| 阿尔泰蒙库铁矿斜长角闪岩锆石SHRIMP U-Pb年龄及地质意义 |
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| 引用本文： | 张保江,李强,耿新霞,杨富全,刘锋.阿尔泰蒙库铁矿斜长角闪岩锆石SHRIMP U-Pb年龄及地质意义[J].新疆地质,2012,30(3):277-282. |
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| 作者姓名： | 张保江 李强 耿新霞 杨富全 刘锋 |
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| 作者单位： | 1. 河北省地矿局第四水文工程地质大队,河北沧州,061000
2. 中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点开放实验室,北京100037 |
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| 基金项目： | 国家自然科学基金项目(40672065);国家科技支撑计划项目(2011BAB06B03-02;2006BAB07B02-01)联合资助 |
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| 摘 要： | 蒙库大型铁矿位于阿尔泰南缘麦兹盆地,赋存于康布铁堡组变质火山-沉积岩系中,容矿岩石为石榴石矽卡岩、变粒岩、浅粒岩、斜长角闪岩和大理岩.矿体总体顺层分布,空间上与矽卡岩密切相关.对9号矿体围岩斜长角闪岩锆石SHRIMP U-Pb年龄进行了测定,12颗锆石的206Pb/238U加权平均年龄为(403.9±4.8) Ma(MSDW=1.3).结合区域年代学资料,限定康布铁堡组形成时代为晚志留—早泥盆世,同时限定蒙库铁矿形成时代小于404 Ma.
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| 关 键 词： | 阿尔泰 蒙库铁矿 锆石SHRIMP U-Pb年龄 斜长角闪岩 |
Shrimp U-Pb Age of the Amphibolite from Mengku Iron Deposit and its Geological Implications in Altay,Xinjiang |
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| ZHANG Bao-jiang
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LI Qiang
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GENG Xin-xia
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YANG Fu-quan
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LIU Feng.Shrimp U-Pb Age of the Amphibolite from Mengku Iron Deposit and its Geological Implications in Altay,Xinjiang[J].Xinjiang Geology,2012,30(3):277-282. |
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| Authors: | ZHANG Bao-jiang LI Qiang GENG Xin-xia YANG Fu-quan LIU Feng |
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| Institution: | 1.No.4 Hydrogeological Party of the Hebei Bureau of Geology,Cangzhou,Hebei,061000,China; 2.MRL Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources, Chinese Academy of Geological Sciences,Beijing,100037,China) |
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| Abstract: | The Mengku large-size iron deposit occurs in metavolcanic-sedimentary sequence of the Kangbutiebao Formation in the Maizi Basin of south Altay,with the host rocks being garnet skarn,granulitite,leucogranulitite,amphibolite and marble.Orebodies are largely concordant with the bedding of the strata,and the distribution of the orebodies is spatially related to skarn.Precise SHRIMP U-Pb dating of zircon from the amphibolite in the No.9 orebody wall rock of the Mengku iron deposit has been carried out in this study.The results show that the weighted average 206Pb/238U age of the 12 zircon grains is(403.9±4.8) Ma(MSDW=1.3).A combination of the ages of Kangbutiebao Formation in the region limits the Kangbutiebao Formation is of Late Silurian-Early Devonian,and constraining the age of the Mengku iron deposit to<404 Ma. |
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| Keywords: | Altay Mengku iron deposit Zircon SHRIMP U-Pb dating Amphibolite |
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