Geochemistry, chronology and zircon Lu-Hf isotopic characteristics of the Miren rocks in Riduo area of east part of Southern Gangdise belt and their geological significance
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摘要:
日多地区米忍岩体位于冈底斯南带东段，2件锆石U-Pb测年样品显示其形成年龄为54.9±1.6Ma和48.6±0.5Ma，岩石SiO2含量为60.18%~71.53%，全碱含量为5.85%~7.49%，K2O/Na2O值为0.58~1.05，里特曼指数在1.79~2.30之间，属钙碱性岩石，A/CNK值为0.85~0.95，投图显示为准铝质岩石，具有I型花岗岩的特征。岩石轻稀土元素及大离子亲石元素（Rb、K、Ba、Th、U）相对富集，重稀土及高场强元素（Nb、P、Hf、Ti）相对亏损，弱负Eu异常，具火山弧岩浆岩地球化学特征。176Hf/177Hf平均值为0.282945，Hf同位素二阶段模式年龄较年轻（613~719Ma），εHf(t)值为2.74~10.47，表明其岩浆源区以新生地壳的部分熔融为主或有地幔物质参与了成岩过程，据C/MF-A/MF投图分析，可能为基性或铁镁质岩浆底侵，导致中下地壳的物质发生熔融，这些特征均表明，日多地区始新世花岗闪长岩的形成可能与新特提斯洋板片的回转、断离有关。
Abstract:The Miren rock in the Riduo Area is located in the eastern part of southern Gangdise belt. Zircon U-Pb dating of two samples reveals that the formation ages are 54.9±1.6Ma and 48.6±0.5Ma, and SiO2 content of the rock is 60.18%~71.53%, total alkali content is 5.85%~7.49%, K2O/Na2O ratio is 0.58~1.05, and Liteman index (σ) is 1.79~2.30, suggesting calc-alkaline rocks, with A/CNK value being 0.85~0.95. The diagram shows a quasi-aluminous rock with characteristics of type I granite. The light rare earth and large lithosphere ionic elements (Rb, K, Ba, Th, and U) are relatively enriched, and the characteristics of heavy rare earth and high-field strength elements (Nb, P, Hf, Ti) are relatively depleted with weak negative Eu anomalies, showing features of volcanic arc magma. The ratio of 176Hf/177Hf is 0.282819~0.283036, 0.282945 on average. The Hf isotope two-stage model is younger (613~719Ma) and the εHf(t) value is between 2.74 and 10.47, indicating that the magma source area was part of the new genetic crust. Melting or mantle material was involved in the rock-forming process. According to C/MF-A/MF mapping analysis, it may be basic or iron-magnesian magmatic intrusion, resulting in melting of material in the middle and lower crust. The formation of the Riduo granodiorite may have been related to the rotation and separation of the Neo-Tethys plate.
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Keywords:
- Gangdise /
- Riduo area /
- granite /
- zircon U-Pb dating /
- Hf isotope
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致谢: 感谢陕西省矿产地质调查中心边小卫、李新林等教授级高工和陕西省区研院韩芳林教授级高工对本项目野外工作的热情指导，陕西省地质规划研究中心周斌、陕西省矿产地质调查中心韩奎两位工程师在撰写过程给予很大帮助，审稿专家提出很多宝贵意见，在此一并表示感谢。
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图 1 日多地区大地构造位置（a）及区域地质简图（b）（据参考文献①修改）
JSSZ—金沙江缝合带；LSSZ—龙木错-双湖缝合带；BNSZ—班公湖-怒江缝合带；SNMZ—狮泉河-纳木错蛇绿混杂岩带；LMF—洛巴堆-米拉山断裂带；YZSZ—印度-雅鲁藏布江缝合带；STDS—藏南拆离系；Pt1-2N—念青唐古拉岩群；J1-2y—叶巴组；J-K—包括多底沟组、林布宗组、楚木龙组、塔克那组和设兴组；K1b—比马组；E1-2L—林子宗群；Q—第四系；★—测年样位置及年龄；F1—米拉山口逆冲推覆带；F2—沃卡脆韧性剪切带
Figure 1. Tectonic position (a) and geological map (b) of Riduo area
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图 2 日多地区米忍岩体野外露头（a、b）及镜下照片（c、d）
Pl—斜长石；Pth—条纹长石；Kfs—钾长石；Qtz—石英；Am—角闪石；Bt—黑云母
Figure 2. Outcrop (a, b) and microscopic (c, d) photos of Miren rocks in Riduo area
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图 6 日多地区米忍岩体锆石阴极发光（CL）图像及测点位置
（实线圆圈表示U-Pb测点，虚线圆圈表示Lu-Hf测点，数字代表测点号及206Pb/238U年龄（Ma））
Figure 6. CL images and analyzing locations of zircons from Miren rocks in Riduo area
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图 7 日多地区米忍岩体锆石U-Pb谐和图（a）及206Pb/238U年龄加权平均值图(b)
Figure 7. Zircon concordia diagram (a) and 206Pb/238U age weighted average value diagram (b) of Miren rocks in Riduo area
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图 8 日多地区米忍岩体锆石t-εHf(t)图解（a）和tDM2统计直方图（b）
Figure 8. Diagram of t-εHf(t) (a) and histogram of tDM2(b) for Miren rocks in Riduo area
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图 9 日多地区米忍岩体C/MF-A/MF源区判别图解（a）及构造环境判别图解（b、c）
WPG—板内花岗岩；VAG—火山弧花岗岩；syn-COLG—同碰撞花岗岩；ORG—洋脊花岗岩
Figure 9. C/MF-A/MF discrimination diagram(a)and tectonic discrimination diagrams(b, c)of Miren rocks in Riduo area
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图 10 冈底斯东段始新世构造-岩浆演化模式图(据参考文献[44]修改)
Figure 10. Eocene tectonic-magmatic evolution pattern of the eastern Gangdise belt
表 1 日多地区米忍岩体主量、微量和稀土元素分析数据
Table 1 Major, trace and rare earth element compositions of Miren rocks in Riduo area
样品编号 D4253/1 D0204/1 D6015/1 D2271/1 D0499/1 D6422/1 D6436/1 SiO2 62.15 67.46 71.53 62.41 63.69 60.18 63.88 Al2O3 15.93 14.83 13.40 15.27 15.34 16.17 15.25 TFe2O3 6.47 4.46 3.22 6.13 5.89 7.04 6.04 MgO 2.35 1.47 0.77 2.60 2.44 2.88 2.46 CaO 4.96 2.95 2.73 4.70 4.47 5.33 4.45 Na2O 3.66 3.88 4.71 3.75 3.14 3.48 3.15 K2O 2.19 3.61 2.71 2.93 3.26 2.63 3.31 P2O5 0.19 0.16 0.08 0.15 0.14 0.24 0.14 MnO 0.13 0.08 0.09 0.12 0.11 0.12 0.11 TiO2 0.81 0.61 0.40 0.59 0.57 0.91 0.59 烧失量 0.79 1.03 0.27 0.63 0.81 0.64 0.71 总计 99.63 100.54 99.91 99.28 99.86 99.62 100.09 K2O/ Na2O 0.60 0.93 0.58 0.78 1.04 0.76 1.05 Σ 1.79 2.29 1.93 2.30 1.98 2.17 2.00 DI 76.88 65.88 65.85 62.48 83.79 59.38 66.3 SI 11.19 16.99 17.29 16.50 6.86 18.53 16.84 A/CNK 0.95 0.91 0.85 0.92 0.86 0.89 0.90 La 30.3 33.9 71.6 24.6 36.2 39.0 37.6 Ce 58.9 67.3 122 49.5 63.9 77.5 69.2 Pr 7.25 7.44 12.8 5.84 7.44 9.51 7.73 Nd 28.0 27.8 43.3 22.2 28.2 36.7 26.3 Sm 5.78 5.12 6.58 4.99 5.4 7.46 5.46 Eu 1.46 1.23 1.58 1.19 1.3 1.83 1.25 Gd 5.2 4.43 5.44 4.34 4.96 6.68 5.06 Tb 0.9 0.69 0.74 0.71 0.75 1.02 0.73 Dy 4.43 4 3.05 3.62 3.9 5.3 3.76 Ho 1.06 0.84 0.68 0.8 0.88 1.18 0.88 Er 2.68 2.33 1.98 2.14 2.34 3.03 2.25 Tm 0.4 0.32 0.32 0.34 0.39 0.49 0.39 Yb 2.75 2.48 2.21 2.33 2.54 3.22 2.47 Lu 0.36 0.4 0.32 0.37 0.4 0.5 0.4 Y 30 24.7 20.6 24.1 25.3 34.5 24.6 P 953 677 515 820 690 1172 587 Sr 386 330 339 347 368 405 355 Ba 428 507 714 483 440 515 400 Zr 177 177 199 84.9 104 221 104 Rb 67.9 106 76.8 93.6 110 81.4 113 Th 7.07 8.2 13.8 10.5 31.9 11.6 42.2 U 1.31 1.7 0.82 3 4.38 2.17 6.87 Nb 8.42 17.8 7.68 13.4 9.12 15.3 9.21 Hf 1.06 6.91 1.1 1.04 1.21 1.53 1.33 Ta 0.82 0.92 0.8 0.72 0.82 0.83 0.77 ΣREE 179.47 182.98 293.2 147.07 183.9 227.92 188.08 LREE/HREE 2.76 3.55 7.30 2.80 3.44 3.08 3.64 (La/Yb)N 9.81 10.22 7.57 7.90 23.24 8.69 10.92 (La/Sm)N 4.27 4.33 3.18 3.38 7.02 3.37 4.45 (Gd/Yb)N 1.48 1.62 1.54 1.56 2.04 1.72 1.69 δEu 0.79 0.77 0.78 0.81 0.81 0.79 0.73 Th/Yb 5.86 22.24 7.98 4.55 11.06 6.38 30.25 注：主量元素含量单位为%，微量和稀土元素含量单位为10-6 
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表 2 日多地区米忍岩体LA-ICP-MS锆石U-Th-Pb同位素分析结果
Table 2 LA-ICP-MS U-Th-Pb isotopic data of zircons from Miren rocks in Riduo area
分析点 含量/10-6 Th/U 同位素比值 年龄/Ma Pb Th U 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ 207Pb/206Pb 1σ 207Pb/235U 1σ 206Pb/238U 1σ D0204-1-01 2.30 130.01 60.88 2.14 0.04383 0.01053 0.04788 0.01161 0.00797 0.00026 47 11 51 2 D0204-1-02 2.13 84.80 62.02 1.37 0.04506 0.00638 0.05166 0.00753 0.00813 0.00022 51 7 52 1 D0204-1-03 1.60 59.30 42.04 1.41 0.05112 0.00780 0.05903 0.00934 0.00835 0.00023 256 309 58 9 54 1 D0204-1-04 1.99 74.73 61.37 1.22 0.04792 0.00889 0.05180 0.00931 0.00811 0.00030 95 389 51 9 52 2 D0204-1-05 1.55 53.09 53.42 0.99 0.04988 0.00743 0.05973 0.00857 0.00909 0.00027 191 311 59 8 58 2 D0204-1-06 2.08 71.87 64.75 1.11 0.04563 0.00429 0.05879 0.00632 0.00905 0.00026 58 6 58 2 D0204-1-07 1.45 61.92 75.31 0.82 0.11571 0.01014 0.07259 0.00611 0.00469 0.00020 1891 159 71 6 30 1 D0204-1-08 1.47 55.36 46.34 1.19 0.04885 0.00915 0.06421 0.01260 0.00938 0.00029 139 393 63 12 60 2 D0204-1-09 10.74 360.72 168.73 2.14 0.12331 0.01948 0.19709 0.03913 0.01025 0.00042 2006 283 183 33 66 3 D0204-1-10 2.80 128.42 81.77 1.57 0.05172 0.00898 0.05667 0.00933 0.00802 0.00025 272 356 56 9 51 2 D0204-1-11 1.42 55.71 46.69 1.19 0.05735 0.01238 0.06456 0.01420 0.00876 0.00027 506 415 64 14 56 2 D0204-1-12 2.36 87.76 66.41 1.32 0.05594 0.00782 0.06469 0.00841 0.00843 0.00028 450 319 64 8 54 2 D0204-1-13 1.83 65.40 58.94 1.11 0.05205 0.01037 0.05118 0.01279 0.00837 0.00051 287 400 51 12 54 3 D0204-1-14 3.04 97.51 94.71 1.03 0.02920 0.00560 0.03688 0.00740 0.01010 0.00028 37 7 65 2 D0204-1-15 2.75 67.75 58.33 1.16 0.13019 0.00961 0.20104 0.01756 0.01154 0.00048 2102 130 186 15 74 3 D0204-1-16 2.71 96.78 92.07 1.05 0.00000 0.00000 0.05232 0.00859 0.00832 0.00034 52 8 53 2 D0204-1-17 2.89 83.24 62.58 1.33 0.08117 0.04934 0.08451 0.04577 0.00846 0.00027 1226 880 82 43 54 2 D0204-1-18 4.17 165.06 146.94 1.12 0.05976 0.00885 0.06593 0.00744 0.00839 0.00022 594 326 65 7 54 1 D0204-1-19 1.87 69.10 68.68 1.01 0.04307 0.01402 0.05060 0.01656 0.00793 0.00034 50 16 51 2 D0204-1-20 1.64 46.71 41.46 1.13 0.06426 0.01556 0.08741 0.02308 0.00985 0.00047 750 497 85 22 63 3 D0204-1-21 1.43 51.46 44.76 1.15 0.05601 0.01257 0.06549 0.01417 0.00891 0.00031 454 433 64 14 57 2 D0204-1-22 1.62 63.43 53.29 1.19 0.05102 0.00777 0.06318 0.00996 0.00923 0.00025 243 318 62 10 59 2 D0204-1-23 2.83 120.98 73.61 1.64 0.04670 0.00707 0.05972 0.00925 0.00964 0.00031 35 326 59 9 62 2 D0204-1-24 2.81 101.48 66.37 1.53 0.05630 0.00678 0.07465 0.00898 0.00985 0.00031 465 269 73 8 63 2 D0204-1-25 1.99 73.25 65.81 1.11 0.05043 0.00757 0.05771 0.00867 0.00849 0.00025 213 315 57 8 55 2 D0204-1-26 2.89 113.01 70.90 1.59 0.04505 0.01110 0.05384 0.01323 0.00849 0.00024 53 13 55 2 D0204-1-27 1.63 50.32 44.07 1.14 0.05382 0.01148 0.06092 0.01287 0.00861 0.00029 365 418 60 12 55 2 D0204-1-28 3.10 111.91 96.60 1.16 0.04884 0.00674 0.05526 0.00685 0.00859 0.00028 139 296 55 7 55 2 D0204-1-29 1.77 62.05 56.57 1.10 0.06036 0.00950 0.07073 0.01088 0.00860 0.00029 617 344 69 10 55 2 D0204-1-30 1.47 53.51 47.48 1.13 0.05141 0.01039 0.05628 0.01072 0.00821 0.00031 261 472 56 10 53 2 D2271-1-01 12.93 454.74 458.20 0.99 0.04883 0.00566 0.04922 0.00547 0.00746 0.00017 139 252 49 5 48 1 D2271-1-02 7.23 318.13 311.42 1.02 0.04454 0.01133 0.04555 0.01133 0.00739 0.00031 45 11 47 2 D2271-1-03 6.28 352.21 316.30 1.11 0.07228 0.03483 0.03771 0.03663 0.00773 0.00069 994 756 38 36 50 4 D2271-1-04 12.81 487.61 555.00 0.88 0.04759 0.00427 0.04827 0.00427 0.00741 0.00016 80 200 48 4 48 1 D2271-1-05 14.52 487.01 576.02 0.85 0.04601 0.00420 0.04668 0.00394 0.00751 0.00016 46 4 48 1 D2271-1-06 21.46 782.84 796.98 0.98 0.04715 0.00355 0.05028 0.00384 0.00770 0.00015 58 170 50 4 49 1 D2271-1-07 14.86 531.33 547.43 0.97 0.08643 0.04655 0.05013 0.00853 0.00771 0.00021 1348 791 50 8 49 1 D2271-1-08 6.59 302.13 299.78 1.01 0.05649 0.01536 0.05044 0.01374 0.00743 0.00024 472 511 50 13 48 2 D2271-1-09 18.59 650.14 571.68 1.14 0.04744 0.00471 0.04991 0.00479 0.00774 0.00018 78 222 49 5 50 1 D2271-1-10 17.62 625.43 652.63 0.96 0.04782 0.00497 0.04841 0.00525 0.00736 0.00017 100 220 48 5 47 1 D2271-1-11 28.91 1250.91 916.96 1.36 0.04631 0.00430 0.04663 0.00403 0.00747 0.00018 13 220 46 4 48 1 D2271-1-12 10.02 355.94 376.33 0.95 0.04806 0.00698 0.05113 0.00724 0.00762 0.00023 102 311 51 7 49 1 D2271-1-13 13.49 581.85 419.23 1.39 0.05066 0.00736 0.05088 0.00686 0.00745 0.00017 233 298 50 7 48 1 D2271-1-14 99.43 4785.10 1917.08 2.50 0.04752 0.00187 0.05115 0.00201 0.00784 0.00016 76 89 51 2 50 1 D2271-1-15 13.99 451.56 485.18 0.93 0.04791 0.00722 0.05333 0.00808 0.00832 0.00030 95 322 53 8 53 2 D2271-1-16 8.34 310.14 312.87 0.99 0.03803 0.01050 0.04417 0.01413 0.00774 0.00022 44 14 50 1 D2271-1-17 27.12 1148.15 679.00 1.69 0.04938 0.00404 0.05728 0.00520 0.00866 0.00048 165 181 57 5 56 3 D2271-1-18 13.71 546.36 433.97 1.26 0.04897 0.00539 0.05073 0.00539 0.00776 0.00016 146 241 50 5 50 1 D2271-1-19 22.72 694.60 647.13 1.07 0.04584 0.00805 0.04942 0.00829 0.00781 0.00025 49 8 50 2 D2271-1-20 25.23 755.58 817.03 0.92 0.07766 0.00653 0.08193 0.00712 0.00767 0.00018 1139 169 80 7 49 1 D2271-1-21 11.05 447.91 370.70 1.21 0.04849 0.00949 0.05336 0.01056 0.00812 0.00020 124 404 53 10 52 1 D2271-1-22 19.61 881.08 624.44 1.41 0.04731 0.00372 0.04823 0.00371 0.00744 0.00015 65 178 48 4 48 1 D2271-1-23 9.72 362.06 351.35 1.03 0.04713 0.00756 0.04736 0.00753 0.00750 0.00016 58 341 47 7 48 1 D2271-1-24 11.40 465.90 530.57 0.88 0.04720 0.00537 0.05005 0.00565 0.00759 0.00015 61 248 50 5 49 1 D2271-1-25 13.46 514.88 490.81 1.05 0.04724 0.00556 0.04846 0.00570 0.00750 0.00019 61 259 48 6 48 1
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表 3 日多地区米忍岩体锆石Hf同位素组成分析结果
Table 3 Hf isotopic data of zircons from Miren rocks in Riduo area
样品号 t/Ma 176Yb/177Hf 2σ 176Lu/177Hf 2σ 176Hf/177Hf 2σ εHf(0) εHf(t) (176Hf/177Hf)i tDM1/Ma tDM2/Ma fLu/Hf D0204-1-01 51.2 0.04228206 0.00092 0.001194067 0.0000261 0.282819 0.0000199 1.7 2.7 0.282817859 616.6 949.9 -0.964045 D0204-1-02 52.2 0.04038035 0.000381 0.001167999 0.00000986 0.2828985 0.0000202 4.5 5.6 0.282897361 503.0 769.3 -0.96483 D0204-1-03 53.6 0.02271428 0.0000674 0.000651701 0.00000134 0.2829529 0.0000182 6.4 7.6 0.282952247 419.7 644.0 -0.980376 D0204-1-04 52.1 0.02556968 0.000232 0.000752814 0.00000547 0.2828695 0.0000171 3.4 4.6 0.282868767 538.3 834.1 -0.977332 D0204-1-06 58.1 0.05982562 0.000278 0.001749438 0.00000851 0.282933 0.0000199 5.7 6.9 0.282931102 461.0 689.0 -0.947322 D0204-1-08 60.2 0.02376553 0.000101 0.000685301 0.00000281 0.2829455 0.0000187 6.1 7.4 0.28294473 430.5 656.8 -0.979365 D0204-1-10 51.5 0.06452603 0.00127 0.001795006 0.0000363 0.2828958 0.0000205 4.4 5.4 0.282894074 515.5 777.1 -0.94595 D0204-1-11 56.2 0.02167035 0.0000771 0.000626035 0.00000136 0.2829046 0.0000182 4.7 5.9 0.282903942 487.3 751.8 -0.981149 D0204-1-12 54.1 0.04413258 0.000333 0.001245586 0.0000103 0.2829119 0.0000192 4.9 6.1 0.282910641 484.9 738.0 -0.962494 D0204-1-13 53.7 0.02336732 0.000227 0.000669959 0.00000515 0.2829074 0.0000199 4.8 5.9 0.282906728 483.9 747.1 -0.979827 D0204-1-16 53.4 0.03600378 0.000142 0.001062279 0.00000422 0.2829181 0.0000175 5.2 6.3 0.28291704 473.8 723.9 -0.968013 D0204-1-18 53.9 0.04790006 0.000286 0.001387101 0.00000709 0.2829377 0.0000175 5.9 7.0 0.282936304 449.8 679.9 -0.958232 D0204-1-19 50.9 0.05050586 0.000554 0.001417883 0.0000163 0.2829526 0.0000198 6.4 7.5 0.282951251 428.8 647.9 -0.957306 D0204-1-22 59.3 0.03527519 0.000674 0.000982377 0.0000167 0.2829224 0.0000169 5.3 6.6 0.282921313 466.7 710.5 -0.970419 D0204-1-23 61.8 0.03530693 0.000187 0.000993284 0.0000046 0.2829396 0.0000209 5.9 7.2 0.282938453 442.4 670.0 -0.970091 D0204-1-25 54.5 0.03495778 0.000115 0.001038461 0.00000411 0.2829622 0.0000196 6.7 7.9 0.282961142 410.8 623.2 -0.96873 D0204-1-26 54.5 0.04224788 0.000776 0.001160659 0.0000219 0.2828813 0.0000199 3.9 5.0 0.282880118 527.4 806.9 -0.965051 D0204-1-27 55.3 0.0400008 0.00016 0.001136954 0.0000037 0.282946 0.0000208 6.2 7.3 0.282944826 435.0 659.7 -0.965765 D0204-1-28 55.1 0.03602579 0.000241 0.001225747 0.00000798 0.2829891 0.000018 7.7 8.8 0.282987838 374.4 562.2 -0.963091 D0204-1-30 52.7 0.0286314 0.000116 0.000810488 0.00000437 0.2829194 0.00002 5.2 6.3 0.282918602 468.8 720.8 -0.975595 D2271-1-01 47.9 0.02714477 0.0000158 0.00078377 0.00000164 0.2829532 0.0000127 6.4 7.4 0.282952499 420.7 647.1 -0.976399 D2271-1-02 47.5 0.02702843 0.0002020 0.00079536 0.00000509 0.2829790 0.0000124 7.3 8.3 0.282978294 384.4 588.8 -0.976051 D2271-1-03 49.6 0.04025495 0.0001490 0.00119915 0.00000641 0.2829463 0.0000153 6.2 7.2 0.282945188 435.3 662.5 -0.963892 D2271-1-04 47.6 0.02768171 0.0000842 0.00081525 0.00000151 0.2829662 0.0000131 6.9 7.9 0.282965476 402.7 617.8 -0.975452 D2271-1-05 48.2 0.03151712 0.0000443 0.00093078 0.00000224 0.2829869 0.0000145 7.6 8.6 0.282986061 374.6 570.6 -0.971973 D2271-1-06 49.5 0.03453471 0.0002490 0.00100078 0.00000553 0.2829792 0.0000137 7.3 8.4 0.282978275 386.2 587.5 -0.969865 D2271-1-07 49.5 0.03121221 0.0000248 0.00090820 0.00000047 0.2829588 0.0000136 6.6 7.7 0.282957961 414.2 633.6 -0.972653 D2271-1-09 49.7 0.02593469 0.0000548 0.00077669 0.00000173 0.2829064 0.0000133 4.8 5.8 0.282905679 486.7 752.1 -0.976613 D2271-1-10 47.3 0.03278806 0.0000662 0.00095816 0.00000219 0.2829030 0.0000141 4.6 5.6 0.282902154 493.8 761.6 -0.971148 D2271-1-11 47.9 0.05085269 0.0006780 0.00143998 0.00002100 0.2829726 0.0000148 7.1 8.1 0.28297131 400.3 604.3 -0.95664 D2271-1-12 48.9 0.02664593 0.0000907 0.00079030 0.00000183 0.2829288 0.0000131 5.5 6.6 0.282928078 455.3 701.8 -0.976203 D2271-1-13 47.8 0.03217512 0.0004540 0.00091555 0.00001080 0.2829376 0.0000149 5.9 6.9 0.282936782 444.3 682.7 -0.972431 D2271-1-14 50.4 0.08687010 0.0002610 0.00243093 0.00001040 0.2830360 0.0000164 9.3 10.4 0.283033713 317.5 460.9 -0.926801 D2271-1-15 53.4 0.03728973 0.0001040 0.00111316 0.00000264 0.2829868 0.0000128 7.6 8.7 0.28298569 376.6 568.2 -0.966481 D2271-1-17 55.6 0.08208087 0.0021700 0.00232414 0.00005900 0.2830360 0.0000241 9.3 10.5 0.283033587 316.6 457.9 -0.930017 D2271-1-18 49.8 0.05583740 0.0007450 0.00160083 0.00002340 0.2829888 0.0000158 7.7 8.7 0.282987309 378.6 566.7 -0.951797 D2271-1-19 50.2 0.02709782 0.0001690 0.00079420 0.00000380 0.2829462 0.0000144 6.2 7.2 0.282945456 430.7 661.6 -0.976086 D2271-1-20 49.3 0.03317768 0.0003490 0.00098266 0.00000973 0.2829399 0.0000134 5.9 7.0 0.282938996 441.8 676.8 -0.970411 D2271-1-21 52.1 0.03766566 0.0005250 0.00109122 0.00001600 0.2830032 0.0000142 8.2 9.3 0.283002137 353.0 531.6 -0.967142 D2271-1-22 47.8 0.03258577 0.0001410 0.00096239 0.00000283 0.2829886 0.0000144 7.7 8.7 0.282987741 372.5 567.1 -0.971021 D2271-1-23 48.2 0.04579663 0.0011800 0.00128907 0.00003010 0.2829803 0.0000152 7.4 8.4 0.282979141 387.6 586.4 -0.961184
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