青海祁漫塔格虎头崖多金属矿区岩体热年代学研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:


Thermochronology of Hutouya Skarn-Type Copper-Lead-Zinc Polymetallic Ore District in the Qimantage Area Qinghai Province
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    虎头崖铜铅锌多金属矿床是青海祁漫塔格地区典型的与印支期岩浆侵入活动有关的接触交代矿床,矿区内出露多个不同时代的含碳酸盐地层,金属成矿元素组合复杂,中酸性侵入岩产状多变、岩性多样,成矿岩体及其成矿能力的判别一直制约着该矿区及区域的找矿勘查工作。本文基于详细的野外地质调查,开展了岩体热年代学和岩石地球化学研究。利用LA-MC-ICP-MS锆石U-Pb法,获得二长花岗岩体的年龄为230.3±3.7 Ma(n=13,MSWD=1.4);利用40Ar-39Ar法,获得二长花岗岩中黑云母和斜长石矿物的坪年龄分别为229.6±2.3 Ma和219.3±1.8 Ma,厘定成岩时代为印支期。对二长花岗岩中不同矿物的岩体冷速率计算结果表明,虎头崖矿区二长花岗岩冷速率相对较快,其热效应较大,具有较大的成矿潜力。二长花岗岩为高钾钙碱性系列岩石,源于古老地壳物质的深熔或重熔,并可能有幔源物质的加入。

    Abstract:

    Located in the Qimantage area, Qinghai Province, the Hutouya is a typical skarn-type lead-zinc polymetallic ore district consisting of contact and exocontact substyles, relationship with Indosinian intrusive rocks. In this ore district, a plurality of containing carbonate stratum outcropped in different ages. Ore-forming metal element combinations were complicated. Occurrences of intermediate-acidic intrusive rocks were changeable and lithology were diversiform. But ore-forming rock bodies and abilities restricted perambulation of ore districts and areas. This thesis are based on field geological investigation, we studies rock body thermochronology and rock geochemistry. The LA-MC-ICP-MS U-Pb dating of zircon from adamellite yield ages of 230.3±3.7 Ma (n=13, MSWD=1.4) of Sample HTY016. And 40Ar-39Ar dating yield plateau ages of 229.6±2.3 Ma from biotite and 219.3±1.8 Ma from plagioclase. The petrogenic age is Indosinian. The rock body condensing rate of different minerals from adamellite shows that the adamellite in Hutouya is rather quick and the thermal effect is much larger, so the metallogenic potential much larger. The adamellite is high-K calc-alkaline series and resulted from deep penetration or deep penetration of antique crust joined with mantle materials.

    参考文献
    相似文献
    引证文献
引用本文

瞿泓滢,丰成友,裴荣富,何书跃,李大新,刘建楠,王辉,周建厚.2015.青海祁漫塔格虎头崖多金属矿区岩体热年代学研究[J].地质学报,89(3):498-509.
QU Hongying, FENG Chengyou, PEI Rongfu, HE Shuyue, LI Daxin, LIU Jiannan, WANG Hui, ZHOU Jianhou.2015. Thermochronology of Hutouya Skarn-Type Copper-Lead-Zinc Polymetallic Ore District in the Qimantage Area Qinghai Province[J]. Acta Geologica Sinica,89(3):498-509.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2014-12-13
  • 最后修改日期:2015-01-19
  • 录用日期:2015-01-19
  • 在线发布日期: 2015-04-01
  • 出版日期: