| 安徽铜陵新桥Cu-Au-Fe-S矿床黄铁矿Re-Os定年及成矿意义 |
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| 引用本文： | 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[J].地质科学,2009,44(1):183-192. |
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| 作者姓名： | 谢建成 杨晓勇 杜建国 杜小伟 肖益林 屈文俊 孙卫东 |
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| 作者单位： | 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 |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 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.
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| 关 键 词： | Re-Os 同位素定年 黄铁矿 新桥矿床 安徽铜陵 |
| 收稿时间： | 2007-10-29 |
| 修稿时间： | 2007-10-29; |
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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| Xie Jiancheng,Yang Xiaoyong,Du Jianguo,Du Xiaowei,Xiao Yilin,Qu Wenjun,Sun Weidong.Re-Os precise dating of pyrite from the Xinqiao Cu-Au-Fe-S Deposit in Tongling.Anhui and its implications for mineralization[J].Chinese Journal of Geology,2009,44(1):183-192. |
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| Authors: | Xie Jiancheng Yang Xiaoyong Du Jianguo Du Xiaowei Xiao Yilin Qu Wenjun Sun Weidong |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Re-Os |
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