地学前缘 ›› 2010, Vol. 17 ›› Issue (2): 170-177.

• 论文 • 上一篇    下一篇

安徽青阳百丈岩钨钼矿床成岩成矿年龄测定及地质意义

秦燕, 王登红, 李延河, 王克友, 吴礼彬, 梅玉萍   

  1. 1中国地质科学院 研究生部, 北京 100037
    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实验室, 北京 100037
    3安徽省地质调查院, 安徽 合肥 230000
    4中国地质调查局 宜昌地质矿产研究所, 湖北 宜昌 443003
  • 收稿日期:2009-06-28 修回日期:2009-11-10 出版日期:2010-03-15 发布日期:2010-04-05
  • 作者简介:秦燕(1982—),女,博士研究生,同位素地球化学专业。Email: happyqinyan1982@163.com
  • 基金资助:

    中国地质大调查项目“我国重要矿产和区域成矿规律研究”（1212010633903）、“中国成矿体系综合研究”（1212010634002）

 Rockforming and oreforming ages of the Baizhangyan tungstenmolybdenum ore deposit in Qingyang, Anhui Province and their geological significance.

QIN  Yan, WANG  De-Gong, LI  Yan-He, WANG  Ke-You, TUN  Li-Ban, MEI  Yu-Ping   

  1. 1Graduate Department, Chinese Academy of Geological Sciences, Beijing 100037, China
    2Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources,Chinese Academy of Geological Sciences, Beijing 100037, China
    3Anhui Geological Survey, Hefei 230000, China
    4Yichang Institute of Geology and Mineral Resources, Yichang 443003, China
  • Received:2009-06-28 Revised:2009-11-10 Online:2010-03-15 Published:2010-04-05

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摘要：

百丈岩钨钼矿床是在老矿点基础上新查明的中型层控夕卡岩型钨钼矿床。文中对含矿岩体和矿石进行了成岩成矿年龄测定,获得百丈岩细粒花岗岩锆石SHRIMP U-Pb年龄为(130±1.5) Ma(n=14,MSWD=0.69),浸染状辉钼矿Re-Os同位素等时线年龄为(136.3±2.6) Ma(n=5,MSWD=0.64),模式年龄为(133.5±1.9)～(135.6±2.0) Ma。综合区域最新获得的高精度测年数据分析,结果表明,百丈岩钨钼矿床形成于早白垩世,和与之有密切成因关系的花岗岩体成岩是同期的,属于燕山晚期陆壳重熔型花岗质岩浆侵位的产物。

关键词: 百丈岩钨钼矿, SHRIMP, U-Pb, Re-Os, 锆石, 辉钼矿, 青阳

Abstract:

Baizhangyan tungstenmolybdenum ore deposit is a newly developed deposit which was found on the base of a small exposure of mineralization occurrence. With highly precise dating of the ages of the rockforming and oreforming, the authors obtained a SHRIMP UPb zircon age of (130±15) Ma（n=14，MSWD=069）for finegrained granite and ReOs model ages of (133.5±1.9)(135.6±2.0) Ma and isochron age of (136.3±2.6) Ma（n=5，MSWD=0.64）. According to the ages above, the authors concluded that the deposit was formed in the Early Cretaceous; that it was the result of intrusions of the granite which was of crustsource remelting type. The oreforming age is similar to the rockforming age of the granite rock body that was important to the deposit.

Key words: Baizhangyan tungstenmolybdenum ore deposit, SHRIMP, UPb, ReOs, zircon, molybdenite, Qingyang

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