| 内蒙古丰镇市泉子沟斑岩钼矿床成岩成矿年代学及其地质意义 |
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| 引用本文： | 张明玉,李铁刚,陈公正,吴晓光,赵正,黄凡,吴昊,王国瑞,许立权,张彤.内蒙古丰镇市泉子沟斑岩钼矿床成岩成矿年代学及其地质意义[J].矿床地质,2018,37(2):339-354. |
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| 作者姓名： | 张明玉 李铁刚 陈公正 吴晓光 赵正 黄凡 吴昊 王国瑞 许立权 张彤 |
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| 作者单位： | 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实验室;中国地质大学地球科学与资源学院;内蒙古自治区有色地质勘查局六〇九队;武警黄金第四支队;万宝矿产有限公司;内蒙古自治区地质调查院 |
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| 基金项目： | 国家自然科学基金项目（编号：41572061）、内蒙古自治区地质勘查基金项目（编号：2012-03-YS01）和中国地质调查局中国矿产地质与成矿规律综合集成和服务（矿产地质志）项目（编号：DD20160346）资助 |
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| 摘 要： | 泉子沟斑岩钼矿床位于内蒙古丰镇市,地处华北克拉通北缘内蒙古台隆凉城断隆内。矿区出露一套燕山期花岗质杂岩体——红娘山杂岩体,主要由中粗粒花岗岩、似斑状花岗岩和石英斑岩组成,钼矿体主要赋存于似斑状花岗岩中。文章在详细的野外地质调查基础上,对泉子沟矿床的成岩成矿时代进行了详细研究,并探讨了地质意义。5件辉钼矿样品的Re-Os模式年龄介于(158.8±2.2)Ma~(161.5±2.2)Ma之间,其加权平均值为(159.8±1.0)Ma(MSWD=0.92),等时线年龄为(161.7±3.1)Ma(MSWD=1.40)。红娘山杂岩体LA-ICP-MS锆石U-Pb年龄分别为:中粗粒花岗岩结晶年龄为(173±1)Ma(MSWD=0.88),似斑状花岗岩侵位年龄为(162±1)Ma(MSWD=0.40),石英斑岩结晶年龄为(160±2)Ma(MSWD=1.90)。辉钼矿Re-Os和锆石U-Pb定年结果表明,泉子沟钼矿床形成于晚侏罗世早期,成矿与似斑状花岗岩关系密切。泉子沟钼矿床的辉钼矿w(Re)介于16.49×10~(-6)~32.87×10~(-6),暗示成矿物质主要来自下地壳。
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| 关 键 词： | 地球化学 辉钼矿Re-Os年龄 锆石U-Pb年龄 泉子沟斑岩钼矿床 红娘山杂岩体 内蒙古 华北克拉通北缘 |
| 收稿时间： | 2016/12/15 0:00:00 |
| 修稿时间： | 2018/2/20 0:00:00 |
Diagenetic and metallogenic ages of Quanzigou porphyry molybdenum deposit in Fengzhen City, Inner Mongolia, and their geological significance |
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| ZHANG MingYu,LI TieGang,CHEN GongZheng,WU XiaoGuang,ZHAO Zheng,HUANG Fan,WU Hao,WANG GuoRui,XU LiQuan and ZHANG Tong.Diagenetic and metallogenic ages of Quanzigou porphyry molybdenum deposit in Fengzhen City, Inner Mongolia, and their geological significance[J].Mineral Deposits,2018,37(2):339-354. |
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| Authors: | ZHANG MingYu LI TieGang CHEN GongZheng WU XiaoGuang ZHAO Zheng HUANG Fan WU Hao WANG GuoRui XU LiQuan and ZHANG Tong |
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| Institution: | MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,School of Earth Science and Resources, China University of Geosciences, Beijing 100083, China,No. 609 Geological Party, Inner Mongolia Nonferrous Geological Prospecting Bureau, Ulanqab 012000, Inner Mongolia, China,MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,No.4 Detachment of Gold Headquarters, Chinese Armed Police Force, Liaoyang 111000, Liaoning, China,Wanbao Mining Co., Ltd., Beijing 100053, China,Inner Mongolia Institute of Geological Survey, Hohhot 010020, Inner Mongolia, China and Inner Mongolia Institute of Geological Survey, Hohhot 010020, Inner Mongolia, China |
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| Abstract: | The Quanzigou porphyry molybdenum deposit is located in Fengzhen City of Inner Mongolia and belongs to the Liangcheng fault-uplift in the Inner Mongolia platform uplift on the northern margin of the North China craton. A Yanshanian granitic complex, namely Hongniangshan complex, is exposed in the deposit, which is mainly composed of medium-coarse grained granite, porphyritic granite and quartz porphyry. The molybdenum orebodies occur mainly in the porphyritic granite. Based on detailed field geological survey, the authors studied the diagenetic and metallogenic ages of the Quanzigou deposit and discussed their geological significance. Five molybdenite samples in the Quanzigou deposit were selected for Re-Os dating, which yielded an isochron age of (161.7±3.1)Ma (MSWD=1.4) and a weighted mean age of (159.8±1.0)Ma (MSWD=0.92). The LA-ICP-MS zircon U-Pb ages of the Hongnianshan complex indicate that the age of medium-coarse grained granite is (173±1)Ma (MSWD=0.88), that of porphyritic granite is (162±1)Ma (MSWD=0.40), and that of quartz porphyry is (160±2)Ma (MSWD=1.90). The results of molybdenite Re-Os and zircon U-Pb dating show that the Quanzigou molybdenum deposit was formed in the early Jurassic and that the mineralization was closely related to porphyritic granite. The w (Re) content of the molybdenite in the Quanzigou Mo deposit ranges from 16.49×10-6 to 32.87×10-6, indicating that the ore-forming materials mainly originated from the lower crust. |
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| Keywords: | geochemistry molybdenite Re-Os age zircon U-Pb age Quanzigou porphyry Mo deposit Hongniangshan complex Inner Mongolia northern margin of North China craton |
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