豫西吉家洼金矿床成矿时代和成矿物质来源:来自闪锌矿Rb-Sr同位素年龄和Pb同位素的证据
DOI:
作者:
作者单位:

河北省地质调查院,中国地质科学院矿产资源研究所,河南省地质矿产勘查开发局 第一地质矿产调查院,河北省地质调查院,河北省地质调查院

作者简介:

通讯作者:

中图分类号:

基金项目:

中国地质调查局地质调查项目


Metallogenic Epoch and Source of Ore-Forming Material of the Jijiawa Au Deposit, Western Henan Province:Evidence from Rb-Sr Dating and Pb Isotopes
Author:
Affiliation:

Hebei Institute of Geological Survey, Shijiazhuang,Institute of Mineral Resources, Chinese Academy of Geological Sciences,No.1 Institute of Geological and Mineral Resources Survey of Henan,Hebei Institute of Geological Survey, Shijiazhuang,Hebei Institute of Geological Survey, Shijiazhuang

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    豫西吉家洼金矿位于熊耳山金多金属矿集区西部,是一构造蚀变岩石英脉型金矿床。矿体产于近南北向断裂带中,在倾向上呈“Y”字型分布,矿化以细脉网脉状、浸染状黄铁矿化蚀变岩型金矿为主,其次为石英脉型金矿。热液成矿过程包括4个矿化阶段,黄铁矿石英阶段(Ⅰ)、石英黄铁矿阶段(Ⅱ)、石英多金属硫化物阶段(Ⅲ)和石英碳酸盐阶段(Ⅳ)。本次工作对吉家洼金矿床主要成矿阶段(Ⅲ)的闪锌矿进行了RbSr同位素测年研究,以限定成矿时代。结果获得RbSr等时线年龄为118.2±2.4Ma,表明矿床形成于早白垩世。该年龄与熊耳山地区中的庙岭、祁雨沟、公峪等金矿床的成矿年龄基本一致,对于整个熊耳山地区的金矿成矿年龄具有一定的约束意义。锶铅同位素研究结果显示,吉家洼金矿的成矿物质为壳幔混源,新太古界太华群基底及其重熔形成的花岗岩体可能为铅同位素的主要物源。我们认为,吉家洼金矿床是熊耳山地区在早白垩世区域性强烈的构造岩浆流体活动事件的产物,是整个中国东部金的大规模成矿作用的组成部分。

    Abstract:

    The Jijiawa gold deposit, located in the western part of the Xiong’ershan gold polymetallic ore district, Henan Province, is typical of tectonically altered rock quartz vein type gold deposit. Orebodies are hosted mainly within nearly NS trending fault zone and are distributed in the form of “Y” shape. Mineralization is dominated by veinveinlet and disseminated pyritized altered rock gold deposits, with minor being quartz vein type gold deposits. The hydrothermal ore forming process can be divided into four stages: pyrite quartz vein stage (I), quartz pyrite vein stage (II), quartz polymetallic sulfides stage (III), and quartz carbonate vein stage (IV). This study carried out Rb-Sr isotopic dating for the sphalerites from main mineralization stage of the Jijiawa Au deposit to restrain the ore forming time. The yielded isochron age of 118.2±2.4Ma suggests that the deposit was formed in Early Cretaceous. The age is basically in agreement with that of Miaoling, Qiyugou, Gongyu and other gold deposits in the Xiong’ershan area, which is of significance in constraining the ore forming age in the Xiong’ershan area. Sr and Pb isotope analysis shows that the Jijiawa Au deposit had a mixing origin of the materials from crust and mantle, with the Early Cretaceous granite likely contributing main metallogenic materials. In the context of regional geology, we suggest that the Jijiawa Au deposit was the product of the regional intensive tectono magmatic fluid activity in the Xiong’ershan area in Early Cretaceous, and it is also a component part of the large scale gold mineralization in eastern China.

    参考文献
    相似文献
    引证文献
引用本文

张兴康,叶会寿,颜正信,李思伟,樊玉朋,张福斌.2018.豫西吉家洼金矿床成矿时代和成矿物质来源:来自闪锌矿Rb-Sr同位素年龄和Pb同位素的证据[J].地质学报,92(5):1003-1018.
ZHANG Xingkang, YE Huishou, YAN Zhengxin, LI Siwei, FAN Yupeng, ZHANG Fubin.2018. Metallogenic Epoch and Source of Ore-Forming Material of the Jijiawa Au Deposit, Western Henan Province:Evidence from Rb-Sr Dating and Pb Isotopes[J]. Acta Geologica Sinica,92(5):1003-1018.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2017-03-13
  • 最后修改日期:2017-06-13
  • 录用日期:2017-06-15
  • 在线发布日期: 2018-05-11
  • 出版日期: