| 西藏工布江达地区亚贵拉铅锌钼矿床辉钼矿Re-Os测年及其地质意义 |
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| 引用本文： | 高一鸣,陈毓川,唐菊兴,李超,李新法,高明,蔡志超.西藏工布江达地区亚贵拉铅锌钼矿床辉钼矿Re-Os测年及其地质意义[J].中国区域地质,2011(7):1027-1036. |
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| 作者姓名： | 高一鸣 陈毓川 唐菊兴 李超 李新法 高明 蔡志超 |
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| 作者单位： | [1]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,北京100037 [2]中国地质科学院,北京100037 [3]国家地质实验测试中心,北京100037 [4]河南省地质调查院,河南郑州450001 |
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| 基金项目： | 国家基础研究计划“973”项目《青藏高原南部大陆聚合与成矿作用》（编号：2011CB403103）; 国家科技支撑项目《西部优势矿产资源潜力评价体系及集成示范研究》（编号：2006BAB01A01）; 中国地质调查局青藏高原专项项目《西藏冈底斯东段中新生代斑岩成矿系统与找矿预测》（编号：1212010012005） |
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| 摘 要： | 为确定念青唐古拉成矿带斑岩型矿床的成矿时间,对亚贵拉铅锌钼多金属矿集区斑岩钼矿的5件辉钼矿样品进行了Re-Os同位素分析,所获辉钼矿模式年龄在（64.27±0.90）～（65.97±1.13）Ma范围内,等时线年龄为（65.0±1.9）Ma（MSWD=3.2）。亚贵拉辉钼矿属主碰撞期成矿,成矿与短期内大规模的岩浆活动有关,暗示念青唐古拉—冈底斯地区存在大规模的主碰撞期成矿作用。
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| 关 键 词： | Re-Os同位素年龄 辉钼矿 斑岩钼矿 念青唐古拉 西藏 |
Re-Os dating of molybdenite from the Yaguila porphyry molybdenum deposit in Gongbo＇gyamda area,Tibet,and its geological significance |
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| GAO Yi-ming,CHEN Yu-chuan,TANG Ju-xing,LI Chao,LI Xin-fa,GAO Ming,CAI Zhi-chao.Re-Os dating of molybdenite from the Yaguila porphyry molybdenum deposit in Gongbo＇gyamda area,Tibet,and its geological significance[J].Regional Geology of China,2011(7):1027-1036. |
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| Authors: | GAO Yi-ming CHEN Yu-chuan TANG Ju-xing LI Chao LI Xin-fa GAO Ming CAI Zhi-chao |
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| Institution: | 1.Institute of Mineral Resources,Chinese Academy of Geological Sciences/Key Laboratory of Metallogeny and Mineral Resource Assessment,Ministry of Land and Resource,Beijing 100037,China; 2.Chinese Academy of Geological Sciences,Beijing 100037,China; 3.National Research Center of Geoanalysis,Beijing 100037,China; 4.Henan Institute of Geological Survey,Zhengzhou 450001,Henan,China |
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| Abstract: | Located in the Gongbo＇gyamda County of Tibet,the Yaguila Pb-Zn,Mo deposit is a porphyry Mo skarn-hydrothermal vein type deposit occurring in the eastern part of the Gangdise belt.For the purpose of finding out the mineralization time of the porphyry type molybdenum deposit in the Nianqingtanggula mineralization belt,the authors selected five molybdenite samples from the Yaguila ore district to perform the Re-Os dating.The Re-Os dating yielded weighted average model ages of（64.27±0.9） to（65.97±1.13） Ma,varying in a narrow range,and an isochrone age of 65.0±1.9Ma（MSWD=3.2）.It is proved that the porphyry type molybdenum deposit of the Yaguila ore district was formed during Early Eocene.The results indicate that there occurred large scale ore-forming processes during the main Indian-Asian collision period in the Gangdise belt. |
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| Keywords: | Re-Os dating molybdenite porphyry molybdenum deposit Nianqingtanggula Tibet |
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