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嵩县祁雨沟金矿成矿时代的40Ar-39Ar年代学证据
引用本文:王义天,毛景文,卢欣祥.嵩县祁雨沟金矿成矿时代的40Ar-39Ar年代学证据[J].地质论评,2001,47(5):551-555.
作者姓名:王义天  毛景文  卢欣祥
作者单位:1. 中国地质科学院矿产资源研究所,北京,100037
2. 河南省地质科学研究所,郑州,450053
基金项目:国家重点基础研究发展计划(973计划),G1999043211,
摘    要:采用单矿物40Ar-39Ar年代学方法,对河南祁雨沟爆破角砾岩型金矿的矿化蚀变矿物进行了高精度的定年研究.矿脉中钾长石的40Ar-39Ar年龄表明,祁雨沟金矿的主要成矿阶段发生在115~125Ma期间,成矿作用持续达10Ma.结合前人研究成果分析,区域燕山期花岗岩侵位30Ma之后祁雨沟金矿开始进入主成矿期,此时正是区域伸展构造的发育时期,深部流体活动频繁而强烈.祁雨沟金矿是中国东部金的大规模成矿作用的组成部分.

关 键 词:40Ar-39Ar年代学  成矿时代  祁雨沟金矿
修稿时间:2001年5月10日

40Ar-39Ar Dating and Geochronological Constraints on the Ore-forming Epoch of the Qiyugou Gold Deposit in Songxian County, Henan Province
WANG Yitian,MAO Jingwen,LU Xinxiang Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing.40Ar-39Ar Dating and Geochronological Constraints on the Ore-forming Epoch of the Qiyugou Gold Deposit in Songxian County, Henan Province[J].Geological Review,2001,47(5):551-555.
Authors:WANG Yitian  MAO Jingwen  LU Xinxiang Institute of Mineral Resources  Chinese Academy of Geological Sciences  Beijing
Institution:WANG Yitian,MAO Jingwen,LU Xinxiang Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing,Institute of Geological Sciences of Henan Province,Zhengzhou
Abstract:This paper presents a 40Ar-39Ar chronological study of the Qiyugou gold deposit, an explosion-breccia type deposit in the Xiong'ershan area, Songxian County, Henan Province. The 40Ar-39Ar ages of K-feldspar formed in the ore veins show that the main metallogenic stage occurred during 115~125 Ma, and the gold mineralization lasted 10 Ma. Combined with the studies by other researchers, the authors suggest that it took about 30 Ma from the formation of regional granite to the development of the explosion-breccia and the beginning of the main metallogenic epoch. The Qiyugou gold deposit got into form at the same time as the development of the regional extensional tectonics, when the activity of deep fluids became intensive and frequent. The deposit is a component part of the large-scale gold mineralization in late Mesozoic in eastern China.
Keywords:40Ar-39Ar dating  metallogenic epoch  Qiyugou gold deposit
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