安徽铜陵新桥Cu-Au-Fe-S矿床黄铁矿Re-Os定年及成矿意义

谢建成; 杨晓勇; 杜建国; 杜小伟; 肖益林; 屈文俊; 孙卫东

安徽铜陵新桥Cu-Au-Fe-S矿床黄铁矿Re-Os定年及成矿意义

- 1.
  中国科学技术大学地球和空间科学学院, 合肥, 230026
- 2. 安徽省地质调查院, 合肥, 230001
- 3. 国家地质实验测试中心, 北京, 100037
- 4. 中国科学院广州地球化学研究所, 广州, 510640

详细信息

作者简介:
谢建成，男，1973年10月生，博士，地球化学专业.

中图分类号: P588.1

收稿日期: 2007-10-29

修回日期: 2008-05-29

刊出日期: 2009-01-25

Re-Os precise dating of pyrite from the Xinqiao Cu-Au-Fe-S Deposit in Tongling.Anhui and its implications for mineralization

- 1.
  School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026
- 2. Anhui Academy of Geological Survey, Hefei 230001
- 3. National Research Center of Geoanalysis, Chinese Academy of Ceologicad Sciences, Beijing 100037
- 4. Cuangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640

Received Date: 29 October 2007

Revised Date: 29 May 2008

Publish Date: 25 January 2009

摘要

摘要: 安徽铜陵地区是长江中下游Cu-Au-Fe-S成矿带中的一个重要成矿区，新桥大型Cu-Au-Fe-S矿床为其重要的矿床之一.运用Re-Os同位素定年方法对该矿床中矿石的黄铁矿进行了精确定年测定，首次获得了黄铁矿的Re-Os等时线年龄为126±11Ma，初始OS值1.2±1.9（MSWD=2.6），属早白垩世，代表了铁硫化物的成矿年龄.结合前人的精确同位素定年结果，认为铜陵地区存在两种成矿事件，一种是与Cu-Au-Mo矿有关的成矿事件，代表的铜钼金硫化物的成矿年龄为138.0～140.0 Ma；另一种与铁矿有关的成矿事件，代表的铁硫化物的成矿年龄为112.6～126 Ma.
- Re-Os /
- 同位素定年 /
- 黄铁矿 /
- 新桥矿床 /
- 安徽铜陵
Abstract: The Tongling region of Anhui province is an important ore district of the famous MiddleLower Yangtze Cu-Au-Fe-S metallogenic belt in China.The Xinqiao Cu-Au-Fe-S ore deposit is a representative one in Tongling region.In this study,6 pyrite samples from pyrite ore were collected in Xinqiao Ore Deposit for Re-Os precise dating.The results yielded a Re-Os isochron age of 126±11 Ma with initial Os value being 1.2±1.9(MSWD=2.6),which recorded the ore-forming age of Fe-sulfide.To synthesize other isotopic datings, the paper thought that there exited two ore-forming events in Tongling region:one was related to Cu-Au-Mo deposits with ore-forming age being 138.0~140.0 Ma, and another was related to iron deposits with oreforming age being 112.6~126 Ma.
- Re-Os isotopic dating /
- Pyrite /
- The Xinqiao Ore Deposit /
- Tongling in Anhui /

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安徽铜陵新桥Cu-Au-Fe-S矿床黄铁矿Re-Os定年及成矿意义

作者简介: 谢建成，男，1973年10月生，博士，地球化学专业.

Re-Os precise dating of pyrite from the Xinqiao Cu-Au-Fe-S Deposit in Tongling.Anhui and its implications for mineralization

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作者简介:
谢建成，男，1973年10月生，博士，地球化学专业.