| 滇西马厂箐斑岩型铜钼(金)矿床成岩成矿时代研究 |
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| 引用本文： | 和文言,莫宣学,喻学惠,李勇,黄行凯,和中华.滇西马厂箐斑岩型铜钼(金)矿床成岩成矿时代研究[J].地学前缘,2011,18(1):207-215. |
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| 作者姓名： | 和文言 莫宣学 喻学惠 李勇 黄行凯 和中华 |
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| 作者单位： | 和文言,莫宣学,喻学惠,李勇,黄行凯,He Wenyan,Mo Xuanxue,Yu Xuehui,Li Yong,Huang Xingkai(地质过程与矿产资源国家重点实验室;中国地质大学(北京)地球科学与资源学院,北京,100083);和中华,He Zhonghua(云南黄金矿业集团股份有限公司,云南,昆明,650224) |
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| 基金项目： | 国家重点基础研究发展计划"973"项目"三江特提斯复合造山与成矿"下属子课题 |
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| 摘 要： | 滇西马厂箐铜钼(金)矿床是金沙江-哀牢山构造带与喜马拉雅期富碱斑岩有关的典型斑岩型矿床之一.富碱斑岩侵入体为多期、多阶段岩浆活动形成的复式岩体,已有的研究资料表明岩浆活动时限在64～29 Ma.文中提供的锆石LA-ICP-MS U-Pb和辉钼矿Re-Os同位素年代学研究资料显示,马厂箐含矿岩体锆石U-Pb年龄(封闭温度...
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| 关 键 词： | 滇西 马厂箐铜钼金矿床 新生代富碱斑岩 成岩年龄 成矿年龄 |
Geochronological study of magmatic intrusions and mineralization of Machangqing porphyry Cu-Mo-Au deposit,Western Yunnan Province |
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| He Wenyan,Mo Xuanxue,Yu Xuehui,Li Yong,Huang Xingkai,He Zhonghua.Geochronological study of magmatic intrusions and mineralization of Machangqing porphyry Cu-Mo-Au deposit,Western Yunnan Province[J].Earth Science Frontiers,2011,18(1):207-215. |
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| Authors: | He Wenyan Mo Xuanxue Yu Xuehui Li Yong Huang Xingkai He Zhonghua |
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| Institution: | He Wenyan1,Mo Xuanxue1,Yu Xuehui1,Li Yong1,Huang Xingkai1,He Zhonghua21.State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083,China2.Yunnan Geology and Mineral Resources Co.Ltd,Kunming 650224,China |
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| Abstract: | The Machangqing porphyry Cu-Mo-Au deposit is one of the typical deposits associated with the alkaline-rich porphyry in the Jinshajiang-Ailaoshan tectonic belt of the Himalayan epoch.Alkalite intrusive rock is a superimposed intrusive complex formed by multiperiodic and multistage magmatic activities.The time limit of magmatic activity is 64-29 Ma.In situ zircon LA-ICP-MS U-Pb ages and molybdenite Re-Os ages indicate that the age of ore-bearing granite prophyry is 37.93±0.82 Ma,whereas the mineralization age is 34.72±0.5 Ma,which shows that the mineralization mainly related to the later magmatic activity.The closeness among zircon U-Pb,molybdenite Re-Os,and K-Ar ages in the Machangqing porphyry indicates that the ore-forming system cooled from about 800 ℃(zircon crystallization temperature) through 500 ℃(closure temperature for Re-Os in molybdenite) to below 300 ℃(closure temperature for Ar in biotite) in a very short period.The duration of the Machangqing giant ore-forming system is less than 2 Ma.The porphyry copper and molybdenum deposit of Jinshajiang-Ailaoshan mineralization belt was the product of the syn-mineralization,and the mineralization time limit focused on 40-35 Ma. |
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| Keywords: | Western Yunnan Machangqing Cu-Mo-Au deposits Cenozoic porphyry rich in alkali age of magmatic intrusion age of mineralization |
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