Two episodes of Early Cretaceous magmatism in Geji area of the Lhasa Block, Tibet
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摘要:
邦巴岩体位于拉萨地块西部革吉地区, 由主体花岗岩、花岗闪长岩、闪长质包体及一系列近平行、南北向展布的花岗斑岩脉体组成。野外地质调查和LA-MC-ICP-MS锆石U-Pb定年表明, 革吉地区白垩纪的两期岩浆活动分别发生在131~132Ma和127Ma。早期岩浆作用形成主体花岗岩、花岗闪长岩及闪长质包体, 具有以下特征:①明显富集K、Cs等大离子亲石元素, 亏损Nb、Ti、Zr等高场强元素; ②具有明显的负Eu异常(Eu/Eu*=0.49~0.61)及负Ce异常; ③具负εHf(t)值(-3.2~-0.3)及古老的地壳模式年龄(1.210~1.399Ga); ④初始Sr同位素比值为0.70424~0.71472, εHf(t)值为-5.70~-5.54。晚期岩浆作用形成花岗斑岩脉体, 具有以下特征:①富集K、Cs等大离子亲石元素, 强烈亏损Nb、Ta、Ti等高场强元素; ②基本不具有负Eu异常或具有轻微的负Eu异常(Eu/Eu*=0.74~0.87);③具有更老的Hf同位素地壳模式年龄(1.226~1.576Ga)及更负的大范围变化的εHf(t)值(-6.1~-0.7)。晚期岩浆作用锆饱和温度(777~796℃)及轻稀土元素不饱和温度(794~812℃)均高于早期岩浆的锆饱和温度(661~762℃)及轻稀土元素不饱和温度(750~769℃)。上述特征表明, 两期岩浆作用均为中拉萨地块古老基底部分与地幔物质混染部分熔融的产物, 随着岩浆作用的持续进行, 岩浆中的古老地壳组分增加, 熔体温度也增加, 可能与南向俯冲的班公-怒江洋壳回转驱动的地幔岩浆活动向北迁移有关
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关键词:
- 革吉地区 /
- 邦巴岩体 /
- 两期岩浆作用 /
- 锆饱和温度 /
- 轻稀土元素不饱和温度 /
- LA-MC-ICP-MS锆石U-Pb年龄
Abstract:A series of sub-parallel, NS-trending dikes of rhyolitic composition intruded the Bangba granitic complex in Geji area, western central Lhasa Block. Field investigation and LA-MC-ICP-MS zircon U-Pb dating indicate that two episodes of Early Cretaceous magamatism occurred at 131~132Ma and 127Ma respectively in this area. Earlier episode magmatism is represented by the formation of the dioritic enclaves and their hosts of granodiorite and granite. The magmatic rocks of this episode are characterized by①enrichment of LILEs(K, Cs) and depletion of HFSEs(Nb, Ti, Zr); ②negative Eu anomalies(Eu/Eu*=0.49~0.61) and negative Ce anomalies; ③negative zircon εHf(t)(-3.2~-0.3) and ancient two stage model ages(1.210~1.399Ga); and(4) unradioenic to radiogenic initial 87Sr/86Sr(0.70424~0.71472), and negative Nd(t)(-5.70~-5.54). The rhyolitic dikes, generated by the second episode of magmatism, are characterized by①enrichment of LILEs(K, Cs) and depletion of HFSEs(Nb, Ti, Zr); ②weak negative Eu anomalies(Eu/Eu*=0.74~0.87); and③highly variable negative zircon εHf(t)(-6.1~-0.7) and more ancient two stage model ages(1.226~1.576Ga). Both the zircon saturation thermometer(777~796℃) and monazite saturation thermometer(794~812℃) yielded slightly higher magma temperature for the rhyolitic dike than the temperatures(661~762℃and 750~769℃) either for granodiotite or for the mafic enclave. Both episodes of magmatism are considered to have been the consequence of mixing of mantle-derived magma with the mag-ma derived from melting of ancient continental crust, which might have resulted from roll-back of southward subduction of the Ban-gong-Nujiang oceanic lithosphere.
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致谢: 中国地质大学（北京）地球科学与资源学院张岚同学提供了相关图鉴，中国地质科学院地质研究所董汉文博士在成文过程中给予帮助，审稿人提出诸多宝贵修改意见，在此一并表示感谢。
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图 1 中拉萨地块西部区域地质构造简图(a)和革吉地区地质图及采样位置（b）
BNSZ—班公湖-怒江洋缝合带；SNMZ—狮泉河-纳木错蛇绿混杂岩带；LMF—洛巴堆-米拉山断裂带
Figure 1. Geological-tectonic outline map of the western central Lhasa (a) and subterrane geological map of the Geji area(b)
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图 2 邦巴岩体花岗闪长岩（T0379-B）、闪长质包体（T0379-A）、花岗斑岩脉体（T0379-10）锆石阴极发光照片
Figure 2. Cathodoluminescence (CL) images showing the texture, spot, and respective age of zircon U/Pb dating of sample T0379-B, T0379-A and T00379-10
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图 3 邦巴岩体花岗闪长岩（T0379-B）、闪长质包体（T0379-A）、花岗斑岩脉体(T0379-10)的锆石U-Pb谐和图和206Pb/238U年龄图
Figure 3. U-Pb concordia diagram and 206Pb/238U age plot of the zircons in sample T0379-B, T0379-A and T00379-10, respectively
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表 1 邦巴岩体花岗闪长岩、闪长质包体和花岗斑岩脉的LA-MC-ICP-MS锆石U-Th-Pb定年数据
Table 1 LA-MC-ICP-MS zircon U-Th-Pb isotopic data of the Bangba complex
测试点 Pb/10-6 Th/10-6 U/10-6 Th/U 207Pb/206Pb ±% 207Pb/235U ±% 206Pb/238U ±% 误差相
关系数207Pb/235U
年龄/Ma206Pb/238U
年龄/Ma和谐
度/%花岗闪长岩（T0379-B） 1 2.77 93.80 138.24 0.679 0.05105 0.00094 0.14659 0.0029 0.02087 0.00022 0.53 138.9 2.6 133.2 1.4 95 2 6.67 149.64 228.21 0.656 0.04956 0.00069 0.13898 0.0021 0.02037 0.00017 0.54 132.1 1.9 130.0 1.1 98 3 3.11 115.86 173.28 0.669 0.05034 0.00078 0.14336 0.0023 0.02071 0.00017 0.49 136.0 2.1 132.2 1.1 97 4 7.08 217.83 331.76 0.657 0.05010 0.00059 0.14434 0.0018 0.02095 0.00017 0.63 136.9 1.6 133.7 1.1 97 5 2.98 165.13 191.08 0.864 0.04954 0.00075 0.14220 0.0024 0.02082 0.00019 0.53 135.0 2.1 132.8 1.2 98 6 4.72 228.93 303.53 0.754 0.04919 0.00061 0.13917 0.0021 0.02052 0.00017 0.57 132.3 1.8 130.9 1.1 98 7 4.72 146.63 204.29 0.718 0.04975 0.00081 0.14000 0.0024 0.02047 0.00020 0.58 133.0 2.2 130.6 1.3 98 8 5.53 134.01 169.15 0.792 0.05026 0.00087 0.14494 0.0028 0.02096 0.00022 0.55 137.4 2.5 133.7 1.4 97 9 2.46 107.61 166.25 0.647 0.05148 0.00086 0.14933 0.0031 0.02108 0.00029 0.67 141.3 2.7 134.5 1.8 95 10 7.90 226.39 229.82 0.985 0.05120 0.00088 0.14532 0.0031 0.02067 0.00034 0.77 137.8 2.8 131.9 2.2 95 11 6.53 96.22 139.08 0.692 0.05016 0.0010 0.14478 0.0037 0.02095 0.00034 0.64 137.3 3.3 133.6 2.2 97 12 4.34 116.01 168.58 0.688 0.04982 0.0011 0.14280 0.0042 0.02096 0.00050 0.80 135.5 3.7 133.7 3.1 98 13 6.48 157.75 214.20 0.736 0.04928 0.00088 0.14097 0.0037 0.02081 0.00042 0.76 133.9 3.3 132.8 2.6 99 14 2.65 85.09 134.24 0.634 0.05100 0.0012 0.14873 0.0042 0.02126 0.00044 0.73 140.8 3.7 135.6 2.8 96 15 3.64 64.36 106.94 0.602 0.04767 0.0011 0.13738 0.0042 0.02089 0.00044 0.68 130.7 3.7 133.2 2.8 98 16 5.64 123.09 170.34 0.723 0.05005 0.0010 0.14379 0.0035 0.02094 0.00036 0.70 136.4 3.1 133.6 2.2 97 17 8.38 251.63 288.51 0.872 0.05105 0.00059 0.14808 0.0029 0.02102 0.00032 0.80 140.2 2.5 134.1 2.1 95 18 6.78 126.73 190.71 0.665 0.04939 0.00077 0.14262 0.0033 0.02094 0.00034 0.70 135.4 2.9 133.6 2.1 98 19 3.40 133.10 174.85 0.761 0.05046 0.00091 0.14467 0.0033 0.02087 0.00034 0.73 137.2 2.9 133.2 2.2 97 闪长质包体（T0379-A） 1 9.2 257.3 305.9 0.841 0.05116 0.00060 0.14611 0.0019 0.02074 0.00016 0.61 138.5 1.7 132.3 1.0 95 2 3.8 61.8 121.2 0.510 0.04891 0.0010 0.13770 0.0029 0.02047 0.00017 0.39 131.0 2.6 130.6 1.1 99 3 8.1 127.9 174.4 0.734 0.05022 0.00096 0.14171 0.0029 0.02048 0.00018 0.44 134.6 2.6 130.7 1.2 97 4 16.9 532.3 466.7 1.140 0.04950 0.00041 0.13949 0.0014 0.02045 0.00014 0.65 132.6 1.3 130.5 0.9 98 5 8.1 224.4 294.6 0.762 0.04947 0.00063 0.13937 0.0023 0.02042 0.00021 0.62 132.5 2.1 130.3 1.3 98 6 5.0 104.9 158.3 0.663 0.04901 0.0010 0.13759 0.0029 0.02045 0.00024 0.54 130.9 2.6 130.5 1.5 99 7 11.4 431.4 324.3 1.330 0.04863 0.00071 0.13650 0.0027 0.02038 0.00029 0.73 129.9 2.4 130.0 1.8 99 8 9.8 231.3 294.5 0.785 0.04973 0.00086 0.13861 0.0036 0.02032 0.00044 0.84 131.8 3.2 129.7 2.8 98 9 5.7 190.7 224.5 0.849 0.05008 0.00077 0.14305 0.0032 0.02077 0.00036 0.78 135.8 2.9 132.5 2.3 97 10 11.5 412.0 432.0 0.954 0.05162 0.00064 0.14611 0.0035 0.02066 0.00045 0.91 138.5 3.1 131.8 2.8 95 11 1.9 86.5 132.5 0.652 0.04884 0.0012 0.14195 0.0042 0.02130 0.00045 0.71 134.8 3.8 135.9 2.9 99 12 12.5 349.5 405.6 0.862 0.04970 0.00060 0.14174 0.0028 0.02069 0.00032 0.79 134.6 2.5 132.0 2.0 98 13 2.9 124.4 164.8 0.755 0.04918 0.0011 0.13727 0.0034 0.02037 0.00033 0.66 130.6 3.0 130.0 2.1 99 14 4.2 183.6 228.4 0.804 0.05152 0.0011 0.14744 0.0035 0.02087 0.00034 0.68 139.6 3.1 133.1 2.1 95 15 2.2 74.7 105.1 0.711 0.05121 0.0013 0.14617 0.0040 0.02077 0.00031 0.54 138.5 3.6 132.5 2.0 95 16 17.8 585.4 516.9 1.133 0.04959 0.00048 0.14132 0.0023 0.02069 0.00028 0.85 134.2 2.0 132.0 1.8 98 17 6.8 222.9 248.0 0.899 0.05041 0.00066 0.14414 0.0032 0.02068 0.00034 0.75 136.7 2.8 131.9 2.2 96 18 5.0 168.3 182.8 0.921 0.05130 0.00082 0.14874 0.0035 0.02110 0.00038 0.77 140.8 3.1 134.6 2.4 95 花岗斑岩脉(T0379-10) 1 100.7 277.3 259.2 1.070 0.04812 0.00048 0.13336 0.0021 0.02009 0.00022 0.68 126.7 1.6 125.9 0.9 99 2 199.6 498.3 382.2 1.304 0.04928 0.00043 0.13687 0.0017 0.02014 0.00018 0.73 128.2 1.0 126.2 0.8 98 3 64.5 185.3 149.2 1.242 0.04916 0.00034 0.13495 0.0011 0.01991 0.00010 0.59 127.5 1.0 126.2 0.5 98 4 106.4 292.0 169.1 1.727 0.04892 0.00063 0.13289 0.0018 0.01972 0.00015 0.54 127.3 1.0 127.1 0.6 99 5 47.3 143.6 158.2 0.908 0.04872 0.00041 0.13361 0.0012 0.01991 0.00009 0.55 128.5 1.0 127.1 0.6 99 6 69.0 188.5 150.9 1.250 0.04911 0.00038 0.13381 0.0011 0.01978 0.00008 0.52 130.6 0.9 127.3 0.7 99 7 65.7 187.0 139.8 1.338 0.04944 0.00035 0.13462 0.0011 0.01977 0.00012 0.73 129.8 0.9 128.1 0.7 98 8 17.9 59.8 61.4 0.974 0.04842 0.00096 0.13360 0.0025 0.02007 0.00016 0.43 127.3 2.2 128.1 1.0 99 9 117.8 240.2 260.2 0.923 0.04930 0.00028 0.13640 0.0011 0.02007 0.00011 0.69 129.9 1.6 128.1 1.6 98 10 72.0 154.7 170.3 0.909 0.04897 0.00037 0.13560 0.0011 0.02010 0.00010 0.62 127.1 1.9 128.2 1.4 99 11 159.8 343.8 265.3 1.296 0.04993 0.00028 0.13729 0.0010 0.01995 0.00011 0.74 129.1 1.0 128.3 0.7 97 12 124.4 257.7 183.7 1.403 0.04942 0.00061 0.13650 0.0018 0.02008 0.00025 0.92 130.3 1.5 128.6 1.2 98 13 70.5 147.2 129.9 1.133 0.04975 0.00039 0.13841 0.0013 0.02019 0.00012 0.64 131.6 1.1 128.9 0.7 97 
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表 2 邦巴岩体花岗岩、花岗闪长岩、闪长质包体和花岗斑岩脉的主量、微量、稀土元素及Sr-Nd同位素组成
Table 2 Major, trace and rare earth element and Sr-Nd isotope compositions of the Bangba complex
样号 T0379-A T0379-B T0379-C T0379-10A T0379-10B T0379-10C T0379-10E 岩性 闪长质包体 花岗闪长岩 花岗岩 花岗斑岩 主量元素/% SiO2 58.89 69.62 74.50 69.72 70.49 69.03 72.05 TiO2 0.67 0.32 0.20 0.38 0.36 0.39 0.31 Al2O3 16.97 14.70 13.01 14.69 14.81 14.58 13.84 FeO 3.57 1.29 0.45 2.21 1.87 1.44 0.99 Fe2O3 2.84 1.45 1.16 0.90 1.33 1.73 1.75 MnO 0.22 0.06 0.03 0.08 0.09 0.08 0.04 MgO 3.52 1.00 0.69 1.39 1.21 1.49 0.88 CaO 3.44 3.12 1.07 0.91 1.01 1.02 0.88 Na2O 3.97 3.55 3.22 4.91 4.92 4.37 3.95 K2O 2.46 3.11 4.01 2.82 2.67 3.18 3.88 P2O3 0.18 0.08 0.07 0.10 0.10 0.10 0.09 烧失量 2.23 0.94 1.07 1.69 1.62 2.07 1.27 ∑ 98.96 99.24 99.48 99.80 100.48 99.48 99.93 微量元素/10-6 B 12.5 6.60 5.80 3.52 6.88 5.25 3.75 Sc 18.0 6.53 0.59 8.83 8.35 8.08 6.56 V 152 50.8 7.17 55.7 57.2 57.4 43.0 Cr 15.7 5.5 0.56 12.8 5.23 9.14 41.6 Ni 9.98 3.02 0.31 5.00 0.63 2.17 21.5 Co 14.6 5.04 0.73 7.41 7.32 7.67 6.54 Cu 8.59 3.66 0.79 7.34 4.37 4.47 5.83 Zn 87.2 30.1 5.70 47.9 49.1 60.5 38.3 Ga 18.1 14.8 3.47 15.4 16.0 16.9 14.2 Rb 156 132 165 98.5 82.5 110 144 Sr 191 181 108 116 96.4 111 104 Y 37.9 19.9 3.59 16.4 15.6 15.8 17.4 Zr 108 134 27.7 134 134 139 165 Nb 11.0 6.10 1.84 6.93 7.03 7.93 8.01 Sn 3.44 1.41 0.22 1.27 1.34 1.48 1.41 Cs 6.63 2.81 0.85 3.77 3.44 5.49 4.51 Ba 480 439 254 585 495 559 665 Hf 3.21 3.69 3.88 3.92 3.84 3.94 4.48 Ta 0.89 0.76 1.24 0.72 0.71 0.81 0.85 W 0.80 0.67 0.80 1.15 1.82 1.66 1.63 Tl 0.51 0.48 0.68 0.64 0.60 0.76 0.92 微量元素/10-6 Pb 7.25 11.3 16.92 5.90 10.2 8.37 14.6 Bi 0.07 0.03 0.12 0.22 0.09 0.24 0.10 Th 8.15 18.9 16.48 15.2 14.9 16.0 19.2 U 2.13 2.05 1.60 2.09 1.76 1.88 2.55 稀土元素/10-6 La 12.7 35.3 18.8 29.1 25.0 23.3 31.5 Ce 29.3 26.9 14.1 49.0 41.9 39.4 52.1 Pr 4.63 6.68 4.04 5.17 4.56 4.65 5.84 Nd 19.1 22.0 13.0 17.6 15.2 16.1 18.1 Sm 5.01 3.81 2.24 3.12 2.85 2.95 3.17 Eu 0.92 0.69 0.40 0.80 0.68 0.68 0.66 Gd 5.20 3.26 2.88 2.59 2.34 2.43 2.43 Tb 0.92 0.49 0.32 0.49 0.41 0.41 0.48 Dy 6.18 3.03 2.04 2.72 2.51 2.46 2.71 Ho 1.29 0.64 0.44 0.57 0.52 0.51 0.55 Er 4.03 2.02 1.40 1.74 1.70 1.68 1.80 Tm 0.68 0.31 0.24 0.25 0.24 0.23 0.27 Yb 4.70 2.17 2.00 1.79 1.89 1.79 1.96 Lu 0.72 0.36 0.32 0.29 0.29 0.28 0.31 ∑REE 95.38 107.66 62.24 115.23 100.09 96.87 121.88 K2O/Na2O 0.62 0.88 1.25 0.57 0.54 0.73 0.98 A/CNK 1.09 0.98 1.11 1.14 1.15 1.16 1.11 A/NK 1.83 1.58 1.33 1.31 1.34 1.36 1.28 Mg# 50.60 40.72 45.16 45.07 41.29 46.99 37.95 Eu/Eu* 0.56 0.61 0.49 0.87 0.82 0.79 0.74 Ce/Ce* 0.90 0.41 0.38 0.94 0.92 0.89 0.90 (La/Yb)N 1.901 11.44 6.598 11.44 9.304 9.156 11.30 (La/Gd)N 2.059 9.131 5.493 9.474 9.009 8.085 10.93 (Gd/Yb)N 0.923 1.253 1.201 1.207 1.033 1.132 1.034 Rb-Sr和Sm-Nd同位素 87Sr/86Sr 0.71269 0.71229 0.71636 ±2σ 13 13 17 l43Nd/l44Nd 0.51231 0.51227 0.51226 ±2σ 10 10 5 εNd(t) -5.38 -5.54 -5.70
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表 3 邦巴岩体花岗闪长岩、闪长质包体和花岗斑岩脉的锆石Hf同位素组成
Table 3 Zircon Hf isotope compositions of the Bangba complex
测试点 206Pb/238U年龄/Ma 176Yb/177Hf ±2σ 176Lu/177Hf ±2σ 176Hf/177Hf ±2σ 176Hf/177Hf（t） εHf(t) TDM1/Ma TDM2/Ma fs 花岗闪长岩（T0379-B） 1 132.2 0.045554 0.00072 0.001034 0.000017 0.282602 0.000015 0.282600 -3.2 920 1391 -0.969 2 130.6 0.069628 0.00052 0.001624 0.000012 0.282607 0.000018 0.282603 -3.1 928 1384 -0.951 3 130.0 0.050262 0.00030 0.001208 0.000008 0.282608 0.000017 0.282605 -3.1 917 1381 -0.964 4 133.6 0.059546 0.00052 0.001397 0.000016 0.282613 0.000015 0.282610 -2.8 914 1367 -0.958 5 133.2 0.060140 0.0019 0.001424 0.000038 0.282624 0.000017 0.282620 -2.4 899 1344 -0.957 6 134.5 0.050629 0.00022 0.001233 0.000007 0.282640 0.000016 0.282637 -1.8 872 1305 -0.963 7 133.2 0.049784 0.00092 0.001236 0.000018 0.282646 0.000018 0.282643 -1.6 863 1293 -0.963 8 133.7 0.050127 0.00058 0.001199 0.000011 0.282648 0.000017 0.282645 -1.5 859 1287 -0.964 9 133.6 0.066195 0.00044 0.001566 0.000015 0.282650 0.000015 0.282646 -1.5 866 1286 -0.953 10 131.9 0.088689 0.0020 0.002018 0.000045 0.282654 0.000018 0.282649 -1.4 870 1279 -0.939 11 133.2 0.043830 0.00027 0.001021 0.000004 0.282653 0.000016 0.282650 -1.4 849 1277 -0.969 12 130.9 0.076807 0.0014 0.001796 0.000031 0.282660 0.000016 0.282655 -1.3 857 1267 -0.946 13 132.8 0.060527 0.0011 0.001317 0.000025 0.282663 0.000018 0.282660 -1.0 841 1255 -0.96 14 133.7 0.041696 0.0012 0.001059 0.000032 0.282667 0.000019 0.282664 -0.9 830 1245 -0.968 15 135.6 0.046686 0.0014 0.001108 0.000031 0.282675 0.000016 0.282672 -0.6 820 1227 -0.967 16 133.7 0.048985 0.00032 0.001154 0.000005 0.282681 0.000016 0.282679 -0.4 811 1213 -0.965 17 134.1 0.065242 0.00089 0.001538 0.000025 0.282682 0.000017 0.282679 -0.4 818 1212 -0.954 18 133.6 0.043276 0.00070 0.001010 0.000018 0.282682 0.000016 0.282680 -0.3 807 1210 -0.97 19 132.8 0.048099 0.00019 0.001076 0.000010 0.282683 0.000017 0.282680 -0.3 808 1210 -0.968 闪长质包体〔T0379-A) 1 130.0 0.050014 0.0019 0.001266 0.000041 0.282600 0.000015 0.282597 -3.3 930 1399 -0.962 2 130.5 0.051841 0.00029 0.001197 0.000010 0.282605 0.000015 0.282602 -3.2 921 1388 -0.964 3 130.3 0.046041 0.00038 0.001156 0.000018 0.282610 0.000017 0.282607 -3.0 913 1376 -0.965 4 134.6 0.049593 0.00022 0.001194 0.000011 0.282618 0.000016 0.282615 -2.6 902 1355 -0.964 5 133.1 0.058789 0.00095 0.001390 0.000023 0.282630 0.000016 0.282626 -2.2 890 1331 -0.958 6 132.5 0.085914 0.0027 0.001971 0.000053 0.282635 0.000017 0.282630 -2.1 897 1323 -0.941 7 130.6 0.051762 0.00054 0.001220 0.000010 0.282635 0.000016 0.282632 -2.1 878 1318 -0.963 8 130.5 0.060702 0.00043 0.001519 0.000018 0.282636 0.000018 0.282633 -2.1 884 1318 -0.954 9 132.3 0.046914 0.00020 0.001118 0.000004 0.282634 0.000017 0.282631 -2.1 877 1319 -0.966 10 132.5 0.043004 0.00062 0.001020 0.000016 0.282639 0.000014 0.282636 -1.9 869 1308 -0.969 11 132.0 0.066363 0.0011 0.001509 0.000023 0.282648 0.000015 0.282644 -1.6 867 1291 -0.955 12 132.0 0.075871 0.0021 0.001736 0.000047 0.282652 0.000019 0.282648 -1.5 867 1283 -0.948 13 130.7 0.052142 0.00063 0.001240 0.000017 0.282663 0.000016 0.282660 -1.1 840 1257 -0.963 14 135.9 0.070707 0.00015 0.001655 0.000005 0.282662 0.000017 0.282657 -1.1 851 1259 -0.95 15 131.8 0.073036 0.0015 0.001686 0.000033 0.282668 0.000016 0.282664 -0.9 843 1247 -0.949 16 129.7 0.058873 0.00068 0.001392 0.000012 0.282669 0.000014 0.282666 -0.9 834 1244 -0.958 17 130.0 0.045546 0.00027 0.001093 0.000009 0.282669 0.000016 0.282666 -0.9 828 1243 -0.967 18 131.9 0.077191 0.00049 0.001779 0.000017 0.282683 0.000016 0.282678 -0.4 824 1214 -0.946 花岗斑岩脉(T0379-10) 1 128.3 0.106694 0.0016 0.002091 0.000024 0.282679 0.000017 0.282674 -0.7 836 1226 -0.937 2 127.1 0.086637 0.00032 0.001769 0.000003 0.282659 0.000020 0.282654 -1.4 858 1271 -0.947 3 128.1 0.087804 0.0011 0.001741 0.000015 0.282650 0.000018 0.282646 -1.6 869 1289 -0.948 4 127.1 0.102770 0.0014 0.002112 0.000025 0.282615 0.000017 0.282610 -3.0 930 1372 -0.936 5 128.6 0.125663 0.0053 0.002165 0.000076 0.282610 0.000021 0.282605 -3.1 938 1381 -0.935 6 127.3 0.089482 0.00051 0.001741 0.000014 0.282584 0.000017 0.282580 -4.0 965 1439 -0.948 7 126.2 0.087861 0.0033 0.001760 0.000057 0.282584 0.000019 0.282580 -4.0 965 1440 -0.947 8 128.1 0.063003 0.0014 0.001274 0.000024 0.282582 0.000017 0.282579 -4.0 956 1441 -0.962 9 126.2 0.138659 0.0030 0.002770 0.000050 0.282583 0.000016 0.282576 -4.2 994 1447 -0.917 10 128.4 0.144605 0.00089 0.002449 0.000019 0.282553 0.000020 0.282547 -5.1 1028 1511 -0.926 11 127.7 0.117140 0.00042 0.002097 0.000006 0.282549 0.000021 0.282544 -5.3 1024 1519 -0.937 12 128.2 0.111647 0.0041 0.001961 0.000068 0.282523 0.000020 0.282519 -6.1 1058 1576 -0.941 13 128.1 0.231967 0.0020 0.004219 0.000016 0.282538 0.000028 0.282528 -5.8 1104 1553 -0.873
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