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| 东天山东戈壁钼矿辉钼矿Re-Os同位素年龄及地质意义 | |
| 引用本文： | 涂其军,董连慧,王克卓.东天山东戈壁钼矿辉钼矿Re-Os同位素年龄及地质意义[J].新疆地质,2012,30(3):272-276. |
| 作者姓名： | 涂其军 董连慧 王克卓 |
| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京100083;新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000 2. 新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐,830000 3. 新疆维吾尔自治区地质调查院,新疆乌鲁木齐,830000 |
| 摘 要： | 东戈壁钼矿位于新疆东天山哈密库姆塔格沙垄东侧,康古尔断裂与雅满苏断裂之间.矿体赋存于隐伏斑状钾长花岗岩体上部,赋矿岩石为下石炭统干墩组变质泥质砂岩、变质砂质泥岩、变质砂岩等.矿石矿物主要为辉钼矿、黄铁矿,微量黄铜矿、金红石、方铅矿、闪锌矿,白钨矿、钛铁矿等,石英脉和裂隙发育部位发育辉钼矿,形成矿区内的富矿体.对辉钼矿中的Re-Os同位素年龄测定,获得矿床形成的等时线年龄为(231.1±1.5) Ma,加权平均年龄为(232.3±1.2) Ma,成矿时代为中三叠世.该矿床测年结果代表了东天山地区印支期一次成矿作用的高峰,为重建东天山地区中生代以来岩浆演化与成矿作用提供了科学依据和重要线索. |
| 关 键 词： | 东戈壁 钼矿 Re-Os测年 印支期 |
Molybdenite Re-Os Dating and its Geological Implication for the East Gebi Molybdenum deposit of the Eastern Tianshan Mountain in Xinjiang |
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| TU Qi-jun , DONG Lian-hui , WANG Ke-zhuo.Molybdenite Re-Os Dating and its Geological Implication for the East Gebi Molybdenum deposit of the Eastern Tianshan Mountain in Xinjiang[J].Xinjiang Geology,2012,30(3):272-276. | |
| Authors: | TU Qi-jun DONG Lian-hui WANG Ke-zhuo |
| Institution: | 1.School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China;2.Xinjiang Institute of Geological Survey,Urumqi,Xinjiang,830000,China;3.Xinjiang Bureau of Geology and Mineral Resources Exploration and Development,Urumqi,Xinjiang,830000,China) |
| Abstract: | The East Gebi Molybdenum deposit located between the Kangguer fracture and Yamansu fracture in the east of Hami Kumudage sand ridge,east Tanshan mountain,Xinjiang province.The ore-body is in the top of concealed porphyritic potassium feldspar granite rock,the characteristics of the surrounding rocks are metamorphism argillaceous sandstones,metamorphism sandy mudstones and metamorphic sandstones of early Carboniferous Gandun group.The ore minerals are mainly Molybdenite,Pyrite and little Chalcopyrite,Rutile,Galena,Sphalerite,Scheelite,Ilmenite and so on,the Molybdenite occurred in Quzrtz-veins and cracks formed the oreshoot.The Re-Os isotopic of the Molybdenite shows that the isochron age of the deposit is(231.1±1.5) Ma and the weighted average age is(232.3±1.2) Ma,the deposit was formed in mid-Triassic.The age of the deposit shows that a peak mineralization occurred at Indosinian in east Tianshan mountain region.This study gives some new evidences and clues for rebuilding the magmatic evolution and the mineralization since Mesozoic in east Tianshan mountain region. |
| Keywords: | East Gebi Molybdenum ore Re-Os dating Indosinian |
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