Geochemistry, LA-ICP-MS zircon U-Pb ages of the Meicaogou ophiolite in East Kunlun, and its geological significance
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摘要:
重点介绍了没草沟蛇绿岩岩石组合、地球化学特征等，并对该蛇绿岩构造背景进行了讨论。该蛇绿岩位于青海省格尔木市，构造上处于东昆仑复合造山带西段，岩石组合由变质基性玄武岩及少量辉绿岩、辉长岩、变质橄榄岩、辉橄岩等组成。岩石主量和微量元素特征显示该蛇绿岩与俯冲无关，属正常洋中脊型玄武岩。前人开展的地质调查表明，该蛇绿岩形成于晚奥陶世。通过对没草沟蛇绿岩中玄武岩和辉长岩进行LA-ICP-MS锆石U-Pb测年，分别获得了488.2±2.1Ma和500.8±2.2 Ma的年龄数据，确定该蛇绿岩形成时代为中寒武世-早奥陶世。该同位素年龄的获得填补了该地区蛇绿岩无时代依据的空白，同时反映古特斯洋在本区的残留。综合区域地质特征认为，没草沟蛇绿岩早期为初始洋盆环境，晚期有洋脊扩张中心环境的玄武岩形成。寒武纪早期是洋盆发育的全盛期，奥陶纪晚期洋壳发生消减，于晚志留世洋盆基本闭合，后期伴有绿片岩相变质作用。
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关键词:
- 没草沟蛇绿岩 /
- 地球化学 /
- LA-ICP-MS锆石U-Pb年龄 /
- 构造意义
Abstract:This paper mainly introduces the rock assemblage and geochemical characteristics of the Meicaogou ophiolite and attempts to discuss the tectonic background of the ophiolite which is located in Golmud City of Qinghai Province and lies in the western part of the East kunlun composite orogenic belt. The rock association is composed of metamorphic basic basalt and a small amount of diabase, gabbro, metamorphic peridotite and augite peridotite. The characteristics of main elements and trace elements indicate that the ophiolite is not related to subduction but belongs to N-MORB. In the past geological survey carried out by previous researchers, it was considered that the ophiolite was formed in Late Ordovician. The LA-ICP-MS zircon U-Pb dating of gabbro and basalt in the Weitogou ophiolite yielded the exact age data of 488.2±2Ma and 501.1±2.2Ma. The isotope data have filled the gaps of the ophiolite data in this area, and reflected the existence of remains of the ancient ocean in this area. The comprehensive regional geological characteristics suggest that the early period of the oceanic basin was at the initial stage, but at the late stage basalt was formed in an oceanic ridge expanding center environment. The Early Cambrian period was the flourishing period of the development of the oceanic basin, the late oceanic crust was formed in the late Ordovician period, and the late Silurian basin was basically closed together with later greenschist facies metamorphism.
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致谢: 研究过程中广泛收集了1:25万和1:5万区域地质调查成果资料，感谢项目组同仁野外生产过程中付出的艰辛劳动，野外运行中祁生胜、常革红、史连昌及长安大学裴先治教授等亲临项目检查指导工作；岩石化学样品和同位素样品分别由武汉矿产资源监督检测中心和天津地质矿产研究所实验室测试完成；青海省地质调查院范桂兰等完成了岩石薄片的分析鉴定，在此表示衷心谢意。
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图 1 东昆仑区域地质背景略图（据参考文献④修改）
1—第四系；2—古近系-新近系；3—侏罗系；4—上三叠统；5—下-中三叠统；6—三叠系巴颜喀拉山群；7—石炭系；8—下泥盆统；9—上泥盆统；10—奥陶系祁漫塔格群；11—下-中寒武统沙松乌拉组；12—蓟县系万保沟群青办食宿站组；13—蓟县系万保沟群温泉沟组；14—蓟县系-待建系狼牙山组；15—古元古界；16—加里东期-印支期中酸性花岗岩；17—石炭系-中二叠统马尔争蛇绿混杂岩；18—寒武系-奥陶系纳赤台蛇绿混杂岩基性火山岩组合；19—寒武系-奥陶系纳赤台蛇绿混杂岩碳酸盐岩组合；20—寒武系-奥陶系纳赤台蛇绿混杂岩中酸性火山岩组合；21—寒武系-奥陶系纳赤台蛇绿混杂岩碎屑岩组合；22—角度不整合界线；23—三级分界断裂；24—一级分界断裂
Figure 1. Regional geological background of East Kunlun region
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图版Ⅰ
a.没草沟蛇绿岩砂岩构造透镜体；b.硅质岩与玄武岩接触关系；c.玄武岩野外露头；d.枕状玄武岩露头；e.没草沟蛇绿岩中变形砾岩特征；f.砾岩露头；g.辉绿岩镜下显微特征（镜下10×10（+））；h.辉长岩镜下显微特征(镜下10×2.5（+））；Act—阳起石；Pl—斜长石；Hb—普通角闪石
图版Ⅰ.
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图 3 青海省格尔木市老道沟没草沟蛇绿构造混杂岩实测地质剖面
1—第四系松散砾石层；2—钠长绿帘石绿泥石片岩；3—辉绿岩；4—辉绿玢岩；5—闪长岩；6—单斜辉橄岩；7—玄武岩；8—岩屑长石砂岩；9—泥质岩屑长石砂岩；10—断层；11—韧性断层；12—岩石化学样品采集位置及编号；Sch—片岩；ss—砂岩；ψ—纯橄榄岩；ν—辉长岩；β—玄武岩
Figure 3. Measured geological section of the Meicaogou ophiolite tectonic melange in Laodaogou, Golmud City Qinghai Province
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图 4 没草沟蛇绿岩AFM（a）和ACM图（b）
Figure 4. AFM(a) and ACM(b) diagrams of the Meicaogou ophiolite
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图 5 没草沟蛇绿岩稀土元素配分图和微量元素株网图
（图例同图 4）
Figure 5. Chondrite-nomalized REE patterns and spidergram of trace elements of the Meicaogou ophiolite
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图 6 研究区玄武岩（样品IXU-Pb02）LA-ICP-MS锆石U-Pb谐和图
Figure 6. LA-ICP-MS zircon U-Pb concordia diagram of basalt (sample IXU-Pb02) in the study area
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图 7 研究区玄武岩（样品IXU-Pb02）锆石阴极发光图像
Figure 7. Cathodoluminescence images of zircons in basalt (sample IXU-Pb02) of the study area
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图 8 研究区辉长岩（样品IXU-Pb04）锆石阴极发光图像
Figure 8. Cathodoluminescence images of zircon in gabbro (sample IXU-Pb04) of the study area
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图 9 研究区辉长岩（样品IXU-Pb04）LA-ICP-MS锆石U-Pb谐和图
Figure 9. LA-ICP-MS zircons U-Pb concordia diagrams of gabbro (sample IXU-Pb04) of the study area
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图 10 没草沟蛇绿岩构造判别图解（图例同图 4）
AⅠ—板内碱性玄武岩；AⅡ—板内拉斑玄武岩；P-MORB—富集型洋中脊玄武岩；WPA—板内拉斑玄武岩；N-MORB—正常洋中脊玄武岩；WPB—板内玄武岩；OFB—洋脊玄武岩；IAB—岛弧玄武岩；CAB—钙碱性玄武岩
Figure 10. Tectonic setting discrimination diagrams of diabases in the Meicaogou ophiolitic mélange
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图 11 没草沟蛇绿岩TiO2-MnO*10-P2O5*10图解（图例同图 4）
OIT—大洋岛屿拉斑玄武岩；MORB—洋中脊玄武岩；OIA—大洋岛屿碱性玄武岩；IAT—岛弧拉斑玄武岩；CAB—钙碱性玄武岩
Figure 11. TiO2-MnO*10-P2O5*10 diagram of the Meicaogou ophiolite
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图 12 没草沟蛇绿岩Nb/Yb-Th/Yb（a）和Nb/Yb-TiO2/Yb（b）图解
（图例同图 4）
Figure 12. Nb/Yb-Th/Yb (a) and Nb/Yb-TiO2/Yb (b) diagrams of the Meicaogou ophiolite
表 1 没草沟蛇绿岩主量元素分析结果
Table 1 Analyses of major elements of the Meicaogou ophiolite
% 序号 岩石名称 样品号 SiO2 TiO2 Al2O3 Fe2O3 FeO MnO MgO CaO Na2O K2O P2O5 H2O CO2 总计 σ TFeO/MgO 1 辉橄岩 6402-1-3* 40.09 0.76 8.34 4.93 7.50 0.18 23.72 5.92 0.13 0.07 0.10 7.97 0.05 99.76 0.07 0.50 2 P13Bb10-1 33.49 0.003 0.04 5.65 0.88 0.16 39.70 0.32 0.10 0.01 0.004 9.78 4.42 99.30 0.00 0.15 3 P13Bb11-1 43.11 0.008 0.42 4.20 2.48 0.10 36.63 0.14 0.13 0.03 0.004 10.79 0.13 99.11 0.01 0.17 4 P13Bb14-1 43.82 0.014 0.05 3.27 2.15 0.10 37.96 0.06 0.12 0.01 0.007 11.68 0.09 99.63 0.00 0.13 5 P13Bb15-1 42.60 0.005 0.17 4.85 2.72 0.10 36.88 0.05 0.13 0.02 0.005 11.80 0.04 99.37 0.01 0.19 6 蛇纹岩 I-17P5GS1-1# 44.30 0.062 0.25 0.29 5.83 0.09 37.88 1.49 0.12 0.04 0.019 4.09 - 99.46 0.01 0.16 7 橄榄岩 I-17P5GS3-1# 40.78 0.01 0.18 5.24 1.56 0.12 38.49 0.96 0.07 0.22 0.01 0.84 - 99.48 0.03 0.16 8 辉长岩 I-17GS1001a# 46.80 1.95 12.19 6.18 10.10 0.24 5.47 11.12 2.41 0.40 0.28 0.96 - 99.10 1.62 2.86 9 IXGS04 51.33 0.62 14.57 1.86 6.05 0.16 7.19 7.90 3.61 0.30 0.10 3.23 2.90 99.82 1.48 1.07 10 辉绿岩 P5DY10-1 48.72 1.04 13.37 2.44 8.05 0.22 9.68 8.17 2.77 0.75 0.11 3.79 0.68 100.13 1.68 1.06 11 P5DY12-1 49.19 1.00 13.79 2.48 6.30 0.20 8.14 10.18 2.8 0.83 0.11 3.20 1.61 100.20 1.66 1.05 12 6402-3-6* 48.62 1.43 16.18 3.43 6.37 0.16 6.15 10.82 3.12 0.32 0.21 2.81 0.22 99.84 1.75 1.54 13 辉绿玢岩 I-17Gs414# 48.37 2.46 13.58 0.64 9.25 0.20 9.80 7.70 3.00 0.86 0.17 3.10 - 99.13 2.19 1.00 14 玄武岩 P5DY1-1 48.39 1.94 12.94 2.99 8.45 0.18 4.47 10.16 1.45 0.80 0.31 3.68 3.95 100.06 0.63 2.49 15 P5DY2-1 45.17 1.58 14.30 3.43 8.65 0.22 5.61 11.45 2.38 0.70 0.22 3.55 2.39 99.93 2.08 2.09 16 IXGS02 50.69 1.59 14.70 3.53 5.80 0.18 5.62 8.97 3.91 0.67 0.16 2.64 1.35 99.81 2.31 1.60 17 P16GS5-1 45.84 1.58 16.97 3.78 7.35 0.19 6.24 12.02 1.83 0.33 0.20 3.39 0.04 99.76 1.10 1.72 18 P16GS9-1 46.98 1.37 17.22 2.56 8.00 0.17 6.62 8.12 3.59 0.28 0.16 3.88 0.77 99.72 2.58 1.56 19 P5GS4-1 51.58 1.70 14.91 2.41 8.60 0.17 5.29 6.03 3.62 0.68 0.25 3.55 0.99 99.78 1.83 2.04 20 I-17P6GS9-1# 41.69 2.17 11.78 2.40 7.36 0.21 3.58 15.22 2.98 0.36 0.24 2.31 - 99.30 3.29 2.66 21 I-17Gs1008a# 46.63 1.60 14.52 3.29 8.46 0.21 7.57 9.18 3.40 0.56 0.17 1.94 - 99.53 2.97 1.51 22 BP15-72-1* 47.53 1.71 13.83 1.83 10.12 0.17 5.09 8.29 3.46 0.86 0.20 3.97 2.72 99.78 2.67 2.31 23 BP15-72-2* 47.18 1.76 15.28 2.00 9.88 0.20 6.49 8.57 2.98 0.34 0.25 4.25 0.58 99.76 1.83 1.80 24 BP15-75-2* 47.08 1.91 12.64 2.05 10.05 0.22 6.28 9.88 2.47 0.04 0.23 4.22 2.72 99.79 0.95 1.89 注：*样品据参考文献②，#样品据参考文献⑤，其余样品为本次研究采集 
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表 2 没草沟蛇绿岩微量和稀土元素分析结果
Table 2 Content of trace elements and REE of the Meicaogou ophiolite
10-6 序号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 La 2.98 0.43 1.42 0.55 0.71 0.56 0.40 11.46 10.67 4.27 5.31 16.68 6.36 12.18 8.78 5.47 9.55 6.87 10.42 8.38 8.43 8.87 8.94 9.24 Ce 7.58 2.72 4.10 2.26 3.55 0.46 0.68 26.17 23.29 10.13 12.04 36.40 15.80 29.50 21.30 13.51 25.15 19.04 24.45 24.17 15.51 21.69 21.63 22.28 Pr 1.25 0.19 0.43 0.11 0.24 0.05 0.09 3.69 3.36 1.71 1.89 5.55 2.24 4.69 3.22 2.42 3.81 2.74 3.85 3.75 2.39 3.46 3.53 3.62 Nd 5.90 0.93 1.68 0.34 0.94 0.08 0.35 4.06 14.91 8.48 9.30 23.61 10.84 22.77 15.95 12.63 18.27 13.51 18.71 18.19 12.52 15.43 16.59 17.20 Sm 1.67 0.28 0.36 0.07 0.21 0.05 0.10 4.12 3.35 2.76 2.83 5.68 3.20 6.51 4.71 3.76 4.87 3.65 5.45 5.24 4.41 4.44 4.60 4.70 Eu 0.73 0.073 0.079 0.012 0.075 0.03 0.03 1.45 1.03 0.91 0.97 1.75 1.18 1.62 1.52 1.21 1.66 1.49 1.55 1.69 1.63 1.33 1.55 1.68 Gd 2.22 0.32 0.31 0.052 0.19 0.05 0.08 4.85 3.18 3.66 3.46 6.71 4.12 7.83 5.74 4.96 5.69 4.11 6.69 6.55 6.11 5.63 5.54 5.68 Tb 0.39 0.067 0.058 0.008 0.031 0.008 0.01 0.86 0.57 0.67 0.63 1.13 0.72 1.39 1.06 0.92 1.14 0.80 1.17 1.19 1.13 0.98 0.98 1.02 Dy 2.59 0.50 0.35 0.048 0.17 0.04 0.08 5.34 3.41 4.57 4.27 7.16 4.62 9.06 6.90 5.94 6.87 4.90 7.80 7.22 7.41 6.32 6.37 5.88 Ho 0.54 0.13 0.075 0.01 0.031 0.007 0.02 1.09 0.69 1.01 0.87 1.47 0.96 1.84 1.44 1.23 1.38 0.96 1.54 1.39 1.59 1.23 1.29 1.25 Er 1.50 0.40 0.22 0.023 0.09 0.01 0.05 3.60 2.04 2.91 2.55 4.08 2.88 5.24 4.04 3.44 4.01 2.76 4.37 4.26 4.80 3.29 3.65 3.36 Tm 0.25 0.06 0.03 0.003 0.013 0.002 0.01 0.51 0.29 0.44 0.38 0.66 0.43 0.76 0.59 0.50 0.60 0.42 0.64 0.643 0.73 0.53 0.59 0.52 Yb 1.52 0.43 0.21 0.019 0.087 0.01 0.04 3.31 1.84 2.75 2.28 4.10 2.69 4.47 3.53 3.02 3.49 2.51 3.87 4.16 4.68 3.24 3.60 3.55 Lu 0.23 0.07 0.028 0.003 0.013 0.002 0.01 0.49 0.27 0.42 0.30 0.60 0.40 0.59 0.44 0.42 0.44 0.33 0.48 0.60 0.70 0.52 0.54 0.53 Y 12.61 3.53 2.22 0.22 0.83 0.60 1.50 26.70 18.19 24.17 22.11 33.42 23.40 44.79 35.88 32.59 35.97 26.01 39.88 47.7 56.50 33.36 30.85 30.59 ∑REE 29.35 6.60 9.35 3.51 6.35 1.36 1.95 71.00 68.90 44.69 47.08 115.58 56.44 108.45 79.22 92.03 122.9 90.1 90.99 87.43 72.04 76.96 79.40 80.51 LREE 20.11 4.62 8.07 3.34 5.73 1.23 1.65 50.95 56.61 28.26 32.34 89.67 39.62 77.27 55.48 39.0 69.31 47.3 64.43 61.42 44.89 55.22 56.84 58.72 HREE 9.24 1.98 1.28 0.17 0.62 0.13 0.30 20.05 12.29 16.43 14.74 25.91 16.82 31.18 23.74 20.43 23.62 16.79 26.56 26.01 27.15 21.74 22.56 21.79 (La/Yb)N 1.32 0.67 4.56 19.52 5.50 37.75 6.74 2.33 3.91 1.05 1.57 2.74 1.59 1.84 1.68 1.22 1.84 1.85 1.82 1.36 1.21 1.85 1.67 1.75 δEu 1.16 0.74 0.71 0.58 1.13 1.82 0.99 0.99 0.95 0.88 0.95 0.87 0.99 0.69 0.89 0.86 0.96 1.17 0.78 0.88 0.96 0.81 0.94 0.99 Sr 16.00 36.86 6.61 9.56 6.17 6.00 20.00 620.0 40.19 109 169 177.0 175 253.1 285.7 274.1 317.0 23.37 174.2 258.0 334.0 155.0 270 245 Rb 3.00 0.91 0.88 1.71 0.96 - - 3.00 5.59 9.98 14.04 5.40 7.80 12.67 7.98 13.75 6.32 5.45 8.20 3.50 5.90 17.00 4.70 1.10 Ba 19.00 13.31 23.80 69.10 13.90 24.00 65.0 78.0 165.2 73.12 181.3 88.00 97.7 98.06 137.6 132.9 48.51 102.3 175.9 49.1 38.00 217.0 81.00 54.00 Th 0.58 0.93 0.26 0.58 0.23 1.00 1.00 1.00 1.93 0.18 0.42 3.30 1.00 1.30 0.81 0.79 1.49 0.86 0.48 0.64 1.00 0.55 0.58 0.76 Ta 0.14 0.03 0.04 0.12 0.06 - - 1.40 0.50 0.62 0.50 0.72 0.50 0.93 1.27 0.42 1.29 0.81 0.79 0.50 0.60 0.24 0.32 0.65 Nb 2.50 0.20 0.30 0.57 0.33 0.08 0.35 4.06 5.02 3.43 4.69 7.10 3.05 10.75 8.50 4.02 9.54 6.91 7.82 10.80 14.20 7.30 8.30 8.70 Zr 125.0 4.00 4.70 3.80 5.50 26.00 10.00 116.0 64.70 68.30 74.4 259.0 90.50 199.6 147.5 113 158.1 112.9 165.6 177 159 179.0 185 216.0 Hf 3.10 0.13 0.19 0.21 0.21 0.50 0.40 4.30 3.53 3.30 3.30 6.90 3.10 6.40 6.20 4.18 5.56 4.11 5.80 4.10 5.70 4.80 4.90 5.70 Cr 1173 2565 2390 1494 2201 589 670 187 212.8 234.8 303.8 161.0 114 193.6 229.7 136.9 216.6 128.9 224.3 156 104 126 217 94.00 Ni 979 2192 2306 1716 2536 - - 53.70 72.26 71.38 112.9 55.00 93.60 76.73 73.05 53.87 66.06 114.7 67.13 82.40 41.40 60.00 81.00 58.00
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表 3 研究区玄武岩和辉长岩LA-ICP-MS锆石U-Th-Pb年龄分析结果
Table 3 LA-ICP-MS zircon U-Th-Pb dating data of basalt and gabbro of the study area
测点 含量/10-6 同位素比值 同位素年龄/Ma Pb U 206Pb/238U 1σ 207Pb/235U 1σ 207Pb/206Pb 1σ 208Pb/232Th 1σ 232Th/238U 1σ 206Pb/238U 1σ 207Pb/235U 1σ 207Pb/206Pb 1σ 玄武岩（样品IXU-Pb02） 1 22 271 0.0787 0.0008 0.622 0.010 0.0573 0.0009 0.0198 0.0001 0.537 0.001 489 5 491 8 503 33 2 26 323 0.0784 0.0008 0.622 0.009 0.0575 0.0007 0.0200 0.0001 0.519 0.001 487 5 491 7 512 29 3 22 258 0.0784 0.0008 0.626 0.010 0.0580 0.0009 0.0200 0.0001 0.678 0.013 486 5 494 8 529 32 4 38 448 0.0789 0.0008 0.622 0.009 0.0572 0.0007 0.0209 0.0001 0.649 0.006 489 5 491 7 499 28 5 14 179 0.0787 0.0009 0.621 0.016 0.0572 0.0013 0.0240 0.0004 0.417 0.001 488 5 490 13 500 51 6 44 532 0.0787 0.0008 0.627 0.009 0.0577 0.0007 0.0223 0.0001 0.508 0.001 489 5 494 7 520 27 7 35 444 0.0783 0.0008 0.618 0.009 0.0572 0.0007 0.0217 0.0001 0.385 0.001 486 5 489 7 501 27 8 31 379 0.0780 0.0008 0.621 0.009 0.0577 0.0007 0.0216 0.0001 0.534 0.003 484 5 490 7 518 27 9 17 205 0.0781 0.0009 0.612 0.013 0.0568 0.0011 0.0214 0.0001 0.517 0.020 485 6 485 10 482 45 10 42 490 0.0779 0.0008 0.621 0.009 0.0578 0.0007 0.0201 0.0001 0.863 0.006 484 5 490 7 522 28 11 37 461 0.0789 0.0009 0.620 0.010 0.0569 0.0008 0.0204 0.0001 0.474 0.003 490 6 490 8 489 32 12 31 387 0.0788 0.0009 0.620 0.009 0.0571 0.0007 0.0202 0.0001 0.455 0.001 489 5 490 7 494 28 13 40 486 0.0785 0.0009 0.614 0.009 0.0567 0.0007 0.0179 0.0001 0.726 0.005 487 5 486 7 481 28 14 34 400 0.0785 0.0008 0.625 0.009 0.0578 0.0007 0.0184 0.0002 0.788 0.019 487 5 493 7 520 28 15 31 370 0.0787 0.0009 0.622 0.011 0.0573 0.0008 0.0182 0.0002 0.776 0.005 489 6 491 8 503 30 16 19 233 0.0783 0.0010 0.621 0.014 0.0575 0.0011 0.0171 0.0002 0.755 0.004 486 6 490 11 510 44 17 12 144 0.0784 0.0009 0.622 0.026 0.0575 0.0022 0.0175 0.0003 0.581 0.005 486 6 491 20 512 83 18 22 273 0.0791 0.0009 0.625 0.011 0.0573 0.0009 0.0191 0.0003 0.426 0.002 491 6 493 9 502 34 19 37 477 0.0788 0.0009 0.622 0.010 0.0572 0.0008 0.0173 0.0001 0.383 0.001 489 6 491 8 501 29 20 17 207 0.0791 0.0009 0.625 0.013 0.0573 0.0012 0.0181 0.0001 0.596 0.002 491 6 493 10 501 44 21 81 1014 0.0791 0.0009 0.622 0.009 0.0570 0.0007 0.0174 0.0001 0.513 0.004 491 5 491 7 493 25 22 18 231 0.0792 0.0011 0.626 0.016 0.0574 0.0012 0.0162 0.0002 0.502 0.003 491 7 494 12 505 45 23 20 226 0.0792 0.0009 0.622 0.012 0.0569 0.0009 0.0167 0.0001 0.978 0.015 492 6 491 9 487 37 24 31 375 0.0789 0.0009 0.623 0.010 0.0572 0.0007 0.0158 0.0001 0.838 0.002 490 6 491 8 500 29 25 31 395 0.0793 0.0008 0.623 0.009 0.0570 0.0007 0.0164 0.0001 0.476 0.001 492 5 492 7 491 28 辉长岩（样品IXU-Pb04） 1 35 427 0.0808 0.0008 0.643 0.009 0.0577 0.0007 0.0226 0.0001 0.412 0.001 501 5 504 7 518 27 2 42 510 0.0808 0.0008 0.636 0.009 0.0571 0.0007 0.0226 0.0001 0.472 0.001 501 5 500 7 497 27 3 43 499 0.0806 0.0008 0.635 0.009 0.0571 0.0007 0.0200 0.0000 0.724 0.007 500 5 499 7 497 28 4 34 387 0.0808 0.0008 0.643 0.010 0.0576 0.0008 0.0214 0.0001 0.709 0.007 501 5 504 8 516 29 5 54 623 0.0810 0.0008 0.640 0.009 0.0573 0.0007 0.0209 0.0000 0.670 0.002 502 5 502 7 503 26 6 93 784 0.0808 0.0010 0.646 0.011 0.0580 0.0008 0.0213 0.0004 2.407 0.078 501 6 506 9 528 30 7 133 1523 0.0811 0.0008 0.640 0.008 0.0572 0.0006 0.0191 0.0001 0.803 0.006 503 5 502 7 500 25 8 13 169 0.0804 0.0009 0.641 0.013 0.0579 0.0011 0.0208 0.0003 0.286 0.001 498 6 503 10 524 42 9 22 266 0.0808 0.0008 0.644 0.010 0.0578 0.0008 0.0187 0.0001 0.522 0.009 501 5 505 8 523 32 10 69 794 0.0807 0.0009 0.639 0.009 0.0574 0.0007 0.0199 0.0005 0.711 0.016 501 5 502 7 506 25 11 23 275 0.0807 0.0009 0.643 0.011 0.0578 0.0009 0.0191 0.0001 0.641 0.008 501 6 504 9 521 34 12 14 171 0.0807 0.0009 0.653 0.014 0.0587 0.0011 0.0203 0.0002 0.502 0.002 500 5 510 11 558 42 13 45 540 0.0808 0.0009 0.644 0.013 0.0578 0.0010 0.0226 0.0003 0.494 0.001 501 6 504 10 521 36 14 39 470 0.0807 0.0010 0.648 0.010 0.0582 0.0008 0.0204 0.0001 0.526 0.001 500 6 507 8 537 29 15 24 282 0.0805 0.0009 0.647 0.010 0.0583 0.0008 0.0223 0.0001 0.623 0.014 499 5 507 8 539 31 16 86 1055 0.0811 0.0008 0.641 0.008 0.0573 0.0007 0.0212 0.0001 0.401 0.001 503 5 503 7 502 25 17 26 317 0.0807 0.0009 0.652 0.012 0.0585 0.0009 0.0216 0.0002 0.433 0.003 500 6 509 9 550 33 18 33 396 0.0809 0.0008 0.642 0.009 0.0576 0.0008 0.0211 0.0001 0.449 0.001 501 5 504 8 514 30 19 31 339 0.0808 0.0009 0.641 0.010 0.0575 0.0008 0.0266 0.0002 0.714 0.007 501 5 503 8 512 31 20 23 278 0.0806 0.0009 0.652 0.011 0.0586 0.0008 0.0195 0.0001 0.612 0.014 500 5 510 8 554 31 21 68 689 0.0811 0.0029 0.647 0.024 0.0578 0.0008 0.0215 0.0021 1.327 0.089 503 18 506 19 522 29 22 30 349 0.0811 0.0009 0.644 0.010 0.0575 0.0008 0.0194 0.0001 0.605 0.007 503 6 504 8 511 30 23 39 446 0.0808 0.0010 0.651 0.016 0.0585 0.0009 0.0202 0.0002 0.709 0.006 501 6 509 12 548 34 24 28 334 0.0807 0.0009 0.637 0.011 0.0572 0.0008 0.0191 0.0001 0.642 0.005 501 6 500 8 499 32 25 21 250 0.0807 0.0010 0.642 0.012 0.0577 0.0010 0.0190 0.0001 0.634 0.003 500 6 504 10 518 36
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