| 西藏玉龙斑岩铜钼矿辉钼矿铼-锇同位素定年及其成矿学意义 |
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| 引用本文： | 唐菊兴,王成辉,屈文俊,杜安道,应立娟,高一鸣.西藏玉龙斑岩铜钼矿辉钼矿铼-锇同位素定年及其成矿学意义[J].岩矿测试,2009,28(3):215-218. |
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| 作者姓名： | 唐菊兴 王成辉 屈文俊 杜安道 应立娟 高一鸣 |
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| 作者单位： | 1. 中国地质科学院矿产资源研究所,北京,100037
2. 国家地质实验测试中心,北京,100037 |
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| 基金项目： | 国土资源地质大调查项目，中国成矿体系综合研究项目，我国西部重要成矿区带矿产资源潜力评估项目 |
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| 摘 要： | 玉龙铜钼矿床是金沙江—红河斑岩铜矿带北部的一个超大型铜钼矿,也是我国目前最大的几个铜矿之一。玉龙铜矿曾经作为我国新生代最典型的斑岩铜矿,在西南三江及冈底斯斑岩铜矿带的地质找矿工作中起到了典型示范作用;但与其成矿作用有关的科学问题还尚待进行深入研究,精确的成矿时代及其成矿演化历史就是其中主要课题之一。文章对采自矿区钻孔的5件辉钼矿样品进行铼-锇同位素定年,得到的等时线年龄为(41.6±1.4)Ma。5件样品的模式年龄表明,玉龙超大型铜钼矿床成矿作用的时间跨度约为1.5Ma,说明成矿作用是在较短时期内完成,反映了独特的成矿背景和成矿机制;成矿时代也表明玉龙铜钼矿形成于早喜马拉雅阶段变形变质造山高峰期与中喜马拉雅阶段变形变质造山高峰期之间,反映了独特的成矿背景和成矿机制。
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| 关 键 词： | 斑岩 玉龙铜钼矿 铼-锇同位素定年 成矿时限 成矿背景 |
| 收稿时间： | 2009/2/10 0:00:00 |
| 修稿时间： | 2009/3/16 0:00:00 |
Re-Os Isotopic Dating of Molybdenite from the Yulong Porphyry Copper-Molybdenum Deposit in Tibet and Its Metallogenic Significance |
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| TANG Ju-xing,WANG Cheng-hui,QU Wen-jun,DU An-dao,YING Li-juan,GAO Yi-ming.Re-Os Isotopic Dating of Molybdenite from the Yulong Porphyry Copper-Molybdenum Deposit in Tibet and Its Metallogenic Significance[J].Rock and Mineral Analysis,2009,28(3):215-218. |
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| Authors: | TANG Ju-xing WANG Cheng-hui QU Wen-jun DU An-dao YING Li-juan GAO Yi-ming |
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| Institution: | Institute of Mineral Resources, Chinese Academy of Geological Sciences;Institute of Mineral Resources, Chinese Academy of Geological Sciences;National Research Center for Geoanalysis;National Research Center for Geoanalysis;Institute of Mineral Resources, Chinese Academy of Geological Sciences;Institute of Mineral Resources, Chinese Academy of Geological Sciences |
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| Abstract: | Located in the north of the Jinshajiang-Honghe porphyry copper metallogenic belt,the Yulong deposit is a giant porphyry copper-molybdenum deposit. This study provides the high-precision Re-Os dating of the mineralization age. The Re-Os model ages for 5 molybdenite samples are from 39.29 Ma to 41.29 Ma. According to the best-fit calculation for 5 samples,the Yulong deposit yield an isochron age of (41.6±1.4) Ma. These data indicate that the mineralization occurred in a very short period with mineralization age span of about 1.5 Ma. And it also implies the special metallogenic environment and metallogenic mechanism of the Yulong porphyry copper-molybdenum deposit. |
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| Keywords: | porphyry the Yulong copper-molybdenum deposit Re-Os isotopic dating metallogenic age metallogenic environment |
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