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首页   >    黄金地质

黑龙江省黑河市五道沟地区金矿化特征及矿床成因

  • 张浩文|王可勇|马万里|孙清飞|赵晨光
  • 作者单位:
  • 吉林大学地球科学学院|吉林大学地球科学学院|吉林大学地球科学学院|吉林大学地球科学学院|吉林大学地球科学学院
  • 基金项目:

  • 东北亚矿产资源评价自然资源部重点实验室开放基金项目(DBY-ZZ-18-12);中国地质调查局中国科学技术部项目(2017YFC0601304)
  • 详细信息:

  • 作者简介:
  • 张浩文(1996—),男,黑龙江齐齐哈尔人,硕士研究生,研究方向为矿床学;长春市建设街2199号,吉林大学地球科学学院,130061;E-mail:zhanghw19@mails.jlu.edu.cn
  • 通讯作者:
  • E-mail:wangky@jlu.edu.cn,13069004095
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Characteristics and deposit genesis of gold mineralization in Wudaogou area,Heihe City,Heilongjiang Province

  • English Author:
  • College of Earth Sciences,Jilin University|College of Earth Sciences,Jilin University|College of Earth Sciences,Jilin University|College of Earth Sciences,Jilin University|College of Earth Sciences,Jilin University
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

五道沟地区地处中亚造山带东部,黑河—贺根山断裂西北部,构造、岩浆活动强烈,主要发育印支期侵入体和2组北东向断裂,为金矿化提供了有利的地质条件。该地区金矿化以石英脉型为主,成矿作用可分为石英-黄铁矿-自然金阶段(Ⅰ)、石英-黄铁矿-黄铜矿-闪锌矿阶段(Ⅱ)、方解石-贫硫化物阶段(Ⅲ)3个阶段,且伴随绿泥石化和绢云母化蚀变。流体包裹体研究结果表明:主要发育气液两相包裹体(L型)、含CO2包裹体(C型)和富气相包裹体(V型)3种类型包裹体;成矿Ⅰ、Ⅱ、Ⅲ阶段由中高温、中等盐度的CO2-NaCl-H2O体系逐渐演化为低温、低盐度的NaCl-H2O体系,期间压力骤降引发的流体沸腾作用是金属矿物沉淀的主要原因。氢-氧同位素测试结果表明:δDV-SMOW与δ18OH2O分别为-128.5 ‰~-99.6 ‰和-2.3 ‰~6.5 ‰,暗示成矿流体主要来源于岩浆水,同时伴随少量的大气降水混入。

关键词:

金矿化特征;热液脉型金矿化;流体包裹体;五道沟地区;黑龙江省

Abstract:

Wudaogou area is located in the eastern section of the Central Asian orogenic belt,and the northwestern section of Heihe-Hegenshan fault.There are intense structural and magmatic activities in the area and develop Indosinian intrusions and 2 groups of NE-trending faults,which are favorable geologic conditions for gold mineralization.The gold mineralization in the area is dominated by quartz veins,and the mineralization can be pided into quartz-pyrite-gold stage (Ⅰ),quartz-pyrite-chaloopyrite-sphalerite stage (Ⅱ),and calcite-poor sulfide stage (Ⅲ);and associated with the alteration of chloritization and sericitization.Research on fluid inclusions shows that there are 3 types of fluid inclusions:gas-liquid two-phase inclusions(L-type),CO2-containing inclusions(C-type),and gas-rich inclusions(V-type).The Ⅰ,Ⅱ and Ⅲ stages of mineralization gradually evolved from the CO2-NaCl-H2O system with medium high temperature and medium salinity to the NaCl-H2O system with low temperature and low salinity.

Keywords:

characteristics of gold mineralization;hydrothermal vein type gold mineralization deposit;fluid inclusion;Wudaogou area;Heilongjiang Province