4 119.4 116.7 5.3 110.8 1.8 94% 26 10.54 102.07 109.93 0.93 0.0541 0.0021 0.5275 0.0218 0.0709 0.0012 376.0 87.0 430.1 14.5 441.6 7.1 97% 27 13.45 58.59 114.57 0.51 0.0612 0.0020 0.7941 0.0253 0.0938 0.0012 655.6 73.1 593.5 14.3 578.0 7.3 97% 28 37.07 53.45 81.85 0.65 0.1204 0.0022 5.6077 0.1035 0.3364 0.0042 1962.0 32.7 1917.3 15.9 1869.4 20.0 97% 29 21.35 54.54 420.95 0.13 0.0517 0.0016 0.3187 0.0122 0.0443 0.0010 333.4 70.4 280.9 9.4 279.7 5.9 99% 30 104.92 44.45 272.70 0.16 0.1170 0.0022 5.1796 0.1009 0.3179 0.0038 1910.8 33.0 1849.3 16.6 1779.6 18.8 96% 31 113.48 161.47 174.48 0.93 0.1648 0.0029 10.1494 0.1954 0.4418 0.0052 2505.2 29.5 2448.5 17.8 2358.5 23.4 96% 32 36.92 265.67 207.46 1.28 0.0656 0.0015 1.0745 0.0272 0.1176 0.0016 792.3 50.0 740.9 13.3 716.7 9.2 96% 33 76.79 24.57 203.33 0.12 0.1134 0.0024 5.0156 0.1098 0.3168 0.0038 1854.6 37.8 1822.0 18.5 1774.3 18.7 97% 34 5.87 21.86 37.71 0.58 0.0623 0.0026 1.0273 0.0412 0.1213 0.0022 683.3 90.7 717.6 20.6 738.3 12.9 97% 35 9.55 141.76 176.26 0.80 0.0549 0.0022 0.3022 0.0125 0.0398 0.0006 405.6 86.1 268.1 9.7 251.3 3.9 93% 36 1.09 201.54 218.27 0.92 0.1031 0.0106 0.0436 0.0028 0.0038 0.0002 1679.9 190.7 43.3 2.8 24.5 1.0 44% 37 153.69 161.38 235.86 0.68 0.1666 0.0025 10.9695 0.1744 0.4708 0.0052 2523.8 25.8 2520.5 14.8 2487.2 22.7 98% 38 27.88 51.26 37.44 1.37 0.1653 0.0033 10.8612 0.2158 0.4717 0.0063 2510.8 33.6 2511.3 18.5 2490.9 27.6 99% 39 10.89 106.96 194.22 0.55 0.0542 0.0019 0.3367 0.0113 0.0449 0.0007 376.0 77.8 294.6 8.6 283.3 4.2 96% 40 6.82 92.61 116.40 0.80 0.0546 0.0031 0.3309 0.0187 0.0438 0.0008 398.2 127.8 290.3 14.3 276.2 4.8 95% 41 24.29 183.91 159.85 1.15 0.0671 0.0025 0.9391 0.0303 0.1008 0.0016 840.4 76.7 672.4 15.9 618.9 9.4 91% 42 9.28 108.71 147.24 0.74 0.0564 0.0025 0.3668 0.0146 0.0472 0.0007 477.8 98.1 317.2 10.8 297.2 4.3 93% 43 100.69 76.72 194.75 0.39 0.1389 0.0024 7.9025 0.1322 0.4072 0.0043 2213.3 30.1 2220.0 15.1 2202.3 19.7 99% 44 17.01 189.32 426.96 0.44 0.0511 0.0019 0.2311 0.0078 0.0326 0.0004 255.6 80.5 211.1 6.4 206.7 2.7 97% 45 5.81 64.56 159.04 0.41 0.0501 0.0024 0.2099 0.0101 0.0306 0.0006 198.2 114.8 193.5 8.5 194.1 3.7 99% 46 148.89 146.96 359.28 0.41 0.1124 0.0017 5.1860 0.0840 0.3303 0.0035 1838.9 28.1 1850.3 13.8 1839.6 16.8 99% 47 37.75 65.05 87.06 0.75 0.1108 0.0022 4.8964 0.1014 0.3173 0.0043 1813.0 35.5 1801.6 17.5 1776.6 21.0 98% 48 55.63 47.70 126.74 0.38 0.1167 0.0022 5.6122 0.1128 0.3449 0.0037 1905.9 33.8 1918.0 17.3 1910.0 18.0 99% 49 172.39 233.68 385.13 0.61 0.1103 0.0020 5.2549 0.0995 0.3415 0.0037 1805.6 32.3 1861.6 16.2 1893.8 17.7 98% 50 240.31 285.30 394.33 0.72 0.1483 0.0029 9.0477 0.2107 0.4367 0.0064 2325.6 34.7 2342.8 21.3 2336.0 28.5 99% 51 211.28 104.60 372.19 0.28 0.1688 0.0039 10.3628 0.2722 0.4381 0.0053 2546.0 38.6 2467.7 24.3 2342.2 23.7 94% 52 127.81 93.35 325.14 0.29 0.1126 0.0022 4.9957 0.1024 0.3183 0.0038 1842.6 36.1 1818.6 17.4 1781.6 18.4 97% 53 95.61 318.48 1018.98 0.31 0.0563 0.0011 0.6136 0.0121 0.0782 0.0008 461.2 42.6 485.9 7.6 485.6 4.7 99% 54 62.35 36.63 103.72 0.35 0.1632 0.0030 10.7079 0.2172 0.4710 0.0062 2500.0 31.0 2498.1 18.8 2487.7 27.2 99% 55 133.55 127.35 315.47 0.40 0.1168 0.0019 5.4751 0.0955 0.3363 0.0036 1909.3 29.6 1896.7 15.0 1868.7 17.4 98% 56 58.38 112.52 127.77 0.88 0.1143 0.0021 5.2266 0.1033 0.3280 0.0040 1868.8 32.9 1857.0 16.8 1828.5 19.4 98% 57 73.17 30.94 123.22 0.25 0.1665 0.0028 10.8246 0.2047 0.4655 0.0054 2524.1 28.7 2508.2 17.6 2463.8 23.9 98% 58 15.96 164.96 402.06 0.41 0.0526 0.0016 0.2403 0.0070 0.0331 0.0005 309.3 66.7 218.7 5.7 209.9 3.0 95% 60 289.89 333.94 678.31 0.49 0.1424 0.0029 6.3500 0.1389 0.3190 0.0045 2257.4 35.8 2025.4 19.2 1784.8 22.2 87% 61 10.18 164.17 146.61 1.12 0.0577 0.0031 0.3603 0.0171 0.0461 0.0008 520.4 116.7 312.5 12.7 290.4 5.1 92% 62 19.09 555.52 397.78 1.40 0.0498 0.0029 0.2064 0.0111 0.0300 0.0006 183.4 139.8 190.5 9.4 190.5 3.5 99% 63 13.65 71.89 157.92 0.46 0.0553 0.0018 0.5392 0.0176 0.0706 0.0011 433.4 72.2 437.9 11.6 439.9 6.5 99% 64 112.49 207.11 245.66 0.84 0.1136 0.0020 5.0859 0.0947 0.3215 0.0038 1857.7 37.5 1833.7 15.8 1797.2 18.4 97% 65 62.81 102.04 90.13 1.13 0.1651 0.0031 10.4882 0.2091 0.4562 0.0060 2509.0 32.1 2478.9 18.5 2423.0 26.5 97% 66 17.66 33.56 41.85 0.80 0.1086 0.0027 4.6768 0.1199 0.3116 0.0050 1776.9 44.6 1763.1 21.4 1748.7 24.5 99% 67 85.30 72.38 235.82 0.31 0.1139 0.0022 4.5810 0.0930 0.2888 0.0032 1862.7 35.0 1745.8 16.9 1635.5 16.0 93% 68 10.25 7.21 267.81 0.03 0.0521 0.0019 0.2573 0.0095 0.0360 0.0006 300.1 83.3 232.5 7.7 227.9 3.6 98% 69 40.63 56.46 72.45 0.78 0.1428 0.0032 8.5376 0.2196 0.4320 0.0080 2261.4 32.9 2289.9 23.4 2314.7 35.8 98% 70 16.44 24.65 41.80 0.59 0.1111 0.0030 4.6283 0.1328 0.2998 0.0043 1817.6 48.6 1754.4 24.0 1690.1 21.1 96% 72 43.28 16.89 112.48 0.15 0.1134 0.0024 5.1379 0.1115 0.3263 0.0041 1854.0 37.8 1842.4 18.4 1820.5 20.1 98% 73 47.02 93.30 62.92 1.48 0.1613 0.0031 10.3245 0.2108 0.4607 0.0060 2468.8 32.9 2464.3 18.9 2442.5 26.4 99% 74 30.92 264.41 851.92 0.31 0.0478 0.0012 0.2022 0.0048 0.0305 0.0004 87.1 57.4 187.0 4.0 193.5 2.2 96% 75 187.24 235.79 404.12 0.58 0.1251 0.0019 6.0311 0.0930 0.3455 0.0032 2031.5 25.8 1980.3 13.4 1913.1 15.2 96% 76 16.52 0.73 238.04 0.00 0.0559 0.0016 0.5111 0.0154 0.0657 0.0009 450.0 69.4 419.2 10.4 410.3 5.5 97% 77 15.27 131.87 175.38 0.75 0.0566 0.0020 0.5109 0.0177 0.0653 0.0010 476.0 77.8 419.1 11.9 407.8 6.1 97% 78 53.95 216.98 649.63 0.33 0.0556 0.0011 0.5387 0.0108 0.0695 0.0008 435.2 44.4 437.6 7.1 433.4 4.7 99% 79 8.28 68.59 102.75 0.67 0.0564 0.0027 0.4829 0.0244 0.0613 0.0010 477.8 103.7 400.1 16.7 383.3 6.4 95% 80 19.33 113.69 103.22 1.10 0.0687 0.0027 1.1959 0.0459 0.1251 0.0018 900.0 80.7 798.7 21.2 760.0 10.3 95% 81 59.40 122.04 127.08 0.96 0.1162 0.0023 5.2734 0.1175 0.3238 0.0044 1899.1 40.9 1864.6 19.0 1808.4 21.5 96% 82 149.01 930.75 895.31 1.04 0.0664 0.0012 1.0623 0.0194 0.1146 0.0012 816.7 33.2 735.0 9.5 699.4 6.9 95% 83 36.15 53.25 86.70 0.61 0.1076 0.0023 4.8344 0.1084 0.3236 0.0048 1758.3 40.0 1790.9 18.9 1807.5 23.2 99% 84 2.90 34.35 54.49 0.63 0.0584 0.0038 0.3273 0.0193 0.0422 0.0011 546.3 140.7 287.5 14.8 266.6 6.7 92% 85 21.05 328.23 631.94 0.52 0.0500 0.0014 0.1842 0.0047 0.0266 0.0003 194.5 64.8 171.7 4.1 169.2 1.9 98% 86 40.42 38.85 64.06 0.61 0.1645 0.0029 10.3786 0.1826 0.4547 0.0062 2502.2 29.3 2469.1 16.3 2416.1 27.4 97% 87 325.81 465.29 646.55 0.72 0.1828 0.0028 8.8332 0.1550 0.3454 0.0033 2679.6 24.8 2320.9 16.0 1912.8 16.0 80% 88 20.57 324.50 297.56 1.09 0.0518 0.0015 0.3493 0.0103 0.0485 0.0007 276.0 64.8 304.2 7.8 305.4 4.1 99% 89 162.83 91.57 411.34 0.22 0.1093 0.0020 4.9748 0.0942 0.3265 0.0036 1786.7 33.2 1815.0 16.0 1821.2 17.4 99% 90 6.80 92.84 158.25 0.59 0.0522 0.0022 0.2465 0.0106 0.0344 0.0006 300.1 96.3 223.7 8.7 218.1 3.7 97% 91 30.10 216.33 277.67 0.78 0.0550 0.0014 0.6089 0.0152 0.0801 0.0010 409.3 55.6 482.9 9.6 496.6 6.1 97% 92 7.93 6.40 11.04 0.58 0.1866 0.0058 13.2707 0.4220 0.5143 0.0095 2712.0 50.8 2699.1 30.0 2674.9 40.4 99% 93 13.89 95.08 78.06 1.22 0.0644 0.0021 1.0844 0.0385 0.1220 0.0022 755.3 66.7 745.8 18.8 741.9 12.9 99% 94 123.32 75.68 225.12 0.34 0.1496 0.0025 8.8830 0.1748 0.4250 0.0052 2342.6 28.7 2326.1 18.0 2283.3 23.5 98% 95 11.35 21.10 30.68 0.69 0.1061 0.0038 3.9747 0.1454 0.2707 0.0048 1800.0 65.9 1629.0 29.7 1544.3 24.6 94% 96 156.28 112.88 259.54 0.43 0.1603 0.0027 9.6790 0.1783 0.4327 0.0052 2458.9 27.9 2404.7 17.0 2317.7 23.4 96% 97 196.52 181.05 458.44 0.39 0.1111 0.0019 5.1262 0.0973 0.3308 0.0042 1817.6 31.5 1840.5 16.1 1842.5 20.4 99% 98 4.80 79.92 105.06 0.76 0.0477 0.0026 0.2124 0.0113 0.0331 0.0006 83.4 125.9 195.6 9.5 210.2 3.9 92% 99 19.92 20.31 45.97 0.44 0.1131 0.0030 5.0695 0.1296 0.3232 0.0048 1850.0 42.4 1831.0 21.7 1805.5 23.3 98% 100 4.54 92.87 88.83 1.05 0.0484 0.0027 0.2250 0.0139 0.0335 0.0007 120.5 135.2 206.1 11.5 212.4 4.1 96% 101 12.16 25.85 73.07 0.35 0.0680 0.0025 1.2121 0.0418 0.1297 0.0023 877.8 76.7 806.2 19.2 786.1 12.9 97% 103 77.82 30.77 124.54 0.25 0.1630 0.0033 10.5723 0.2125 0.4650 0.0055 2487.3 33.8 2486.3 18.7 2461.6 24.1 99% 104 57.98 377.28 326.02 1.16 0.0640 0.0014 1.0378 0.0228 0.1162 0.0014 742.6 44.4 722.8 11.4 708.4 8.1 97% 105 8.36 121.06 161.83 0.75 0.0553 0.0025 0.2800 0.0124 0.0370 0.0006 433.4 101.8 250.7 9.8 234.3 3.6 93% 106 8.12 211.54 288.30 0.73 0.0526 0.0028 0.1440 0.0075 0.0200 0.0004 309.3 123.1 136.6 6.7 127.4 2.6 93% 108 18.33 264.86 481.36 0.55 0.0511 0.0016 0.2055 0.0062 0.0291 0.0004 255.6 75.0 189.7 5.2 184.8 2.5 97% 109 7.48 90.75 170.63 0.53 0.0502 0.0025 0.2324 0.0109 0.0338 0.0006 205.6 117.6 212.1 9.0 214.5 4.0 98% 110 113.10 248.37 146.13 1.70 0.1686 0.0030 10.3207 0.1941 0.4399 0.0053 2544.1 30.3 2464.0 17.4 2350.0 23.6 95% 201 2.36 369.17 481.66 0.77 0.0572 0.0052 0.0251 0.0019 0.0036 0.0001 498.2 200.0 25.2 1.9 23.3 0.7 92% 202 0.95 201.93 208.00 0.97 0.1447 0.0398 0.0404 0.0050 0.0032 0.0002 2284.3 486.0 40.2 4.9 20.6 1.1 35% 203 15.20 128.55 82.52 1.56 0.0655 0.0031 0.9853 0.0448 0.1086 0.0018 790.7 100.0 696.3 22.9 664.9 10.5 95% 204 1.53 16.66 26.63 0.63 0.1690 0.0308 0.6404 0.0710 0.0424 0.0022 2547.2 309.4 502.5 44.0 267.6 13.3 38% 205 9.23 21.74 23.04 0.94 0.1060 0.0053 4.0602 0.1698 0.2890 0.0066 1731.8 92.3 1646.3 34.1 1636.5 33.2 99% 206 12.19 287.70 341.39 0.84 0.0483 0.0021 0.1744 0.0075 0.0262 0.0004 122.3 100.0 163.2 6.4 166.8 2.6 97% 207 12.86 117.82 227.80 0.52 0.0507 0.0022 0.3134 0.0137 0.0450 0.0007 227.8 101.8 276.8 10.6 283.5 4.6 97% 208 5.49 179.49 225.28 0.80 0.0550 0.0040 0.1404 0.0104 0.0187 0.0005 413.0 162.9 133.4 9.3 119.4 2.9 88% 209 17.42 92.98 98.69 0.94 0.0646 0.0023 1.1522 0.0418 0.1288 0.0023 761.1 73.3 778.3 19.7 781.1 13.1 99% 210 0.78 155.78 157.07 0.99 0.1310 0.0172 0.0508 0.0060 0.0036 0.0002 2122.2 232.3 50.4 5.8 23.1 1.3 85% 211 1.31 191.48 260.81 0.73 0.0883 0.0131 0.0378 0.0032 0.0036 0.0001 1390.7 288.3 37.6 3.1 23.0 0.7 87% 212 4.42 58.31 91.75 0.64 0.0504 0.0041 0.2528 0.0174 0.0382 0.0011 213.0 188.9 228.9 14.1 241.6 6.6 94% 213 27.77 214.98 650.59 0.33 0.0483 0.0015 0.2447 0.0079 0.0363 0.0005 122.3 75.9 222.3 6.4 230.1 3.0 96% 214 5.54 165.62 220.51 0.75 0.0482 0.0027 0.1267 0.0071 0.0191 0.0004 109.4 125.9 121.1 6.4 122.0 2.5 99% 215 18.43 130.24 95.84 1.36 0.0655 0.0022 1.1845 0.0386 0.1312 0.0022 790.7 69.3 793.4 17.9 794.7 12.3 99% 216 5.25 98.88 100.36 0.99 0.0568 0.0052 0.2892 0.0235 0.0383 0.0008 483.4 171.3 257.9 18.5 242.2 4.8 93% 217 2.12 261.96 434.81 0.60 0.0624 0.0045 0.0318 0.0023 0.0038 0.0001 687.1 155.5 31.8 2.3 24.6 0.7 74% 218 9.64 275.22 180.43 1.53 0.0527 0.0022 0.2489 0.0099 0.0343 0.0006 316.7 96.3 225.7 8.1 217.4 3.5 96% 219 12.82 318.30 194.56 1.64 0.0519 0.0027 0.2943 0.0164 0.0405 0.0007 279.7 122.2 261.9 12.9 255.7 4.5 97% 220 2.41 81.68 89.88 0.91 0.0920 0.0130 0.2039 0.0207 0.0188 0.0007 1533.3 270.5 188.5 17.4 120.2 4.2 55% 221 6.93 56.25 43.81 1.28 0.0891 0.0057 1.1491 0.0685 0.0973 0.0028 1405.6 122.2 776.8 32.4 598.5 16.3 74% 222 2.47 24.24 48.60 0.50 0.0723 0.0082 0.3723 0.0366 0.0415 0.0013 994.4 233.3 321.4 27.1 262.2 8.0 79% 223 1.59 257.83 298.37 0.86 0.1377 0.0223 0.0533 0.0042 0.0038 0.0002 2198.5 284.1 52.7 4.0 24.4 1.2 86% 224 15.47 24.91 25.14 0.99 0.1697 0.0073 9.6326 0.3698 0.4160 0.0091 2554.6 72.2 2400.3 35.3 2242.1 41.3 93% 225 11.79 355.54 314.33 1.13 0.0531 0.0033 0.1912 0.0110 0.0261 0.0005 344.5 145.4 177.6 9.4 166.3 3.4 93% 226 1.97 42.42 74.59 0.57 0.0893 0.0086 0.2334 0.0208 0.0211 0.0009 1410.8 183.5 213.0 17.1 134.9 5.5 55% 227 25.18 226.31 116.57 1.94 0.0676 0.0028 1.1683 0.0434 0.1264 0.0021 857.4 86.0 785.9 20.3 767.2 12.2 97% 228 1.58 297.66 345.23 0.86 0.1021 0.0123 0.0392 0.0036 0.0034 0.0001 1662.0 224.4 39.0 3.6 21.7 0.8 82% 229 1.59 215.83 259.31 0.83 0.0537 0.0079 0.0299 0.0038 0.0047 0.0002 366.7 292.2 29.9 3.8 30.1 1.3 99% 230 1.04 157.11 232.32 0.68 0.0970 0.0121 0.0395 0.0043 0.0033 0.0002 1568.5 235.5 39.4 4.2 21.4 1.0 90% D0023-2-1 8.08 212.50 236.41 0.90 0.0511 0.0022 0.1667 0.0074 0.0236 0.0004 255.6 100.0 156.6 6.4 150.6 2.3 96% 2 118.64 139.32 244.60 0.57 0.1305 0.0023 6.2972 0.1123 0.3466 0.0034 2105.2 29.8 2018.1 15.6 1918.2 16.5 94% 3 19.46 13.35 50.76 0.26 0.1118 0.0031 4.8543 0.1313 0.3176 0.0063 1829.3 45.4 1794.4 22.8 1777.8 31.0 99% 4 103.25 128.43 177.10 0.73 0.1483 0.0026 8.2414 0.1583 0.3962 0.0044 2327.8 34.3 2257.9 17.4 2151.6 20.3 95% 5 26.37 432.37 568.62 0.76 0.0517 0.0016 0.2392 0.0069 0.0334 0.0005 333.4 70.4 217.7 5.7 211.5 3.1 97% 6 316.05 313.97 554.86 0.57 0.1523 0.0022 8.8423 0.1537 0.4154 0.0051 2371.9 25.8 2321.9 15.9 2239.7 23.4 96% 7 78.86 97.65 186.27 0.52 0.1109 0.0020 4.8617 0.0900 0.3138 0.0034 1813.9 32.7 1795.6 15.6 1759.5 16.6 97% 8 13.65 125.41 149.25 0.84 0.0554 0.0020 0.5023 0.0176 0.0654 0.0011 427.8 81.5 413.2 11.9 408.1 6.6 98% 9 47.69 715.50 370.35 1.93 0.0628 0.0022 0.6681 0.0250 0.0759 0.0012 701.9 72.2 519.6 15.2 471.7 7.2 90% 10 275.46 32.00 741.14 0.04 0.1373 0.0031 5.6006 0.1577 0.2885 0.0039 2194.4 39.2 1916.2 24.3 1633.9 19.5 84% 11 50.59 94.16 125.16 0.75 0.1095 0.0026 4.3519 0.1050 0.2838 0.0038 1791.7 44.3 1703.3 19.9 1610.3 19.1 94% 12 253.68 616.48 713.94 0.86 0.1109 0.0020 3.9144 0.0868 0.2526 0.0045 1813.9 33.0 1616.7 17.9 1451.6 23.2 89% 13 2.53 42.15 69.68 0.60 0.0477 0.0068 0.1851 0.0234 0.0289 0.0016 87.1 307.4 172.4 20.1 183.9 10.3 93% 14 15.13 244.17 299.88 0.81 0.0495 0.0020 0.2509 0.0103 0.0363 0.0006 172.3 94.4 227.3 8.4 230.2 3.5 98% 15 8.20 220.06 340.84 0.65 0.0469 0.0019 0.1178 0.0049 0.0181 0.0003 55.7 83.3 113.0 4.5 115.9 1.7 97% 16 24.46 34.74 58.83 0.59 0.1103 0.0023 4.8088 0.1105 0.3141 0.0045 1805.6 38.6 1786.4 19.3 1760.7 21.8 98% 17 2.13 20.37 54.73 0.37 0.0548 0.0048 0.2364 0.0202 0.0316 0.0008 405.6 196.3 215.5 16.6 200.6 4.9 92% 18 15.11 28.45 37.43 0.76 0.1108 0.0040 4.3558 0.1549 0.2846 0.0053 1813.3 65.6 1704.0 29.4 1614.6 26.8 94% 19 16.88 628.12 484.08 1.30 0.0492 0.0018 0.1546 0.0055 0.0229 0.0003 166.8 80.5 146.0 4.8 145.8 2.1 99% 20 31.06 155.59 187.11 0.83 0.0643 0.0019 1.0763 0.0325 0.1211 0.0018 750.0 63.0 741.8 15.9 737.0 10.6 99% 21 9.82 11.99 14.80 0.81 0.1721 0.0047 10.9867 0.3039 0.4675 0.0086 2588.9 50.8 2522.0 25.7 2472.7 37.9 98% 22 124.71 190.78 249.46 0.76 0.1440 0.0028 7.0955 0.1550 0.3541 0.0042 2276.2 33.6 2123.5 19.4 1954.0 19.8 91% 23 211.51 119.47 529.24 0.23 0.1211 0.0025 6.9237 0.7610 0.4053 0.0427 1973.2 37.3 2101.7 97.8 2193.3 195.8 95% 24 49.84 49.05 114.57 0.43 0.1234 0.0025 5.6670 0.1279 0.3303 0.0040 2005.3 36.9 1926.3 19.5 1839.7 19.3 95% 25 22.04 355.25 445.86 0.80 0.0505 0.0014 0.2515 0.0070 0.0360 0.0004 216.7 66.7 227.8 5.7 227.8 2.4 99% 26 15.52 630.90 519.36 1.21 0.0491 0.0019 0.1342 0.0051 0.0199 0.0003 150.1 94.4 127.8 4.6 126.8 1.9 99% 27 8.05 17.56 220.81 0.08 0.0460 0.0025 0.2038 0.0097 0.0324 0.0006 188.3 8.2 205.9 3.9 91% 28 35.84 485.75 336.90 1.44 0.0605 0.0016 0.5473 0.0149 0.0652 0.0007 633.4 57.4 443.2 9.8 407.0 4.4 91% 29 107.26 100.64 214.78 0.47 0.1375 0.0025 7.1624 0.1393 0.3730 0.0047 2195.4 31.5 2131.8 17.3 2043.7 21.9 95% 30 11.64 238.38 411.79 0.58 0.0563 0.0034 0.1597 0.0089 0.0209 0.0003 464.9 133.3 150.5 7.8 133.6 2.0 88% 31 125.78 171.33 243.75 0.70 0.1648 0.0038 8.2143 0.1824 0.3572 0.0065 2505.2 39.2 2254.9 20.1 1968.8 30.6 86% 32 117.68 138.16 278.03 0.50 0.1168 0.0021 5.1472 0.0975 0.3152 0.0037 1907.1 31.3 1843.9 16.1 1766.0 18.2 95% 33 35.15 267.64 1188.21 0.23 0.0491 0.0014 0.1702 0.0046 0.0249 0.0003 150.1 64.8 159.6 4.0 158.5 2.0 99% 34 48.16 150.14 305.82 0.49 0.0685 0.0015 1.1875 0.0271 0.1243 0.0017 883.3 44.4 794.8 12.6 755.0 9.5 94% 35 167.22 234.63 378.48 0.62 0.1118 0.0016 5.1848 0.0907 0.3313 0.0040 1828.7 26.2 1850.1 14.9 1844.9 19.3 99% 36 141.23 110.27 390.10 0.28 0.1167 0.0019 4.6562 0.0869 0.2861 0.0043 1906.5 29.0 1759.4 15.6 1621.9 21.8 91% 37 6.30 4.07 10.49 0.39 0.1689 0.0050 10.5357 0.3014 0.4580 0.0093 2547.2 48.6 2483.1 26.5 2430.6 41.0 97% 38 87.05 68.15 228.05 0.30 0.1148 0.0025 4.7531 0.0936 0.2970 0.0037 1876.2 38.9 1776.7 16.5 1676.2 18.3 94% 39 2.46 152.90 153.23 1.00 0.0595 0.0041 0.0863 0.0051 0.0113 0.0003 583.4 150.0 84.0 4.8 72.7 1.9 85% 40 458.84 128.72 137.10 0.94 0.5636 0.0379 95.8833 15.2989 0.8533 0.1191 4417.0 97.5 4643.9 161.7 3977.2 414.9 84% 41 67.39 62.26 184.79 0.34 0.1098 0.0021 4.4296 0.0921 0.2895 0.0038 1796.0 35.0 1717.9 17.2 1638.9 19.2 95% 42 105.26 95.56 281.98 0.34 0.1514 0.0031 5.5264 0.1811 0.2592 0.0066 2361.4 35.2 1904.7 28.2 1485.5 33.7 75% 43 197.37 147.43 491.51 0.30 0.1146 0.0019 5.0776 0.0902 0.3184 0.0039 1873.2 29.9 1832.4 15.1 1782.1 18.9 97% 44 19.17 206.27 492.24 0.42 0.0517 0.0014 0.2219 0.0061 0.0310 0.0004 333.4 63.0 203.5 5.1 196.8 2.5 96% 45 20.07 47.99 433.62 0.11 0.0518 0.0018 0.2847 0.0092 0.0399 0.0005 276.0 79.6 254.4 7.3 252.1 3.4 99% 46 6.04 42.64 92.45 0.46 0.0592 0.0029 0.4164 0.0216 0.0507 0.0010 576.0 107.4 353.4 15.5 319.1 6.3 89% 47 73.67 344.89 457.84 0.75 0.0661 0.0012 1.0942 0.0220 0.1192 0.0015 810.8 37.8 750.6 10.7 726.1 8.6 96% 48 9.58 120.26 164.59 0.73 0.0519 0.0021 0.3125 0.0124 0.0442 0.0008 283.4 92.6 276.1 9.6 279.0 4.7 98% 51 66.81 96.71 351.50 0.28 0.0719 0.0013 1.6270 0.0326 0.1624 0.0022 983.3 37.0 980.7 12.6 970.3 12.2 98% 52 31.05 1879.62 955.48 1.97 0.0482 0.0012 0.1277 0.0034 0.0191 0.0003 105.6 52.8 122.1 3.0 122.0 1.8 99% 53 202.84 170.17 701.53 0.24 0.1119 0.0015 3.7496 0.0665 0.2405 0.0035 1831.5 24.1 1582.0 14.2 1389.3 18.1 87% 54 206.89 222.63 590.17 0.38 0.1123 0.0017 5.1704 0.3158 0.3354 0.0212 1836.7 27.8 1847.7 52.0 1864.5 102.4 99% 55 5.74 109.24 164.43 0.66 0.0457 0.0020 0.1707 0.0081 0.0271 0.0005 160.0 7.0 172.1 3.0 92% 56 18.80 399.08 724.55 0.55 0.0488 0.0014 0.1392 0.0043 0.0206 0.0003 139.0 63.9 132.4 3.9 131.7 1.9 99% 57 22.96 229.07 436.62 0.52 0.0522 0.0018 0.3055 0.0117 0.0425 0.0010 300.1 77.8 270.7 9.1 268.2 6.1 99% 58 89.02 107.32 134.19 0.80 0.1580 0.0015 10.2643 0.1412 0.4668 0.0047 2434.3 15.0 2458.9 12.7 2469.4 20.6 99% 59 108.14 81.76 574.84 0.14 0.0787 0.0012 1.7151 0.0278 0.1569 0.0017 1164.8 25.0 1014.2 10.4 939.6 9.6 92% 60 320.26 93.90 852.82 0.11 0.1275 0.0011 5.4202 0.0964 0.3054 0.0042 2064.8 14.8 1888.1 15.3 1717.9 20.9 90% 61 62.38 244.15 375.81 0.65 0.0634 0.0009 1.0892 0.0164 0.1235 0.0012 724.1 28.5 748.1 8.0 750.8 6.8 99% 62 16.53 178.59 270.96 0.66 0.0518 0.0018 0.3209 0.0114 0.0446 0.0007 276.0 79.6 282.6 8.8 281.4 4.5 99% 63 466.61 108.59 1220.06 0.09 0.1682 0.0013 7.2001 0.1402 0.3068 0.0053 2539.2 13.0 2136.5 17.4 1724.8 26.0 78% 64 4.08 104.06 110.82 0.94 0.0541 0.0035 0.1825 0.0106 0.0259 0.0006 376.0 150.9 170.3 9.1 164.7 3.5 96% 65 31.15 174.99 192.36 0.91 0.0642 0.0016 0.9930 0.0236 0.1118 0.0011 746.3 51.8 700.2 12.0 683.1 6.6 97% 66 34.85 146.71 1199.72 0.12 0.0541 0.0012 0.1880 0.0045 0.0250 0.0003 372.3 56.5 174.9 3.9 159.2 2.1 90% 67 212.43 288.26 481.48 0.60 0.1311 0.0019 5.9028 0.0936 0.3228 0.0038 2112.7 25.8 1961.6 13.8 1803.4 18.3 91% 68 24.53 120.80 238.37 0.51 0.0587 0.0014 0.6537 0.0162 0.0801 0.0011 566.7 50.0 510.8 10.0 496.9 6.4 97% 69 3.65 71.19 64.41 1.11 0.0563 0.0036 0.2885 0.0178 0.0381 0.0010 464.9 140.7 257.4 14.0 241.2 6.4 93% 70 100.13 152.46 675.34 0.23 0.0680 0.0015 1.1852 0.0315 0.1250 0.0024 877.8 47.1 793.7 14.6 759.3 13.7 95% 71 228.39 115.12 662.70 0.17 0.1150 0.0022 4.5264 0.0890 0.2820 0.0034 1879.9 28.9 1735.8 16.4 1601.2 16.9 91% 72 13.88 106.60 72.17 1.48 0.0679 0.0031 1.0737 0.0468 0.1182 0.0031 864.8 100.2 740.6 22.9 720.1 17.7 97% 73 41.91 46.00 195.65 0.24 0.0744 0.0021 1.8225 0.0511 0.1763 0.0027 1050.9 58.5 1053.6 18.4 1046.5 15.0 99% 74 16.27 48.32 89.33 0.54 0.0675 0.0020 1.3402 0.0374 0.1448 0.0020 853.7 67.6 863.3 16.2 872.0 11.5 98% 75 96.45 292.32 220.74 1.32 0.1134 0.0021 4.3456 0.0854 0.2744 0.0032 1855.3 34.0 1702.1 16.2 1563.3 16.2 91% 76 106.63 21.05 333.05 0.06 0.1140 0.0017 4.2650 0.0662 0.2681 0.0026 1865.1 26.4 1686.6 12.8 1530.9 13.4 90% 77 185.66 213.74 321.06 0.67 0.1606 0.0024 9.2318 0.1433 0.4119 0.0042 2462.7 25.3 2361.3 14.2 2223.6 19.2 93% 78 8.81 40.07 76.33 0.52 0.0624 0.0037 0.7580 0.0420 0.0884 0.0019 688.6 121.3 572.9 24.2 545.8 11.3 95% 79 132.88 70.72 356.87 0.20 0.1135 0.0021 4.7320 0.0806 0.2993 0.0030 1857.4 33.3 1772.9 14.3 1687.9 15.1 95% 80 49.38 70.39 114.43 0.62 0.1174 0.0025 5.2116 0.1106 0.3184 0.0037 1917.0 37.8 1854.5 18.1 1781.9 18.3 96% 81 19.25 177.85 322.55 0.55 0.0579 0.0022 0.3655 0.0138 0.0453 0.0007 527.8 81.5 316.3 10.3 285.7 4.4 89% 82 114.25 248.61 316.93 0.78 0.1146 0.0021 4.1056 0.0790 0.2566 0.0031 1873.2 33.0 1655.4 15.7 1472.4 16.1 88% 83 2.36 12.93 47.65 0.27 0.0603 0.0045 0.3326 0.0237 0.0409 0.0011 613.0 162.9 291.6 18.1 258.5 6.6 87% 84 11.20 222.18 183.45 1.21 0.0526 0.0023 0.2871 0.0141 0.0390 0.0008 322.3 98.1 256.3 11.1 246.8 4.9 96% 85 13.81 284.69 401.55 0.71 0.0513 0.0021 0.1804 0.0065 0.0256 0.0004 253.8 89.8 168.4 5.6 162.9 2.4 96% 86 21.31 128.33 128.65 1.00 0.0612 0.0018 0.9614 0.0281 0.1128 0.0015 655.6 60.2 684.0 14.6 689.0 8.9 99% 87 81.13 135.37 141.66 0.96 0.1563 0.0027 8.1371 0.1359 0.3731 0.0049 2416.7 28.7 2246.4 15.1 2043.9 22.9 90% 88 17.71 152.42 195.84 0.78 0.0563 0.0019 0.5089 0.0162 0.0652 0.0009 464.9 106.5 417.7 10.9 407.3 5.6 97% 89 18.24 176.45 393.12 0.45 0.0488 0.0016 0.2465 0.0078 0.0363 0.0005 200.1 75.9 223.7 6.4 229.9 3.3 97% 90 368.22 88.55 71.00 1.25 0.2710 0.0394 102.9685 26.2764 1.0329 0.1800 3311.7 229.6 4715.5 262.3 4573.6 572.2 96% 91 23.69 36.07 246.82 0.15 0.0557 0.0017 0.6516 0.0193 0.0841 0.0012 442.6 66.7 509.5 11.9 520.5 6.9 97% 92 8.84 14.26 21.87 0.65 0.1093 0.0034 4.4287 0.1355 0.2949 0.0052 1788.6 62.0 1717.7 25.4 1666.1 26.0 96% 93 17.87 84.83 96.34 0.88 0.0710 0.0021 1.2797 0.0381 0.1297 0.0018 959.0 62.2 836.7 17.0 785.9 10.2 93% 94 59.57 154.31 189.28 0.82 0.1187 0.0020 4.0853 0.0972 0.2453 0.0042 1938.9 31.3 1651.4 19.4 1414.3 21.8 84% 95 133.77 91.52 379.35 0.24 0.1199 0.0020 4.5746 0.0852 0.2721 0.0030 1954.6 30.2 1744.6 15.5 1551.6 15.1 88% 96 14.13 162.06 227.45 0.71 0.0542 0.0017 0.3427 0.0108 0.0456 0.0007 388.9 72.2 299.2 8.2 287.5 4.0 96% 97 90.38 135.22 223.63 0.60 0.1081 0.0018 4.5040 0.0803 0.2981 0.0034 1768.5 29.6 1731.7 14.8 1681.9 16.7 97% 98 192.49 327.91 468.77 0.70 0.1100 0.0017 4.5509 0.0792 0.2960 0.0034 1799.1 28.9 1740.3 14.5 1671.2 16.7 95% 99 17.34 411.96 300.33 1.37 0.0539 0.0018 0.2714 0.0096 0.0361 0.0006 368.6 77.8 243.8 7.6 228.6 3.5 93% 100 12.83 22.23 19.59 1.13 0.1809 0.0064 10.0356 0.3238 0.4013 0.0091 2660.8 58.3 2438.1 29.8 2174.9 41.7 88% 201 9.12 230.00 583.76 0.39 0.0528 0.0030 0.0904 0.0048 0.0127 0.0002 320.4 134.2 87.9 4.5 81.4 1.6 92% 202 17.43 346.98 906.92 0.38 0.0485 0.0022 0.1016 0.0043 0.0153 0.0002 124.2 108.3 98.3 3.9 98.1 1.4 99% 203 3.54 63.45 185.48 0.34 0.0520 0.0053 0.1067 0.0095 0.0156 0.0005 283.4 233.3 103.0 8.8 99.9 2.9 96% 204 12.48 273.66 651.23 0.42 0.0476 0.0027 0.0995 0.0053 0.0154 0.0003 79.7 125.9 96.4 4.9 98.7 1.9 97% 205 16.84 591.17 804.04 0.74 0.0473 0.0022 0.1015 0.0044 0.0156 0.0002 64.9 103.7 98.2 4.1 100.0 1.5 98% 206 10.78 535.82 503.64 1.06 0.0483 0.0029 0.0976 0.0056 0.0147 0.0003 122.3 127.8 94.6 5.2 94.0 1.8 99% 207 8.74 195.88 439.81 0.45 0.0488 0.0036 0.1066 0.0074 0.0160 0.0004 200.1 101.8 102.9 6.8 102.4 2.2 99% 208 13.19 279.63 479.10 0.58 0.0493 0.0031 0.1403 0.0095 0.0206 0.0006 133.3 8.4 131.5 3.6 98% 209 11.20 327.15 560.40 0.58 0.0543 0.0029 0.1136 0.0056 0.0154 0.0003 383.4 122.2 109.3 5.1 98.5 1.9 89% 210 8.85 239.06 463.30 0.52 0.0510 0.0029 0.1051 0.0057 0.0151 0.0003 242.7 131.5 101.5 5.2 96.5 2.0 94% 211 12.56 382.93 649.84 0.59 0.0523 0.0030 0.1056 0.0055 0.0148 0.0003 298.2 134.2 101.9 5.1 94.6 1.7 92% 212 23.72 199.45 515.82 0.39 0.0515 0.0019 0.2715 0.0109 0.0378 0.0006 261.2 87.0 243.9 8.7 238.9 3.8 97% 213 9.42 267.84 477.71 0.56 0.0505 0.0028 0.1075 0.0057 0.0155 0.0003 220.4 127.8 103.7 5.2 99.2 2.2 95% 214 13.23 324.28 631.29 0.51 0.0541 0.0028 0.1213 0.0058 0.0164 0.0004 376.0 114.8 116.3 5.3 104.6 2.6 89% 215 11.74 661.30 589.59 1.12 0.0552 0.0031 0.1029 0.0054 0.0136 0.0003 416.7 119.4 99.5 5.0 87.3 1.8 86% 217 10.17 357.92 515.53 0.69 0.0555 0.0035 0.1146 0.0075 0.0148 0.0003 435.2 140.7 110.1 6.8 94.7 2.1 84% 218 10.07 281.73 525.63 0.54 0.0536 0.0033 0.1114 0.0066 0.0152 0.0004 353.8 138.9 107.2 6.0 97.2 2.4 90% 219 11.58 403.47 625.12 0.65 0.0528 0.0029 0.1024 0.0052 0.0142 0.0003 320.4 124.1 99.0 4.8 91.0 1.9 91% 220 15.33 431.95 760.15 0.57 0.0517 0.0029 0.1123 0.0061 0.0156 0.0003 272.3 125.9 108.1 5.5 99.6 1.8 91% 222 8.36 253.53 422.58 0.60 0.0496 0.0026 0.1057 0.0056 0.0154 0.0003 176.0 119.4 102.0 5.1 98.2 1.9 96% 223 9.66 281.75 519.40 0.54 0.0516 0.0025 0.1059 0.0053 0.0146 0.0003 333.4 112.9 102.2 4.8 93.2 1.8 90% 225 19.09 835.91 920.51 0.91 0.0488 0.0021 0.1017 0.0042 0.0151 0.0003 139.0 101.8 98.4 3.8 96.7 2.0 98% D0029-2-1 36.22 9.97 966.38 0.01 0.0505 0.0013 0.2696 0.0067 0.0383 0.0004 216.7 52.8 242.4 5.4 242.0 2.8 99% 2 294.57 195.29 501.81 0.39 0.1310 0.0022 6.1821 0.1027 0.3371 0.0033 2122.2 28.6 2001.9 14.6 1872.8 16.1 93% 3 704.99 1219.35 896.58 1.36 0.0937 0.0017 3.1037 0.0555 0.2368 0.0026 1502.2 1.1 1433.6 13.8 1370.1 13.8 95% 4 21.22 4.46 586.12 0.01 0.0508 0.0013 0.2580 0.0069 0.0365 0.0005 231.6 65.7 233.1 5.6 231.2 3.0 99% 5 191.89 57.37 519.36 0.11 0.1109 0.0019 4.4653 0.0869 0.2882 0.0039 1814.5 36.3 1724.6 16.2 1632.4 19.5 94% 6 123.76 83.62 241.97 0.35 0.1307 0.0032 5.3006 0.1413 0.2911 0.0052 2107.1 43.5 1869.0 22.8 1647.2 26.0 87% 7 199.17 176.14 248.49 0.71 0.1441 0.0030 6.9894 0.1475 0.3480 0.0050 2276.9 36.1 2110.1 18.8 1925.0 23.7 90% 8 493.32 93.77 1658.41 0.06 0.1095 0.0020 3.9241 0.1002 0.2562 0.0048 1791.1 33.0 1618.7 20.7 1470.2 24.8 90% 9 160.58 15.95 551.71 0.03 0.1087 0.0022 3.8571 0.0906 0.2544 0.0040 1777.5 37.3 1604.7 19.0 1461.2 20.5 90% 10 181.49 44.82 608.07 0.07 0.1105 0.0021 3.7362 0.0932 0.2428 0.0046 1809.3 35.3 1579.2 20.0 1401.1 23.9 88% 11 172.14 87.51 359.84 0.24 0.1255 0.0026 5.7203 0.1361 0.3272 0.0053 2035.5 36.9 1934.4 20.6 1824.8 25.6 94% 12 135.29 62.97 323.59 0.19 0.1096 0.0019 4.5782 0.0891 0.3002 0.0038 1794.4 31.9 1745.3 16.3 1692.4 19.1 96% 13 107.77 232.45 396.83 0.59 0.0825 0.0021 1.3359 0.0391 0.1155 0.0013 1257.4 49.5 861.5 17.0 704.8 7.8 79% 14 250.00 151.91 337.41 0.45 0.1509 0.0033 8.4632 0.1881 0.4099 0.0119 2366.7 37.0 2282.0 20.2 2214.5 54.3 96% 15 22.25 126.11 272.57 0.46 0.0533 0.0022 0.3292 0.0139 0.0447 0.0008 342.7 96.3 289.0 10.6 281.8 4.9 97% 16 601.57 1334.66 1467.50 0.91 0.0678 0.0011 1.5567 0.0288 0.1648 0.0019 864.8 35.2 953.2 11.5 983.6 10.5 96% 17 100.36 122.21 425.54 0.29 0.0661 0.0016 1.5211 0.0397 0.1654 0.0024 809.3 46.1 938.9 16.0 986.6 13.2 95% 18 76.40 474.68 1862.93 0.25 0.0565 0.0017 0.2255 0.0074 0.0292 0.0008 477.8 66.7 206.5 6.1 185.3 5.0 89% 19 201.42 278.61 679.33 0.41 0.0707 0.0014 1.7922 0.0407 0.1818 0.0024 950.0 42.6 1042.6 14.8 1076.8 13.1 96% 20 13.56 196.35 255.82 0.77 0.0494 0.0024 0.1613 0.0072 0.0242 0.0005 168.6 112.9 151.9 6.3 154.4 2.9 98% 21 72.86 18.39 1815.78 0.01 0.0562 0.0018 0.2810 0.0103 0.0358 0.0006 461.2 72.2 251.5 8.2 226.9 3.9 89% 22 17.24 137.68 219.15 0.63 0.0564 0.0022 0.2911 0.0117 0.0375 0.0007 477.8 88.9 259.4 9.2 237.6 4.6 91% 23 139.34 77.68 345.91 0.22 0.1135 0.0021 4.3173 0.0892 0.2733 0.0040 1857.4 39.4 1696.7 17.1 1557.7 20.2 91% 24 175.30 123.72 478.66 0.26 0.1082 0.0020 3.5916 0.0714 0.2380 0.0028 1768.8 1.4 1547.7 15.8 1376.5 14.4 88% 25 922.69 526.64 1201.78 0.44 0.1409 0.0027 8.1711 0.1684 0.4152 0.0047 2238.9 32.3 2250.1 18.7 2238.9 21.3 99% 26 99.48 154.42 401.86 0.38 0.0688 0.0016 1.3749 0.0326 0.1433 0.0017 894.4 43.5 878.3 14.0 863.5 9.8 98% 上述3件样品的测试数据在Isoplot软件上制成年龄谱图(图 6),年龄值堆积形成多个峰值。
D0020-3 206Pb/238U年龄谱(图 6-a)的年龄分布可分为5段,20.6~24.8Ma、37.6~52.5Ma、110.8~ 127.4Ma、149.2~305.4Ma、339~903Ma,形成4个比较有意义的峰值,分别为23.3Ma(MSWD=2.7,n=10)、124.2Ma(MSWD=1.9,n=5)、214.1Ma(MSWD=0.97,n=7)、289Ma(MSWD=2.3,n=4),分别属古近纪(渐新世)、早白垩世、晚三叠世和早二叠世。峰值23.3Ma意义最大,是所有样品中最小的年龄峰值,对应的范围为20.6~24.8Ma,10粒锆石特征类似,呈不规则状,边缘呈缺口状,环带较宽,Th/U值为0.6~1,属岩浆锆石,据形状属火山碎屑锆石。37.6~52.5Ma对应锆石较少,仅7个点,特征类似于前述23.3Ma的火山碎屑锆石,其Th/U值为0.5~1。124.2Ma、168.5Ma、289Ma对应的是棱角状或次棱角状的锆石,边缘常呈浑圆状,环带较发育,单一环带宽20~30μm,Th/U值为0.3~1,属岩浆锆石,可能来自于远程的岩浆源岩。400~940Ma测点分散,锆石呈次圆状,Th/U值为0.4~1.2,代表了源岩的岩浆锆石。D0020-3 207Pb/206Pb年龄谱(图 6-b)的年龄分为2段,1662~1911Ma及2198~2569Ma,峰值对应为1843Ma(MSWD=0.52,n=17)和2521Ma(MSWD= 0.40,n=12),分别为古元古代和新太古代,最大值为2724Ma,属新太古代。
D0023-2 206Pb/238U年龄谱(图 6-c)的年龄分布为3段,72.5~105Ma、122.1~288Ma、407~980Ma,峰值5个,即96.7Ma(MSWD=4.2,n=19)、130.6Ma (MSWD=2.3,n=4)、228.9Ma(MSWD=0.14,n=4)、283.7Ma(MSWD=0.8,n=6)、407.3Ma(MSWD= 0.01,n=3),分别属晚白垩世、早白垩世、晚三叠世、早二叠世和早泥盆世。其中96.7Ma的锆石呈自形晶,边缘平直,环带较宽,单一环带20μm,Th/U值为0.2~1,属岩浆锆石。其余锆石呈自形晶或棱角状或次棱角状,边缘常平直,但年龄值较大者则呈圆状,环带发育而呈细密状,单一环带宽10~20μm,Th/U值为1,属岩浆锆石,可能来自远程的岩浆锆石。407~980Ma测点分散,锆石多呈次圆状,Th/U值为0.3~1,代表了源岩的岩浆锆石。207Pb/206Pb年龄谱(图 6-d)年龄分布在1768~2588Ma之间,峰值有2个:1830Ma (MSWD=0.87,n=20)和2558Ma (MSWD=0.90,n=4),分别属古元古代和新太古代,最大值为4417Ma(冥古宙)。
D0029-2取样的目的是获得同期的岩浆锆石,但没有成功。该样品206Pb/238U年龄谱(图 6-e)的年龄分布在154.4~242Ma之间,最小值为154.4Ma,峰值为235Ma(MSWD=4.2,n=4),属晚三叠世。最小值154.4Ma(晚侏罗世)与前2个样品相比太大,并为单一锆石,故不作讨论。峰值235Ma的锆石具有圆状特征,内部环带宽而模糊,边缘具白边(20μm),Th/U值为0~0.77,判断锆石受到变质作用的改造。207Pb/206Pb年龄谱(图 6-f)分布范围较大,仅出现峰值1769Ma(MSWD=0.8,n=6点),属古元古代,对应的锆石为圆状锆石,边缘均发育白边(20μm),Th/U值为0.03~1.36,最大值为2367Ma (古元古代)。
5. 讨论
5.1 锆石年龄的地质意义
本次样品中出现了新生代、中生代、古生代、元古宙、太古宙的同位素年龄值(表 3)。
表 3 锆石U-Th-Pb同位素数据年龄值分布Table 3. Distribution of age values of zircon U-Th-Pb isotopes古近纪始新世末期(206Pb/238U,20.6~30.1Ma,平均值为23.3Ma),为所有样品中最小的年龄。对应的锆石具火山碎屑锆石特征,可能代表玉里带中与原岩沉积同时发生的火山作用的年龄,表明玉里带火山-沉积年龄可能为23.3Ma。
古近纪始新世(206Pb/238U,52.7~37.6Ma),锆石具火山碎屑特征,与埔里运动(35~40Ma)[1]相对应,与蓝闪石等高压变质作用[2]基本同时,代表了高压变质作用期间伴生的火山作用的时间。
早晚白垩世之交(103.7~94.6Ma),为太鲁阁带长春组的火山碎屑锆石年龄(103~93Ma,另文发表),也是本区蓝闪片岩等原岩的锆石特征与年龄,证实野外考察期间,多数专家认为蓝闪片岩等高压变质岩的原岩为长春组,即太鲁阁带的火山碎屑。
晚侏罗世锆石仅在D0023-2中见及,均为次棱角状,说明源区属晚侏罗世火成岩,在其他样品中没有出现,表明此物源分布局限。在福建沿海地区[11-14]出现强烈的构造-岩浆事件,形成规模巨大的晚侏罗世-早白垩世火山岩和侵入岩,时代为150~107Ma,以酸性岩为主,富含锆石。该时代的锆石在玉里带分布局限,说明本区不是构造岩浆作用的中心地带,或远离长乐-南澳断裂带最中心和最强烈的地带。晚三叠世锆石在3件样品中均有分布,说明此时物质源区发生了普遍的岩浆事件,华夏陆块出现了以闽西南陆表海闭合为特征的重要大地构造事件,并伴有岩浆事件。玉里带出现的同年龄段锆石均为次圆状,具有远程沉积特征。
古生代年龄主要分布在二叠纪、泥盆纪、志留纪,少量为石炭纪。其中,二叠纪在华夏陆块没有出现大规模的岩浆事件,主要出现以煤系地层为特征的海陆交互相等沉积作用,在永安龙岭岩体,代表华力西期构造岩浆事件,在玉里带中出现上述时代的岩浆锆石。泥盆纪最重要的构造事件是闽西南陆表海的开始,是一个沉积的开端,没有中酸性岩浆事件,在所有样品中没有晚泥盆世的锆石出现。加里东期是福建重要的构造-岩浆事件,其中志留纪在华夏陆块也是重要的构造挤压期,出现了宁化岩体等大型岩基[12],本区各样品普遍出现的锆石表明了此次构造的普遍性。
元古宙年龄分布广泛,新元古代、中元古代和古元古代均有分布,其中标志性的年龄为1800Ma。本区出现1769~1852Ma年龄,所测锆石均为圆状,属岩浆锆石和变质锆石继承性锆石,表明存在华夏陆块基底的强烈岩浆或变质事件。太古宙的锆石年龄基本为新太古代,出现的年龄为2500Ma,本次测得年龄为2506Ma和2544Ma,这与长乐-南澳断裂带的情况相同[9-10]。
上述表明,锆石年龄的地质意义十分丰富,锆石年代学数据反映了研究区太古宙-渐新世十分复杂的地质事件所产生的物质的多样性,也证明了加里东期、华力西期、印支期、燕山期和喜山期构造岩浆事件的存在。玉里带的形成主要为2期:早期为板块俯冲(高压变质作用),时代为古近纪始新世(37.6~52.7Ma);晚期为沉积-火山作用,时代为古近纪始新世末期(20.6~30.1Ma,平均值为23.3Ma)。
5.2 玉里带的形成时代
玉里带的形成时代存在争议。Jahn等[2]认为,蓝片岩等高压变质形成于35~40Ma,福建省地质调查研究院[1]认为,其形成于8~10Ma。本次研究获得了较完整的年龄信息。
台湾东部地区变质岩分为太鲁阁带和玉里带,均属欧亚陆块边缘的地质作用结果,其地幔属岩石圈地幔[15-16],构造属性应为欧亚大陆边缘。台湾东部地区在晚侏罗世-早白垩世主要为陆源碎屑岩-火山岩建造,本次碎屑锆石年龄为150~107Ma,太鲁阁带长春组的火山碎屑锆石年龄为93~103Ma,(另文发表)[3],其后为80~90Ma的南澳运动,表现为花岗岩侵入及区域变质作用,这是基于花岗岩锆石U-Pb定年出现80~90Ma的年龄而确定的热事件,后期的工作也证实该区间相对合理,是形成南澳片岩(太鲁阁带)的地质事件。
根据地质产状及岩石组合特征,玉里带由两部分组成,即浅变质的火山-沉积岩和高压低温变质岩。主要地质事件可能也有2次:①第一次构造事件在强力挤压条件下,形成了高压低温变质岩。高压低温变质岩的原岩基性岩与东澳绿片岩(93~ 103Ma)同时,则第一次构造事件是高压低温变质作用,发生在南澳花岗岩形成(约82Ma)之后。玉里带35~40Ma[1, 3, 17]的角闪石等Rb-Sr年龄,可能代表了玉里带的高压低温变质岩封闭年龄,即来自东部的快速挤压形成的变质带的年龄。本次锆石年龄中也出现了该期年龄(37.6~52.7Ma),可能高压低温的挤压作用有岩浆事件形成的锆石。②浅变质的火山-沉积岩,即陆源碎屑岩夹基性火山岩,玉里带普遍存在的变砂岩-泥质岩夹基性火山岩(绿片岩),其中的变砂岩的成分成熟度和结构成熟度均较高,砂岩中出现大量石英、圆状锆石等碎屑物,其中的基性火山岩(层)是沉积同期的火山作用的产物,还出现了远洋的火山岩-硅质岩组合。对玉里带进行综合分析,其陆源碎屑岩夹基性火山岩、远洋基性火山岩-硅质岩组合(枕状玄武岩等),十分复杂和混乱。如果将陆源碎屑岩夹基性火山岩的浅海相或三角洲沉积环境,与远洋-半远洋环境分解为陆盆的不同部分时,即边缘和中心时,就变成了一个完整的陆表海(李寄瑀,2015考察时的解说)。玉里带可能属渐新世(23.3Ma)的陆表海,则各种沉积-火山作用可得到合理的解释。这表明,玉里带的形成环境为浅海相或三角洲,至远洋-半远洋环境,即玉里带由曾经的玉里海挤压而来。这一点从地球化学特征,尤其是基性岩为钙性-钙碱性,印证了陆表海的观点。由于工作时间有限,观察内容太少,没有办法对此认识提供更多的证据,也没有对玉里海的封闭时间进行研究。笔者推测,上述地质体的形成时间可能为新生代,在挤压形成推覆构造[17]的过程中,高压低温变质岩以构造侵入(构造岩片折返)的形式侵入玉里海的火山-沉积岩中,定格了玉里带。本文同意Jahn等[2]认为的玉里带属南中国海的扩张所致的观点。
变质的对象(原岩)是太鲁阁带长春组,其火山碎屑锆石年龄为93~103Ma。玉里带有关的构造作用主要有3期:①35~40Ma为埔里运动[1],陆内微小板块俯冲形成高压变质带,这是基于花岗岩、角闪岩等Rb-Sr年龄(35~40Ma)划分出来的热事件,形成蓝片岩等高压变质作用,本次锆石测年结果(37.6~52.7Ma)基本与之重合,证明埔里运动为板块俯冲作用,并形成高压变质带;②20.6~30.1Ma的锆石也是火山碎屑锆石,可能为蓝闪片岩等高压变质带折返后产生的火山作用形成的锆石,是与南海扩张作用有关的构造-火山作用;③0~10Ma为菲律宾海板块向欧亚板块俯冲的区域变质作用,即玉里带绢云母等的形成阶段,该期在玉里带普遍且相对均匀[1-2]。
5.3 与华夏陆块构造事件对比
华夏陆块的核心位于福建省,其主要的构造热事件有吕梁期(2059~1714Ma)、晋宁期(1010~ 796Ma)、加里东期(450~395Ma)、华力西期-印支期(277~209Ma)、燕山期(早期为183~165Ma,中期为155~135Ma,晚期为130~80Ma)、喜马拉雅期(56Ma~至今)6个构造-岩浆期[11]。
本区出现的锆石年龄有新太古代,这种年龄在福建省少见,可能代表了基底年龄。元古宙的锆石年龄主要为1800Ma,相应的锆石年龄在3件样品中均有出现。晋宁期的3件样品也均有出现,主要分布在497~987Ma之间。加里东期分布在471~ 497Ma之间。华力西期-印支期(277~209Ma)本区碎屑锆石分布在251~286Ma之间。在整个燕山期(早期为183~165Ma,中期为155~135Ma,晚期为130~80Ma)均有分布。喜马拉雅期(56Ma~至今)主要为23.3Ma,为玉里带沉积-火山作用形成的年龄。玉里带的构造热事件与南海地区白云运动(23.8Ma)[18]的时代一致,空间相关联。需要说明的是,白云运动是南海渐新世-中新世重大的地质事件,主要是白云凹陷盆地的形成,在台湾玉里地区的构造热事件中,主要表现为沉积作用和火山作用。
从地球物理特征分析,重力特征图上本区基本表现出与华夏陆块一致的特征[19]。这从另一方面证实了台湾东部地区属于华夏陆块的一部分。
6. 结论
(1) 玉里带变质的原岩是太鲁阁带长春组,其火山碎屑锆石年龄为93~103Ma。
(2) 玉里带发生了2期事件:①35~40Ma的埔里运动,其火山碎屑锆石年龄为37.6~52.7Ma,证实了埔里运动与高压变质作用高度相关,并有火山作用;② 20.6~30.1Ma区间的火山碎屑锆石,可能是高压变质带折返后产生的火山作用的产物,与南海扩张作用有关的构造-火山作用基本一致(23.8Ma),即玉里带的岩石主体为沉积-基性火山岩组合,形成的年龄为23.3Ma,属渐新世。
(3) 玉里带形成的大地构造环境为欧亚陆块的边缘,与华夏陆块一致,属华夏陆块的一部分。
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图 1 不同变异系数的50个古地震事件分布图[8]
(变异系数越大,地震周期性越弱,灰色矩形框内平均为5次事件,其中系数越大,矩形框中的事件重复特征越不具有代表性)
Figure 1. Distribution of 50 earthquakes with different variant coefficients
图 4 高湾子探槽研究点LiDAR山影渲染图(位置见图 2-A)
Figure 4. LiDAR topography of the Gaowanzi site
图 5 Wallace Creek探槽开挖点位错冲沟分布(A)、上游探槽中8个埋藏冲沟分布简图(B)和埋藏冲沟分布(C)(每一种彩色符号代表探槽中解译的冲沟底线位置,字母为下游冲沟代号, 彩色符号是上下游可以对比的,黑色是跨断层不能对比的, 黑色实线表示断层[15-16])Fig. 5 Close-up aerial oblique photo of the Wallace Creek trench site(A),simplified map of the wall of an excavation upstream from the fault shows eight of the nine nested upstream channels(B),and map views of buried channels at site(C)
Figure 5. Close-up aerial oblique photo of the Wallace Creek trench site (A), simplified map of the wall of an excavation upstream from the fault shows eight of the nine nested upstream channels (B), and map views of buried channels at site (C)
图 6 北安托尼亚断裂Demir Tepe研究点地貌(A)、探槽DTA1(B)和DTD1探槽北壁(C)解译图[53]
Figure 6. Detailed geomorphological map of the Demir Tepe site (A), representative logs for fault-parallel trenches, including the northern wall of the DTA1 trench (B) and the northern wall of the DTD1 trench (C)
图 7 Demir Tepe研究点埋藏冲沟位错历史重建图[53]
Figure 7. Reconstruction of slip history combined with deposition of individual stratigraphic units and individual amount of slip per event at the Demir Tepe site
表 1 走滑断裂古地震探槽研究信息
Table 1 Summary of paleoseismic investigation on strike-slip faults
断裂 断裂性质 滑动速率
/(mm. a-1)探槽位置
(经度/纬度)探槽海拔/m 探槽点 构造地貌位置 沉积相 沉积速率
/(mm. a-1)事件数量 测年方法 位移 SAF[9-13] 右旋 20-40 -117.667942/34.369594 1969 Wrightwood 断塞塘 冲洪积、沼泽相 5 30 14C 10次事件位移; 利用生长地层方法 SAF[3, 5, 14] 右旋 ~30 -117.887111/34.455861 1147 Pallett Creek 闸门脊 沼泽相 1.4~1.9 12 14C / SAF[6-7] 右旋 34 -119.786028/35.231447
-119.788447/35.234022
-119.788194/35.233753~650 Carrizo Plain 山前冲洪积扇 碎屑流或松散冲积物 6.8 6 14C / SAF[15~16] 右旋 34 -119.823994/35.267811 694 Carrizo Plain 山前冲洪积扇 冲洪积 / 6 14C 6次事件位移 HWF[17-19] 右旋 9 -121.973794/37.555653 16 Tyson's Lagoon 断塞塘 湖相 2.8 12 14C / MCF[20] 右旋 26 -116.308697/33.837006 171 Thousand Palms Oasis 洪积扇扇缘 洪积砂砾和风积砂层 5 5 14C MRE位移 MCF[21] 右旋 26 -116.170464/33.727427 9 Coachella 湖与冲洪积扇相交位置 湖相、冲洪积相和风积相互层 5 7 14C / SAF[22] 右旋 30 / / Pitman Canyon 闸门脊汇水-侧 冲洪积和沼泽相 5 6 14C / SAF[23] 右旋 17~24 -121.679328/36.946767 163 Mill Canyon 闸门脊汇水-侧 冲积扇相:粘土、砂、砾石 / 4 14C / SMF[24] 右旋 5~9 -115.918133/32.983503 18 Imperial Valley 湖岸线 湖相和河床相堆积 / 4 14C MRE位移 SAF[25] 右旋 17 -122.316458/37.472867 130 Woodside 冲洪积扇 河漫滩相和河床相 / 3 14C 最新2次事件 RCF[26] 右旋 6.4~10.4 -122.561611/38.285786 283 Rodgers Creek 冲洪积扇 冲洪积相:以粗砂砾石为卞 / 1 14C MRE位移 SAF[27] 右旋 ~30 -118.903883/34.812444 1275 Frazier Mountain 断塞塘 塘沉积,以粉砂为卞 / 2 14C / SAF[28] 右旋 14~25 -117.137403/34.115325 497 Plunge Creek 山前洪积扇 洪积:以粗砂和砾石为卞 / 2 14C / SAF[29] 右旋 14 -121.793394/37.042836 338 Grizzly flat 闸门脊汇水-侧 洪积砂砾石 / 2 14C / SAF[30-31] 右旋 34 -120.020878/35.469819 669 Northern Carrizo Plain 闸门脊汇水-侧 洪积砂砾石 / 3-4; 0 14C / SAF[32] 右旋 17-24 -121.741483/37.000150 123 Hazel Dell 废弃的断塞塘 塘沉积,以粉砂质粘土、粉细砂为卞 / 3 14C / EF[33] 右旋 5 -117.046089/33.414314 -117.039247/33.402372 600 555 Agua Tibia Mountain 洪积扇和断塞塘 粗粒冲积和细粒塘沉积 / 5; 4 14C / SAF[34] 右旋 24 / / Olema 沼泽 以粘土-粉细砂和泥炭为卞 1.7 12 14C 最新2次事件 SAF[35] 右旋 24 -122.712816/37.947558 42 Dogtown 断层谷底洪积扇 粉砂-砾石 / 2 14C / SAF[36] 右旋 24 -123.239934/38.522077 -123.240486/38.523078 134~140 Fort Ross 闸门脊汇水-侧 洪积物和坡积物 / 3 14C / PVF[37] 右旋 1.75~2 -117.116249/35.750691 -117.116022/35.750361 506 Panamint Valley 洪积扇 粉砂-粘土和砾石 0.9 4 14C / GF[38-39] 左旋 6-8 -117.681366/35.444171 1019 El Paso Peaks 闸门脊汇水-侧 粉细砂 1~1.7 6 14C / GF[40] 左旋 1.6~3.3 -118.509137/34.986378
-118.508462/34.986558
-118.505943/34.9862701550 Twin Lakes 闸门脊汇水-侧 粘土质粉砂-砂砾 0.9 6 14C / CCF[41] 右旋 1.8 -116.661698/34.819779
-116.661130/34.818938555 Newberry Springs 洪积扇外缘淤积平地 粘土-粉砂-粗砂砾石 0.2~2 4 OSL / SJF[42] 右旋 12~14 -116.709204/33.615153 1431 Hog Lake 干湖 以粉砂为卞 1.9 21 14C / MVFZ[43] 右旋 3 -120.512829/39.678930 1714 Sulphur Creek 小型拉分盆地 塘沉积和洪积以及坡积:粘土-粉砂-粗砂砾石 / 4 14C / MVFZ① 右旋 3 -120.401434/39.651628 1496 Calpine 冲积平原 以粘土-粉砂为卞 / 3 14C 最新2次事件的总位移 LLF[44] 右旋 0.2~0.6 -116.357283/34.665307
-116.357582/34.665486
-116.362937/34.676520
-116.361708/34.676070576 Lavic Lake 干湖内部和洪积扇与干湖交互位置 探槽A、B、D以湖相粘土-粉砂为卞;探槽C以湖相和洪积物为卞 0.3~0.5 1 14C / RF[45] 左旋 1.5 -118.057704/34.138535
-118.106097/34.126451163 187 Los Angeles 挤压鼓包一侧 粉砂-砾石 / 6 14C / CF[46] 右旋 10~14 -117.085716/33.897006 433 Mystic Lake 断塞塘 粘土-粉砂 / 7 14C / NAF[47] 右旋 20~30 35.863949/40.962444 894 Alayurt 600m长, 60m宽的小型汇水盆地 粘土粉砂为主的湖相和粗粒坡积物 / 4-5 14C / EAF[48] 左旋 11 39.542595/38.535464
39.550763/38.525123
39.590128/38.543613
39.527003/38.5315861294~1381 Lake Hazar 探槽1和4:闸门脊汇水一侧; 探槽2和3:冲洪积扇之上 均以砂-砾石冲洪积物为主 / 4-5 14C / NAF[49] 右旋 21.4-25.6 34.8964/41.1072 1137 Elmacik 山坡上断层反向陡坎朝山体一侧 中细砾与粗砾互层 / 7 14C / NAF[50] 右旋 18 36.121/40.868 907 Lake Ladik 山坡上断层反向陡坎朝山体一侧 古土壤和坡积物 / 7 14C / NAF[51] 右旋 20-25 38.973179/39.951026 1992 Qukurfimen 1km长, 250m宽的半封闭沼泽盆地 湖相和沼泽相细粒沉积 / 6 14C / NAF[52] 右旋 24 29.859164/40.710463 10 Hisar River 冲洪积扇 以粉砂-砾石为主的坡积物和洪积物 / 2 14C / NAF[53] 右旋 17 32.324202/40.819435 1287 DemirTepe 断塞塘 洪积相、河床相和塘沉积 / 4 14C 4次事件的位移 NAF[54] 右旋 24-29 38.939152/39.958026 1935 Yaylabeli 350m长, 40-60m宽的拉分盆地 以洪积相砂砾石和沼泽相的泥炭层为主 1-3 5 14C / NAF[55] 右旋 17 27.269019/40.731801 151 Guzelkoy 闸门脊汇水一侧 洪积物和塘沉积 / 4 14C 4次事件的位移 NAF[56] 右旋 6.9-15.6 / -300 / 断塞塘、冲洪积扇 冲洪积物和塘沉积 / 3 14C、10Pb / NAF[57] 右旋 6.9-15.6 26.867133/40.612081
26.883544/40.616336
26.878281/40.6148774-6 Kavakkoy 海滨 河漫滩相粘土-粉细砂 / 5 14C / NAF[58] 右旋 16 26.863764/40.610311
30.051/40.723
30.028/40.7245-47 Kavakkoy Ottoman Kosekoy 断塞塘、古冲沟 冲洪积物和塘沉积 / 3-4 14C 2次事件的累积位移 DSF[59] 左旋 4.9 35.557454/32.062453
35.556956/32.064949
35.574029/32.263803
35.574048/32.264257-280 Jordan Valley 小型拉分盆地和河流阶地 冲积相:粘土-砂砾 / 12 14C、考古 / SF[60] 左旋 1.4 36.078015/33.642265 1108 Zebadani Valley 山前洪积扇陡坎 洪积和坡积物 / 6 14C 利用埋藏冲沟获得3个位移量 DSF[61] 左旋 5 35.073972/29.812889 62 Yotvata 洪积扇前缘 中-粗砂 / 9 14C / DSF[62] 左旋 4 35.622090/32.901589 -209 Jordan Gorge 湖滨 三角洲相:粘土、砂-砾石 / 2 14C 2次事件位移量 DSF[63] 左旋 4 35.622090/32.901589 -209 Jordan Gorge 湖滨 三角洲相:粘土、砂-砾石 / 10 14C / YF[64-65] 左旋 3.8-6.4 36.026229/34.114696 1367 Yammouneh 古湖 湖相沉积以石灰质泥为主 0.4-0.8 10-13; 7 14C / AWF[66] 右旋 6-8 173.979462/-41.661433 160 Lake Jasper 拉分盆地 湖相沉积以细粒沉积为主,如粘土、泥炭层等 / 6 14C 最新3次事件的位移 AF[67] 右旋 23 169.070242/-43.911593
169.069181/-43.912435
168.986668/-43.943506
168.986298/-43.943707
168.937919/-43.9648535-20 Haast 河流阶地 河床相和河漫滩相 / 3 14C 获得3次事件的位错量 AF[68] 右旋 23 168.072423/-44.402426 40 Hokuri Creek 河两岸露头 粉砂与泥炭互层 / 22 14C / HF[69] 右旋 23 173.391937/-42.396090 298 Greenbum Stream 闸门脊汇水-侧 以粗粒为主,夹粉细砂层和古土壤层 / 3 14C / WF[70] 右旋 3~6.7 173.510285/-41.582195 173.543515/-41.571086 170~180 Wairau 断层陡坎汇7水-侧; 断塞塘 洪积相粉砂-砾石 / 2-3 14C / AAF[71] 右旋 0.8 55.153395/31.195282 1554 伊朗Anar 洪积扇 粉细砂-砾石 / 3 OSL / NBF[72] 右旋 1.8 57.530353/31.912436 558 伊朗Nayband 断塞塘 以粘土-粉细砂为主 0.1~0.2 6 OSL / ZMHF[73] 左旋 3~12 102.383093/27.665615 2262 大箐梁子 洪积扇上挤压鼓包一侧 以泥炭层和砾石为主 / 2 14C / ZMHF[74] 左旋 3~12 102.360925/27.707067 2603 大箐梁子 断塞塘 以粉砂质粘土为主 / 5 14C / ZMHF[75] 左旋 3~12 102.369819/27.690136 2488 大箐梁子 挤压鼓包、洪积扇和断塞塘 洪积、坡积和泥炭 / 3 14C / ANHF[76] 左旋 4~6.5 102.189104/28.174119 1750 沙沟村 断塞塘 粘土-粉细砂、泥炭层和砾石 / 5 14C / HYF[77] 右旋 5~8 105.255885/36.666358 1983 干盐池 拉分盆地 湖相沉积,以粉砂粘土为主 / 7 14C / HYF[78] 右旋 5~8 105.270229/36.658501 1988 干盐池 拉分盆地 湖相沉积,以粉砂粘土为主 0.4-5 3-4 14C / HYF[79] 右旋 12 103.499383/37.137959 103.509597/37.137726 2790 松山 小型拉分盆地 粘土-粉细砂 0.5~1 6 14C / HYF[80] 右旋 5~8 105.172352/36.697010 2199 高湾子 T2阶地断塞塘 冲积物为粘土-粉细砂-砾石 / 7 14C、TL 5次事件位移 ATF[81] 左旋 10 89.874803/38.387171
91.265519/38.78127
91.294724/38.7904542880~3329 索尔库里 闸门脊和洪积扇 洪积和坡积物 / 2~3 14C、OSL / ATF[82] 左旋 10 91.757499/38.919703 3034 索尔库里 洪积扇 洪积物以细沙-中粗砂为主 / 2~3 14C / ATF[83] 左旋 < 10 94.399750/39.435444 2869 半果巴 洪积扇 冲洪积和塘沉积为粘土质粉砂-砾石 / 7;2 14C / ATF[84] 左旋 < 10 94.189853/39.390597 2756 阿克塞老县城西 小型拉分盆地 粉细砂-砾石 / 4;2 14C / -
冉勇康, 邓起东.古地震学研究的历史, 现状和发展趋势[J].科学通报, 1999, 44(1):12-20. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199901002.htm 刘静, 徐锡伟, 李岩峰, 等.以海原断裂甘肃老虎山段为例浅析走滑断裂古地震记录的完整性[J].地质通报, 2007, 26(6):250-260. http://dzhtb.cgs.cn/ch/reader/view_abstract.aspx?flag=1&file_no=200706114&journal_id=gbc Sieh K E. Prehistoric large earthquakes produced by slip on the San Andreas Fault at Pallett Creek, California[J]. Journal of Geophysical Research, 1978,83:3907-3939. doi: 10.1029/JB083iB08p03907 Sieh K E. Prehistoric large earthquakes produced by slip on the San Andreas Fault at Pallett Creek, California[J]. Journal of Geophysical Research, 1978, 83:3907-3939. doi: 10.1029/JB083iB08p03907
Sieh K, Stuiver M, Brillinger D. A more precise chronology of earthquakes produced by the San Andreas fault in southern California[J]. Journal of Geophysical Research, 1989,94(B1):603-623. doi: 10.1029/JB094iB01p00603 Sieh K, Stuiver M, Brillinger D. A more precise chronology of earthquakes produced by the San Andreas fault in southern California[J]. Journal of Geophysical Research, 1989, 94(B1):603-623. doi: 10.1029/JB094iB01p00603
Scharer K M, Biasi G P, Weldon R J. A reevaluation of the Pallett Creek earthquake chronology based on new AMS radiocarbon dates, San Andreas fault, California[J]. Journal of Geophysical Research, 2011,116(B12111),doi: 10.1029/2010JB008099. Scharer K M, Biasi G P, Weldon R J. A reevaluation of the Pallett Creek earthquake chronology based on new AMS radiocarbon dates, San Andreas fault, California[J]. Journal of Geophysical Research, 2011, 116(B12111), doi: 10.1029/2010JB008099.
Grant L B, Sieh K. Paleoseismic evidence of clustered earthquakes on the San Andreas fault in the Carrizo Plain, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 1994,99(B4):6819-6841. doi: 10.1029/94JB00125 Grant L B, Sieh K. Paleoseismic evidence of clustered earthquakes on the San Andreas fault in the Carrizo Plain, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 1994, 99(B4):6819-6841. doi: 10.1029/94JB00125
Akciz S O, Ludwig L G, Arrowsmith J R, et al. Century-long average time intervals between earthquake ruptures of the San Andreas fault in the Carrizo Plain, California[J]. Geology, 2010,38(9):787-790. doi: 10.1130/G30995.1 Akciz S O, Ludwig L G, Arrowsmith J R, et al. Century-long average time intervals between earthquake ruptures of the San Andreas fault in the Carrizo Plain, California[J]. Geology, 2010, 38(9):787-790. doi: 10.1130/G30995.1
McCalpin J P. Paleoseismology[M]. Academic press, San Diego, California, USA, 2009:675. McCalpin J P. Paleoseismology[M]. Academic press, San Diego, California, USA, 2009:675.
Fumal T E, Schwartz D P, Pezzopane S K, et al. A 100-year average recurrence interval for the San Andreas fault at Wrightwood, California[J]. Science, 1993,259(5092):199-203. doi: 10.1126/science.259.5092.199 Fumal T E, Schwartz D P, Pezzopane S K, et al. A 100-year average recurrence interval for the San Andreas fault at Wrightwood, California[J]. Science, 1993, 259(5092):199-203. doi: 10.1126/science.259.5092.199
Fumal T, Weldon R, Biasi G, et al. Evidence for large earthquakes on the San Andreas fault at the Wrightwood, California, paleoseismic site:AD 500 to present[J]. Bulletin of the Seismological Society of America, 2002,92(7):2726-2760. doi: 10.1785/0120000608 Fumal T, Weldon R, Biasi G, et al. Evidence for large earthquakes on the San Andreas fault at the Wrightwood, California, paleoseismic site:AD 500 to present[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2726-2760. doi: 10.1785/0120000608
Scharer K M, Weldon R J, Fumal T E, et al. Paleoearthquakes on the Southern San Andreas Fault, Wrightwood, California, 3000 to 1500B.C.:A New Method for Evaluating Paleoseismic Evidence and Earthquake Horizons[J]. Bulletin of the Seismological Society of America, 2007,97(4):1054-1093. doi: 10.1785/0120060137 Scharer K M, Weldon R J, Fumal T E, et al. Paleoearthquakes on the Southern San Andreas Fault, Wrightwood, California, 3000 to 1500B.C.:A New Method for Evaluating Paleoseismic Evidence and Earthquake Horizons[J]. Bulletin of the Seismological Society of America, 2007, 97(4):1054-1093. doi: 10.1785/0120060137
Weldon R, Fumal T, Powers T, et al. Structure and earthquake offsets on the San Andreas fault at the Wrightwood, California, paleoseismic site[J]. Bulletin of the Seismological Society of America, 2002,92(7):2704-2725. doi: 10.1785/0120000612 Weldon R, Fumal T, Powers T, et al. Structure and earthquake offsets on the San Andreas fault at the Wrightwood, California, paleoseismic site[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2704-2725. doi: 10.1785/0120000612
Weldon R, Scharer K, Fumal T, et al. Wrightwood and the earthquake cycle:What a long recurrence record tells us about how faults work[J]. GSA Today, 2004,14(9):4-10. doi: 10.1130/1052-5173(2004)014<4:WATECW>2.0.CO;2 Weldon R, Scharer K, Fumal T, et al. Wrightwood and the earthquake cycle:What a long recurrence record tells us about how faults work[J]. GSA Today, 2004, 14(9):4-10. doi: 10.1130/1052-5173(2004)014<4:WATECW>2.0.CO;2
Sieh K E. Lateral offsets and revised dates of large prehistoric earth-quakes at Pallett Creek, southern California[J]. Journal of Geophysical Research, 1984,89(B9):7641-7670. doi: 10.1029/JB089iB09p07641 Sieh K E. Lateral offsets and revised dates of large prehistoric earth-quakes at Pallett Creek, southern California[J]. Journal of Geophysical Research, 1984, 89(B9):7641-7670. doi: 10.1029/JB089iB09p07641
Liu J, Klinger Y, Sieh K, et al. Six similar sequential ruptures of the San Andreas fault, Carrizo Plain, California[J]. Geology, 2004,32(8):649-652. doi: 10.1130/G20478.1 Liu J, Klinger Y, Sieh K, et al. Six similar sequential ruptures of the San Andreas fault, Carrizo Plain, California[J]. Geology, 2004, 32(8):649-652. doi: 10.1130/G20478.1
Liu Z J, Klinger Y, Sieh K, et al. Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations[J]. Journal of Geophysical Research, 2006,111(B02306),doi: 10.1029/2004JB003601. Liu Z J, Klinger Y, Sieh K, et al. Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations[J]. Journal of Geophysical Research, 2006, 111(B02306), doi: 10.1029/2004JB003601.
Lienkaemper J J, Dawson T E, Personius S F, et al. A record of large earthquakes on the southern Hayward fault for the past 500 years[J]. Bulletin of the Seismological Society of America, 2002,92(7):2637-2658. doi: 10.1785/0120000611 Lienkaemper J J, Dawson T E, Personius S F, et al. A record of large earthquakes on the southern Hayward fault for the past 500 years[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2637-2658. doi: 10.1785/0120000611
Lienkaemper J J, Williams P L. A Record of Large Earthquakes on the Southern Hayward Fault for the Past 1800 Years[J]. Bulletin of the Seismological Society of America, 2007,97(6):1803-1819. doi: 10.1785/0120060258 Lienkaemper J J, Williams P L. A Record of Large Earthquakes on the Southern Hayward Fault for the Past 1800 Years[J]. Bulletin of the Seismological Society of America, 2007, 97(6):1803-1819. doi: 10.1785/0120060258
李占飞, 刘静, 邵延秀, 等.基于LiDAR的海原断裂松山段断错地貌分析与古地震探槽选址实例[J].地质通报, 2016, 35(1):104-116. http://dzhtb.cgs.cn/ch/reader/view_abstract.aspx?flag=1&file_no=20160109&journal_id=gbc Fumal T, Rymer M, Seitz G. Timing of large earthquakes since AD 800 on the Mission Creek strand of the San Andreas fault zone at Thousand Palms Oasis, near Palm Springs, California[J]. Bulletin of the Seismological Society of America, 2002,92(7):2841-2860. doi: 10.1785/0120000609 Fumal T, Rymer M, Seitz G. Timing of large earthquakes since AD 800 on the Mission Creek strand of the San Andreas fault zone at Thousand Palms Oasis, near Palm Springs, California[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2841-2860. doi: 10.1785/0120000609
Philibosian B, Fumal T, Weldon R. San Andreas fault earthquake chronology and Lake Cahuilla history at Coachella, California[J]. Bulletin of the Seismological Society of America, 2011,101(1):13-38. doi: 10.1785/0120100050 Philibosian B, Fumal T, Weldon R. San Andreas fault earthquake chronology and Lake Cahuilla history at Coachella, California[J]. Bulletin of the Seismological Society of America, 2011, 101(1):13-38. doi: 10.1785/0120100050
Seitz G, Weldon R, Biasi G P. The Pitman Canyon paleoseismic record:A re-evaluation of southern San Andreas fault segmentation[J]. Journal of Geodynamics, 1997,24(1):129-138. Seitz G, Weldon R, Biasi G P. The Pitman Canyon paleoseismic record:A re-evaluation of southern San Andreas fault segmentation[J]. Journal of Geodynamics, 1997, 24(1):129-138.
Fumal T E. Timing of large earthquakes during the past 500 years along the Santa Cruz mountains segment of the San Andreas fault at Mill Canyon, near Watsonville, California[J]. Bulletin of the Seismological Society of America, 2012,102(3):1099-1119. doi: 10.1785/0120110161 Fumal T E. Timing of large earthquakes during the past 500 years along the Santa Cruz mountains segment of the San Andreas fault at Mill Canyon, near Watsonville, California[J]. Bulletin of the Seismological Society of America, 2012, 102(3):1099-1119. doi: 10.1785/0120110161
Gurrola L D, Rockwell T K. Timing and slip for prehistoric earthquakes on the Superstition Mountain Fault, Imperial Valley, southern California[J]. Journal of Geophysical Research, 1996,101(B3):5977-5985. doi: 10.1029/95JB03061 Gurrola L D, Rockwell T K. Timing and slip for prehistoric earthquakes on the Superstition Mountain Fault, Imperial Valley, southern California[J]. Journal of Geophysical Research, 1996, 101(B3):5977-5985. doi: 10.1029/95JB03061
Hall N T, Wright R H, Clahan K B. Paleoseismic studies of the San Francisco Peninsula segment of the San Andreas Fault zone near Woodside, California[J]. Journal of Geophysical Research, 1999,104(B10):23215-23236. doi: 10.1029/1999JB900157 Hall N T, Wright R H, Clahan K B. Paleoseismic studies of the San Francisco Peninsula segment of the San Andreas Fault zone near Woodside, California[J]. Journal of Geophysical Research, 1999, 104(B10):23215-23236. doi: 10.1029/1999JB900157
Hecker S. The Most Recent Large Earthquake on the Rodgers Creek Fault, San Francisco Bay Area[J]. Bulletin of the Seismological Society of America, 2005,95(3):844-860. doi: 10.1785/0120040134 Hecker S. The Most Recent Large Earthquake on the Rodgers Creek Fault, San Francisco Bay Area[J]. Bulletin of the Seismological Society of America, 2005, 95(3):844-860. doi: 10.1785/0120040134
Lindvall S C, Rockwell T K, Dawson T E, et al. Evidence for two surface ruptures in the past 500 years on the San Andreas fault at Frazier Mountain, California[J]. Bulletin of the Seismological Society of America, 2002,92(7):2689-2703. doi: 10.1785/0120000610 Lindvall S C, Rockwell T K, Dawson T E, et al. Evidence for two surface ruptures in the past 500 years on the San Andreas fault at Frazier Mountain, California[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2689-2703. doi: 10.1785/0120000610
McGill S, Dergham S, Barton K, et al. Paleoseismology of the San Andreas Fault at Plunge Creek, near San Bernardino, Southern California[J]. Bulletin of the Seismological Society of America, 2002,92(7):2803-2840. doi: 10.1785/0120000607 McGill S, Dergham S, Barton K, et al. Paleoseismology of the San Andreas Fault at Plunge Creek, near San Bernardino, Southern California[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2803-2840. doi: 10.1785/0120000607
Schwartz D P, Pantosti D, Okumura K, et al. Paleoseismic investigations in the Santa Cruz mountains, California:Implications for recurrence of large-magnitude earthquakes on the San Andreas Fault[J]. Journal of Geophysical Research, 1998,103(B8):17985-18001. doi: 10.1029/98JB00701 Schwartz D P, Pantosti D, Okumura K, et al. Paleoseismic investigations in the Santa Cruz mountains, California:Implications for recurrence of large-magnitude earthquakes on the San Andreas Fault[J]. Journal of Geophysical Research, 1998, 103(B8):17985-18001. doi: 10.1029/98JB00701
Stone E M, Grant L B, Arrowsmith J R. Recent rupture history of the San Andreas fault southeast of Cholame in the northern Carrizo Plain, California[J]. Bulletin of the Seismological Society of America, 2002,92(3):983-997. doi: 10.1785/0120000005 Stone E M, Grant L B, Arrowsmith J R. Recent rupture history of the San Andreas fault southeast of Cholame in the northern Carrizo Plain, California[J]. Bulletin of the Seismological Society of America, 2002, 92(3):983-997. doi: 10.1785/0120000005
Young J J, Arrowsmith J R, Colini L, et al. Three-dimensional excavation and recent rupture history along the Cholame segment of the San Andreas fault[J]. Bulletin of the Seismological Society of America, 2002,92(7):2670-2688. doi: 10.1785/0120000604 Young J J, Arrowsmith J R, Colini L, et al. Three-dimensional excavation and recent rupture history along the Cholame segment of the San Andreas fault[J]. Bulletin of the Seismological Society of America, 2002, 92(7):2670-2688. doi: 10.1785/0120000604
Streig A R, Dawson T E, Weldon R J. Paleoseismic Evidence of the 1890 and 1838 Earthquakes on the Santa Cruz Mountains Section of the San Andreas Fault, near Corralitos, California[J]. Bulletin of the Seismological Society of America, 2014,104(1):285-300. doi: 10.1785/0120130009 Streig A R, Dawson T E, Weldon R J. Paleoseismic Evidence of the 1890 and 1838 Earthquakes on the Santa Cruz Mountains Section of the San Andreas Fault, near Corralitos, California[J]. Bulletin of the Seismological Society of America, 2014, 104(1):285-300. doi: 10.1785/0120130009
Vaughan P R, Thorup K M, Rockwell T K. Paleoseismology of the Elsinore fault at Agua Tibia Mountain southern California[J]. Bulletin of the Seismological Society of America, 1999,89(6):1447-1457. Vaughan P R, Thorup K M, Rockwell T K. Paleoseismology of the Elsinore fault at Agua Tibia Mountain southern California[J]. Bulletin of the Seismological Society of America, 1999, 89(6):1447-1457.
Zhang H, Niemi T, Fumal T. A 3000-year record of earthquakes on the northern San Andreas fault at the Vedanta marsh site, Olema, California[J]. Seismol. Res. Lett., 2006,77(176):96. Zhang H, Niemi T, Fumal T. A 3000-year record of earthquakes on the northern San Andreas fault at the Vedanta marsh site, Olema, California[J]. Seismol. Res. Lett., 2006, 77(176):96.
Hall N T, Niemi T M. The 1906 earthquake fault rupture and paleoseismic investigation of the northern San Andreas fault at the Dogtown site, Marin County, California[J]. Bulletin of the Seismological Society of America, 2008,98(5):2191-2208. doi: 10.1785/0120060414 Hall N T, Niemi T M. The 1906 earthquake fault rupture and paleoseismic investigation of the northern San Andreas fault at the Dogtown site, Marin County, California[J]. Bulletin of the Seismological Society of America, 2008, 98(5):2191-2208. doi: 10.1785/0120060414
Kelson K I, Streig A R, Koehler R D, et al. Timing of late Holocene paleoearthquakes on the northern San Andreas fault at the Fort Ross Orchard site, Sonoma County, California[J]. Bulletin of the Seismological Society of America, 2006,96(3):1012-1028. doi: 10.1785/0120050123 Kelson K I, Streig A R, Koehler R D, et al. Timing of late Holocene paleoearthquakes on the northern San Andreas fault at the Fort Ross Orchard site, Sonoma County, California[J]. Bulletin of the Seismological Society of America, 2006, 96(3):1012-1028. doi: 10.1785/0120050123
McAuliffe L J, Dolan J F, Kirby E, et al. Paleoseismology of the southern Panamint Valley fault:Implications for regional earthquake occurrence and seismic hazard in southern California[J]. Journal of Geophysical Research:Solid Earth, 2013,118(9):5126-5146. doi: 10.1002/jgrb.50359 McAuliffe L J, Dolan J F, Kirby E, et al. Paleoseismology of the southern Panamint Valley fault:Implications for regional earthquake occurrence and seismic hazard in southern California[J]. Journal of Geophysical Research:Solid Earth, 2013, 118(9):5126-5146. doi: 10.1002/jgrb.50359
McGill S, Rockwell T. Ages of late Holocene earthquakes on the central Garlock fault near El Paso Peaks, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 1998,103(B4):7265-7279. doi: 10.1029/97JB02129 McGill S, Rockwell T. Ages of late Holocene earthquakes on the central Garlock fault near El Paso Peaks, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 1998, 103(B4):7265-7279. doi: 10.1029/97JB02129
Dawson T E, McGill S, Rockwell T. Irregular recurrence of paleoearthquakes along the central Garlock fault near El Paso Peaks, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 2003,108(B7):2356-2365. Dawson T E, McGill S, Rockwell T. Irregular recurrence of paleoearthquakes along the central Garlock fault near El Paso Peaks, California[J]. Journal of Geophysical Research:Solid Earth (1978-2012), 2003, 108(B7):2356-2365.
Madden Ma C, Dolan J F, Hartleb R D. New Paleoearthquake Ages from the Western Garlock Fault:Implications for Regional Earthquake Occurrence in Southern California[J]. Bulletin of the Seismological Society of America, 2012,102(6):2282-2299. doi: 10.1785/0120110310 Madden Ma C, Dolan J F, Hartleb R D. New Paleoearthquake Ages from the Western Garlock Fault:Implications for Regional Earthquake Occurrence in Southern California[J]. Bulletin of the Seismological Society of America, 2012, 102(6):2282-2299. doi: 10.1785/0120110310
Ganev P N, Dolan J F, Blisniuk K, et al. Paleoseismologic evidence for multiple Holocene earthquakes on the Calico fault:Implications for earthquake clustering in the Eastern California shear zone[J]. Lithosphere, 2010,2(4):287-298. doi: 10.1130/L82.1 Ganev P N, Dolan J F, Blisniuk K, et al. Paleoseismologic evidence for multiple Holocene earthquakes on the Calico fault:Implications for earthquake clustering in the Eastern California shear zone[J]. Lithosphere, 2010, 2(4):287-298. doi: 10.1130/L82.1
Rockwell T K, Dawson T E, Young Ben-Horin J, et al. A ault in South Westland, New Zealand[J]. Bulletin of the Seismological Society of America, 2012,102(2):620-638.for Long-term Earthquake Production on a Major Plate Boundary Fault[J]. Pure and Applied Geophysics, 2014,172(5):1143-1165. Rockwell T K, Dawson T E, Young Ben-Horin J, et al. A 21-Event, 4, 000-Year History of Surface Ruptures in the Anza Seismic Gap, San Jacinto Fault, and Implications for Long-term Earthquake Production on a Major Plate Boundary Fault[J]. Pure and Applied Geophysics, 2014, 172(5):1143-1165.
Gold R D, Briggs R W, Personius S F, et al. Latest Quaternary paleoseismology and evidence of distributed dextral shear along the Mohawk Valley fault zone, northern Walker Lane, California[J]. Journal of Geophysical Research:Solid Earth, 2014,119(6):5014-5032. doi: 10.1002/2014JB010987 Gold R D, Briggs R W, Personius S F, et al. Latest Quaternary paleoseismology and evidence of distributed dextral shear along the Mohawk Valley fault zone, northern Walker Lane, California[J]. Journal of Geophysical Research:Solid Earth, 2014, 119(6):5014-5032. doi: 10.1002/2014JB010987
Rymer M J, Seitz G G, Weaver K D, et al. Geologic and paleoseismic study of the Lavic Lake fault at Lavic Lake playa, Mojave Desert, southern California[J]. Bulletin of the Seismological Society of America, 2002,92(4):1577-1591. doi: 10.1785/0120000936 Rymer M J, Seitz G G, Weaver K D, et al. Geologic and paleoseismic study of the Lavic Lake fault at Lavic Lake playa, Mojave Desert, southern California[J]. Bulletin of the Seismological Society of America, 2002, 92(4):1577-1591. doi: 10.1785/0120000936
Weaver K D, Dolan J F. Paleoseismology and geomorphology of the Raymond fault, Los Angeles County, California[J]. Bulletin of the Seismological Society of America, 2000,90(6):1409-1429. doi: 10.1785/0119990075 Weaver K D, Dolan J F. Paleoseismology and geomorphology of the Raymond fault, Los Angeles County, California[J]. Bulletin of the Seismological Society of America, 2000, 90(6):1409-1429. doi: 10.1785/0119990075
Onderdonk N W, Rockwell T K, McGill S F, et al. Evidence for Seven Surface Ruptures in the Past 1600 Years on the Claremont Fault at Mystic Lake, Northern San Jacinto Fault Zone, California[J]. Bulletin of the Seismological Society of America, 2013,103(1):519-541. doi: 10.1785/0120120060 Onderdonk N W, Rockwell T K, McGill S F, et al. Evidence for Seven Surface Ruptures in the Past 1600 Years on the Claremont Fault at Mystic Lake, Northern San Jacinto Fault Zone, California[J]. Bulletin of the Seismological Society of America, 2013, 103(1):519-541. doi: 10.1785/0120120060
Hartleb R D, Dolan J F, Akyüz H S, et al. A 2000-year-long paleoseismologic record of earthquakes along the central North Anatolian Fault, from trenches at Alayurt, Turkey[J]. Bulletin of the Seismological Society of America, 2003,93(5):1935-1954. doi: 10.1785/0120010271 Hartleb R D, Dolan J F, Akyüz H S, et al. A 2000-year-long paleoseismologic record of earthquakes along the central North Anatolian Fault, from trenches at Alayurt, Turkey[J]. Bulletin of the Seismological Society of America, 2003, 93(5):1935-1954. doi: 10.1785/0120010271
Cetin H, Güneyli H, Mayer L. Paleoseismology of the Palu-Lake Hazar segment of the East Anatolian Fault Zone, Turkey[J]. Tectonophysics, 2003,374(3/4):163-197. Cetin H, Güneyli H, Mayer L. Paleoseismology of the Palu-Lake Hazar segment of the East Anatolian Fault Zone, Turkey[J]. Tectonophysics, 2003, 374(3/4):163-197.
Fraser J, Hubert-Ferrari A, Vanneste K, et al. A relict paleoseismic record of seven earthquakes between 2000 B.C. and 600 A.D. on the central North Anatolian fault at Elmacik, near Osmancik, Turkey[J]. Geological Society of America Bulletin, 2010,122(11/12):1830-1845. Fraser J, Hubert-Ferrari A, Vanneste K, et al. A relict paleoseismic record of seven earthquakes between 2000 B.C. and 600 A.D. on the central North Anatolian fault at Elmacik, near Osmancik, Turkey[J]. Geological Society of America Bulletin, 2010, 122(11/12):1830-1845.
Fraser J, Pigati J S, Hubert-Ferrari A, et al. A 3000-Year Record of Ground-Rupturing Earthquakes along the Central North Anatolian Fault near Lake Ladik, Turkey[J]. Bulletin of the Seismological Society of America, 2009,99(5):2681-2703. doi: 10.1785/0120080024 Fraser J, Pigati J S, Hubert-Ferrari A, et al. A 3000-Year Record of Ground-Rupturing Earthquakes along the Central North Anatolian Fault near Lake Ladik, Turkey[J]. Bulletin of the Seismological Society of America, 2009, 99(5):2681-2703. doi: 10.1785/0120080024
Hartleb R D, Dolan J F, Kozaci O, et al. A 2500-yr-long paleoseismologic record of large, infrequent earthquakes on the North Anatolian fault at Cukurcimen, Turkey[J]. Geological Society of America Bulletin, 2006,118(7/8):823-840. Hartleb R D, Dolan J F, Kozaci O, et al. A 2500-yr-long paleoseismologic record of large, infrequent earthquakes on the North Anatolian fault at Cukurcimen, Turkey[J]. Geological Society of America Bulletin, 2006, 118(7/8):823-840.
Klinger Y, Sieh K, Altunel E, et al. Paleoseismic evidence of characteristic slip on the western segment of the North Anatolian Fault, Turkey[J]. Bulletin of the Seismological Society of America, 2003, 93(6):2317-2332. doi: 10.1785/0120010270 Klinger Y, Sieh K, Altunel E, et al. Paleoseismic evidence of characteristic slip on the western segment of the North Anatolian Fault, Turkey[J]. Bulletin of the Seismological Society of America, 2003, 93(6):2317-2332. doi: 10.1785/0120010270
Kondo H, Özaksoy V, Yıldirim C. Slip history of the 1944 BoluGerede earthquake rupture along the North Anatolian fault system:Implications for recurrence behavior of multisegment earthquakes[J]. Journal of Geophysical Research, 2010,115(B4), doi: 10.1029/2009JB006413. Kondo H, Özaksoy V, Yıldirim C. Slip history of the 1944 BoluGerede earthquake rupture along the North Anatolian fault system:Implications for recurrence behavior of multisegment earthquakes[J]. Journal of Geophysical Research, 2010, 115(B4), doi: 10.1029/2009JB006413.
Kozaci O, Dolan J F, Yonlu O, et al. Paleoseismologic evidence for the relatively regular recurrence of infrequent, large-magnitude earthquakes on the eastern North Anatolian fault at Yaylabeli, Turkey[J]. Lithosphere, 2010,3(1):37-54. Kozaci O, Dolan J F, Yonlu O, et al. Paleoseismologic evidence for the relatively regular recurrence of infrequent, large-magnitude earthquakes on the eastern North Anatolian fault at Yaylabeli, Turkey[J]. Lithosphere, 2010, 3(1):37-54.
Meghraoui M, Aksoy M E, Akyüz H S, et al. Paleoseismology of the North Anatolian Fault at Güzelköy (Ganos segment, Turkey):Size and recurrence time of earthquake ruptures west of the Sea of Marmara[J]. Geochemistry, Geophysics, Geosystems, 2012,13(4), doi: 10.1029/2011GC003960. Meghraoui M, Aksoy M E, Akyüz H S, et al. Paleoseismology of the North Anatolian Fault at Güzelköy (Ganos segment, Turkey):Size and recurrence time of earthquake ruptures west of the Sea of Marmara[J]. Geochemistry, Geophysics, Geosystems, 2012, 13(4), doi: 10.1029/2011GC003960.
Pantosti D, Pucci S, Palyvos N, et al. Paleoearthquakes of the Düzce fault (North Anatolian Fault Zone):Insights for large surface faulting earthquake recurrence[J]. Journal of Geophysical Research, 2008,113(B01309),doi: 10.1029/2006JB004679. Pantosti D, Pucci S, Palyvos N, et al. Paleoearthquakes of the Düzce fault (North Anatolian Fault Zone):Insights for large surface faulting earthquake recurrence[J]. Journal of Geophysical Research, 2008, 113(B01309), doi: 10.1029/2006JB004679.
Rockwell T, Barka A, Dawson T, et al. Paleoseismology of the Gazikoy-Saros segment of the North Anatolia fault, northwestern Turkey:Comparison of the historical and paleoseismic records, implications of regional seismic hazard, and models of earthquake recurrence[J]. Journal of Seismology, 2001,5(3):433-448. doi: 10.1023/A:1011435927983 Rockwell T, Barka A, Dawson T, et al. Paleoseismology of the Gazikoy-Saros segment of the North Anatolia fault, northwestern Turkey:Comparison of the historical and paleoseismic records, implications of regional seismic hazard, and models of earthquake recurrence[J]. Journal of Seismology, 2001, 5(3):433-448. doi: 10.1023/A:1011435927983
Rockwell T, Ragona D, Seitz G, et al. Palaeoseismology of the North Anatolian Fault near the Marmara Sea:implications for fault segmentation and seismic hazard[J]. Geological Society, London, Special Publications, 2009,316(1):31-54. doi: 10.1144/SP316.3 Rockwell T, Ragona D, Seitz G, et al. Palaeoseismology of the North Anatolian Fault near the Marmara Sea:implications for fault segmentation and seismic hazard[J]. Geological Society, London, Special Publications, 2009, 316(1):31-54. doi: 10.1144/SP316.3
Ferry M, Meghraoui M, Abou Karaki N, et al. Episodic Behavior of the Jordan Valley Section of the Dead Sea Fault Inferred from a 14-ka-Long Integrated Catalog of Large Earthquakes[J]. Bulletin of the Seismological Society of America, 2011,101(1):39-67. doi: 10.1785/0120100097 Ferry M, Meghraoui M, Abou Karaki N, et al. Episodic Behavior of the Jordan Valley Section of the Dead Sea Fault Inferred from a 14-ka-Long Integrated Catalog of Large Earthquakes[J]. Bulletin of the Seismological Society of America, 2011, 101(1):39-67. doi: 10.1785/0120100097
Gomez F, Meghraoui M, Darkal A N, et al. Holocene faulting and earthquake recurrence along the Serghaya branch of the Dead Sea fault system in Syria and Lebanon[J]. Geophysical Journal International, 2003,153(3):658-674. doi: 10.1046/j.1365-246X.2003.01933.x Gomez F, Meghraoui M, Darkal A N, et al. Holocene faulting and earthquake recurrence along the Serghaya branch of the Dead Sea fault system in Syria and Lebanon[J]. Geophysical Journal International, 2003, 153(3):658-674. doi: 10.1046/j.1365-246X.2003.01933.x
Klinger Y, Le Beon M, Al-Qaryouti M. 5000 yr of paleoseismicity along the southern Dead Sea fault[J]. Geophysical Journal International, 2015,202(1):313-327. doi: 10.1093/gji/ggv134 Klinger Y, Le Beon M, Al-Qaryouti M. 5000 yr of paleoseismicity along the southern Dead Sea fault[J]. Geophysical Journal International, 2015, 202(1):313-327. doi: 10.1093/gji/ggv134
Marco S, Rockwell T, Heimann A, et al. Late Holocene activity of the Dead Sea Transform revealed in 3D palaeoseismic trenches on the Jordan Gorge segment[J]. Earth and Planetary Science Letters, 2005,234(1/2):189-205. Marco S, Rockwell T, Heimann A, et al. Late Holocene activity of the Dead Sea Transform revealed in 3D palaeoseismic trenches on the Jordan Gorge segment[J]. Earth and Planetary Science Letters, 2005, 234(1/2):189-205.
Wechsler N, Rockwell T K, Klinger Y, et al. A Paleoseismic Record of Earthquakes for the Dead Sea Transform Fault between the First and Seventh Centuries C.E.:Nonperiodic Behavior of a Plate Boundary Fault[J]. Bulletin of the Seismological Society of America, 2014,104(3):1329-1347. doi: 10.1785/0120130304 Wechsler N, Rockwell T K, Klinger Y, et al. A Paleoseismic Record of Earthquakes for the Dead Sea Transform Fault between the First and Seventh Centuries C.E.:Nonperiodic Behavior of a Plate Boundary Fault[J]. Bulletin of the Seismological Society of America, 2014, 104(3):1329-1347. doi: 10.1785/0120130304
Daëron M, Klinger Y, Tapponnier P, et al. Sources of the large AD 1202 and 1759 Near East earthquakes[J]. Geology, 2005,33(7):529-532. doi: 10.1130/G21352.1 Daëron M, Klinger Y, Tapponnier P, et al. Sources of the large AD 1202 and 1759 Near East earthquakes[J]. Geology, 2005, 33(7):529-532. doi: 10.1130/G21352.1
Daëron M, Klinger Y, Tapponnier P, et al. 12,000-year-long record of 10 to 13 paleoearthquakes on the Yammouneh fault, Levant fault system, Lebanon[J]. Bulletin of the Seismological Society of America, 2007,97(3):749-771. doi: 10.1785/0120060106 Daëron M, Klinger Y, Tapponnier P, et al. 12, 000-year-long record of 10 to 13 paleoearthquakes on the Yammouneh fault, Levant fault system, Lebanon[J]. Bulletin of the Seismological Society of America, 2007, 97(3):749-771. doi: 10.1785/0120060106
Benson A, Little T, Van Dissen R, et al. Late Quaternary paleoseismic history and surface rupture characteristics of the eastern Awatere strike-slip fault, New Zealand[J]. Geological Society of America Bulletin, 2001,113(8):1079-1091. doi: 10.1130/0016-7606(2001)113<1079:LQPHAS>2.0.CO;2 Benson A, Little T, Van Dissen R, et al. Late Quaternary paleoseismic history and surface rupture characteristics of the eastern Awatere strike-slip fault, New Zealand[J]. Geological Society of America Bulletin, 2001, 113(8):1079-1091. doi: 10.1130/0016-7606(2001)113<1079:LQPHAS>2.0.CO;2
Berryman K, Cooper A, Norris R, et al. Late Holocene Rupture History of the Alpine F doi: 10.1785/0120110177 Berryman K, Cooper A, Norris R, et al. Late Holocene Rupture History of the Alpine Fault in South Westland, New Zealand[J]. Bulletin of the Seismological Society of America, 2012, 102(2):620-638. doi: 10.1785/0120110177
Berryman K R, Cochran U A, Clark K J, et al. Major earthquakes occur regularly on an isolated plate boundary fault[J]. Science, 2012, 336(6089):1690-1693. doi: 10.1126/science.1218959
Langridge R, Campbell J, Hill N, et al. Paleoseismology and slip rate of the Conway Segment of the Hope Faultat Greenburn Stream, South Island, New Zealand[J]. Annals of Geophysics, 2003, 46(5):1119-1139.
Zachariasen J, Berryman K, Langridge R, et al. Timing of late Holocene surface rupture of the Wairau Fault, Marlborough, New Zealand[J]. New Zealand Journal of Geology and Geophysics, 2006, 49(1):159-174. doi: 10.1080/00288306.2006.9515156
Foroutan M, Sébrier M, Nazari H, et al. New evidence for large earthquakes on the Central Iran plateau:palaeoseismology of the Anar fault[J]. Geophysical Journal International, 2012,189(1):6-18. doi: 10.1111/gji.2012.189.issue-1
Foroutan M, Meyer B, Sébrier M, et al. Late Pleistocene-Holocene right slip rate and paleoseismology of the Nayband fault, western margin of the Lut block, Iran[J]. Journal of Geophysical Research:Solid Earth, 2014,119(4):3517-3560. doi: 10.1002/2013JB010746
He H, Ren J. Holocene earthquakes on the Zemuhe fault in southwestern China[J]. Annals of Geophysics, 2003,46(5):1035-1051.
Wang H, Ran Y, Li Y, et al. Holocene palaeoseismologic record of earthquakes on the Zemuhe fault on the southeastern margin of the Tibetan Plateau[J]. Geophysical Journal International, 2013,193(1):11-28. doi: 10.1093/gji/ggs095
田勤俭, 任治坤, 张军龙. 则木河断裂带大箐梁子附近古地震组合探槽研究[J]. 地震地质, 2008,30(2):400-411. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ200802007.htm Wang H, Ran Y, Li Y, et al. A 3400-year-long paleoseismologic record of earthquakes on the southern segment of Anninghe fault on the southeastern margin of the Tibetan Plateau[J]. Tectonophysics, 2014,628:206-217. doi: 10.1016/j.tecto.2014.04.040
Li Y, Ran Y, Wang H, et al. Paleoseismic records of large earthquakes on the cross-basin fault in the Ganyanchi pull-apart basin, Haiyuan fault, northeastern Tibetan Plateau[J]. Natural Hazards, 2013,71(3):1695-1713.
Liu Z J, Shao Y, Klinger Y, et al. Variability in magnitude of paleoearthquakes revealed by trenching and historical records, along the Haiyuan fault, China[J]. Journal of Geophysical Research:Solid Earth, 2015,120(12):8304-8333. doi: 10.1002/2015JB012163
Liu Z J, Klinger Y, Xu X, et al. Millennial Recurrence of Large Earthquakes on the Haiyuan Fault near Songshan, Gansu Province, China[J]. Bulletin of the Seismological Society of America, 2007,97(1B):14-34. doi: 10.1785/0120050118
冉勇康, 焦德成. 海原断裂高湾子地点三维探槽的开挖与古地震研究[J]. 地震地质, 1997,19(2):97-107. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ702.000.htm Washburn Z, Arrowsmith J R, Forman S L, et al. Late Holocene earthquake history of the central Altyn Tagh fault, China[J]. Geology, 2001,29(11):1051-1054. doi: 10.1130/0091-7613(2001)029<1051:LHEHOT>2.0.CO;2
Washburn Z, Arrowsmith J R, Dupont-Nivet G, et al. Paleoseismology of the Xorxol segment of the central Altyn Tagh fault, Xinjiang, China[J]. Annals of Geophysics, 2003,46(5):1015-1034.
徐锡伟, 于贵华, 陈桂华, 等. 青藏高原北部大型走滑断裂带近地表地质变形带特征分析[J]. 地震地质, 2007,29(2):201-217. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ200702001.htm 冉勇康, 王虎, 李彦宝, 等. 中国大陆古地震研究的关键技术与案例解析(1)古地走滑活动断裂的探槽地点, 布设与事件识别标志[J]. 地震地质, 2012,34(2):197-210. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ201202002.htm Lienkaemper J J, Williams P L, Guilderson T P. Evidence for a twelfth large earthquake on the southern Hayward fault in the past 1900 years[J]. Bulletin of the Seismological Society of America, 2010,100(5A):2024-2034. doi: 10.1785/0120090129
Grant Ludwig L, Akciz S O, Noriega G R, et al. Climate-modulated channel incision and rupture history of the San Andreas Fault in the Carrizo Plain[J]. Science, 2010,327(5969):1117-1119. doi: 10.1126/science.1182837
Weldon R J, Fumal T E, Biasi G P, et al. Past and future earthquakes on the San Andreas Fault[J]. Science, 2005,308(5724):966-967. doi: 10.1126/science.1111707
Zielke O, Arrowsmith J R, Grant Ludwig L, et al. Slip in the 1857 and earlier large earthquakes along the Carrizo Plain, San Andreas Fault[J]. Science, 2010,327(5969):1119-1122. doi: 10.1126/science.1182781
McGill S F, Sieh K. Surficial offsets on the central and eastern Garlock fault associated with prehistoric earthquakes[J]. Journal of Geophysical Research, 1991,96(B13):21597-21621. doi: 10.1029/91JB02030
Klinger Y, Etchebes M, Tapponnier P, et al. Characteristic slip for five great earthquakes along the Fuyun fault in China[J]. Nature Geoscience, 2011,4(6):389-392. doi: 10.1038/ngeo1158
Ren Z, Zhang Z, Chen T, et al. Clustering of offsets on the Haiyuan fault and their relationship to paleoearthquakes[J]. Geological Society of America Bulletin, 2015,128(1/2):3-18.
Wesnousky S G. Displacement and Geometrical Characteristics of Earthquake Surface Ruptures:Issues and Implications for SeismicHazard Analysis and the Process of Earthquake Rupture[J]. Bulletin of the Seismological Society of America, 2008,98(4):1609-1632. doi: 10.1785/0120070111
刘静, 陈涛, 张培震, 等. 机载激光雷达扫描揭示海原断裂带微地貌的精细结构[J]. 科学通报, 2013,58(1):41-45. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB201301003.htm Sawer T, Briggs R, Ramelli A. Paleoseismic investigation of the Mo-hawk Valley fault zone, Sierra County, northeastern California. U.S. Geological Survey Final Technical Report, 2013.
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