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

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。

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.