西藏马攸木金矿床含金脉石英的<sup>40</sup>Ar/<sup>39</sup>Ar快中子活化定年及其地质意义

西藏马攸木金矿床含金脉石英的⁴⁰Ar/³⁹Ar快中子活化定年及其地质意义

基金项目:

国家自然科学基金项目(40472058)、973项目“印度与亚洲大陆主碰撞成矿带作用”(2002CB412600)下属课题“西藏雅鲁藏布江结合带西段成矿地质背景及金属矿床类型研究”(2002CB412600)、西藏自治区重点科研项目(2004-66)。

详细信息

摘要: 西藏马攸木金矿床金矿化晚阶段含金硫锑铅矿脉石英样品⁴⁰Ar/³⁹Ar快中子活化法坪年龄为22.46±1.20 Ma,坪年龄代表石英的结晶年龄。测试结果表明,马攸木金矿床金的成矿作用可能延续到喜马拉雅中晚期。
- ⁴⁰Ar/³⁹Ar法定年 /
- 石英 /
- 金矿床 /
- 马攸木 /
- 西藏
Abstract: The quartz from the gold-bearing quartz veins of boulangerite sample formed during the later stages of gold mineratization in the Mayum gold deposit,Xizang was dated by using the ⁴⁰Ar/³⁹Ar fast-neutron activation technique,which gave a plateau age of 22.46±1.20 Ma.This plateau age represents the age of quartz（crystallization）.This determination shows that the mineralization of the Mayum gold deposit may be traced back to the middle and late Himalayan.
- ⁴⁰Ar/³⁹Ar dating /
- quartz /
- gold deposit /
- Mayum /
- Xizang