吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (4): 1098-1111.doi: 10.13278/j.cnki.jjuese.201504113

• 地质与资源 • 上一篇    下一篇

内蒙古阿巴嘎旗乌和尔楚鲁图钼矿区成矿斑岩的岩石地球化学特征与年代学

俞礽安1,2, 唐永香3, 张峰2, 谢瑜2, 张超2, 郭虎2   

  1. 1. 中国地质大学(北京)地球科学与资源学院, 北京 100083;
    2. 中国地质调查局天津地质调查中心, 天津 300170;
    3. 天津地热勘查开发设计院, 天津 300250
  • 收稿日期:2014-11-12 发布日期:2015-07-26
  • 作者简介:俞礽安(1980),男,工程师,主要从事地质矿产勘查方面研究,E-mail:yurengan@163.com.
  • 基金资助:

    中国地质调查局地质调查项目(1212011120720)

Petrogeochemical Feature and Geochronology of the Ore-Forming Porphyry in Wheerclt Molybdenum Deposit in Abag Banner, Inner Mongolia

Yu Reng'an1,2, Tang Yongxiang3, Zhang Feng2, Xie Yu2, Zhang Chao2, Guo Hu2   

  1. 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;
    2. Tianjin Centre of China Geological Survey, Tianjin 300170, China;
    3. Tianjin Geothermal Exploration and Development-Designing Institute, Tianjin 300250, China
  • Received:2014-11-12 Published:2015-07-26

摘要:

乌和尔楚鲁图钼矿床位于国内重要的二连东乌旗钼矿成矿带中,为近几年新发现的斑岩型钼矿床.本次就该矿床成矿岩体的地球化学及其U-Pb年代学开展相关研究.结果表明: 矿区中的成矿岩体属过铝质、高钾钙碱性系列;富集大离子亲石元素(LILE)、亏损高场强元素(HFSE),具有与南岭型花岗岩相似的地球化学特征.锆石LA-ICP-MS U-Pb定年显示,与乌和尔楚鲁图钼矿床成矿有关的花岗斑岩形成于中侏罗世((160 ± 1)Ma).因此,可推测乌和尔楚鲁图钼矿床斑岩型钼矿的成矿时代为燕山早期.综合研究认为乌和尔楚鲁图斑岩型钼矿床形成于后碰撞的构造环境.

关键词: 乌和尔楚鲁图, 斑岩型钼矿, 地球化学, 锆石U-Pb年龄

Abstract:

The newly discovered Wheerclt molybdenum deposit is located in the Erlian-Dongwuqi molybdenum metallogenic belt. Its geochemical characteristics and U-Pb age have been researched in this paper. The results show that ore-forming porphyry belongs to a peraluminous and high potassium calcium alkaline serie. The geological features, such as enrichment of large-ion lithophile elements (LILE) and the depletion of high field strength elements (HFSE), show a similar rock combination as Nanling type. U-Pb dating of the zircon from the porphyry by LA-ICP-MS indicates that the metallogenesis related granitic porphyries are formed in Middle Jurassic ((160±1) Ma) in Wheerclt molybdenum deposit. It is deduced that Wheerclt porphyry deposit was formed in Early Yanshan Period. According to a comprehensive research,the formation of Wheerclt porphyry molybdenum deposit was formed in a post-collisional setting.

Key words: Wheerclt, porphyry molybdenum, geochemistry, zircon U-Pb age

中图分类号: 

  • P595

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