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大兴安岭北段霍洛台Ⅰ区南铜钼矿床成矿流体特征及矿床成因

  • 李华伟|周丹|李碧乐|孙永刚|于润涛|杨佰慧|李治华
  • 作者单位:
  • 吉林大学地球科学学院|吉林省众诚油页岩集团有限公司|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:

  • 黑龙江省国土资源科研项目(黑国土科研201605);黑龙江省地质勘查科研项目(黑地勘科〔2017〕04号);吉林省科技发展计划项目(20180101089jc)
  • 详细信息:

  • 作者简介:
  • 李华伟(1994—),男,河南周口人,硕士研究生,研究方向为矿床学、岩石学、矿物学;长春市建设街2199号,吉林大学地球科学学院,130061;E-mail:1827633540@qq.com
  • 通讯作者:
  • E-mail:libl@jlu.edu.cn,13353277179
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Ore-forming fluid characteristics and genesis of copper-molybdenum deposit in the southern Huoluotai AreaⅠin the Greater Khingan Mountains

  • English Author:
  • College of Earth Sciences,Jilin University|Jilin Zhongcheng Oil Shale Group Co.,Ltd.|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:

霍洛台Ⅰ区南铜钼矿床位于大兴安岭中北段的铁、铜、金、钼、钨成矿区(带)上,其成矿阶段由早至晚分为4个阶段:磁铁矿-石英-钾长石阶段(Ⅰ)、石英-辉钼矿阶段(Ⅱ)、石英-多金属硫化物阶段(Ⅲ)、石英-萤石-方解石阶段(Ⅳ)。石英-辉钼矿阶段与石英-多金属硫化物阶段为主要成矿阶段。流体包裹体类型有含CO2三相包裹体(C型)、含子矿物包裹体(S型)、富气相包裹体(V型)、富液相包裹体(L型)。成矿流体总体属于高盐度的H2O-NaCl-CO2体系。该矿床中的辉钼矿主要发育在钾硅化带中,形成于早阶段高温、高盐度流体环境;黄铜矿等金属硫化物主要发育于绢英岩化带中,形成于中温富液相流体环境。辉钼矿的沉淀主要与沸腾作用和温度降低有关,黄铜矿等金属硫化物的沉淀主要由温度降低和大?旌纤隆W酆戏治鋈衔袈逄Ⅰ区南铜钼矿床为典型的斑岩型矿床。

关键词:

铜钼矿床;成矿流体;流体包裹体;矿床成因;斑岩型矿床;大兴安岭北段;霍洛台Ⅰ区

Abstract:

Copper-molybdenum deposit in the southern Huoluotai Areaare located on the iron,copper,gold,molybdenum and tungsten metallogenic zone(belt) sitting in the central north section of Greater Khingan Mountains.The metallogenic stages are pided into 4 phases in time:stageis magnetite-quartz-potassium feldspar stage,stage is quartz-molybdenite,stageis quartz-polymetallic sulfide,and stage is quartz-fluorite-calcite.Quartz-molybdenite stage and quartz-polymetallic sulfide stage are the main metallogenic stages.The fluid inclusions are mainly composed of CO2bearing 3phase inclusion(C type),submineralbearing inclusionS type),gas-rich inclusionV type),and liquidrich inclusionsL type.Oreforming fluids generally belong to high salinity H2O-NaCl-CO2 system.The molybdenite in the deposit mainly develops in the potassium silicification zone,and was formed in the early stage of high temperature and high salinity fluid environment; polymetallic sulfide like chalcopyrite mainly develops in the sericitization zone,and was formed in the medium temperature liquidrich fluid environment.Molybdenite precipitation is mainly related to boiling and temperature reduction,polymetallic sulfide precipitation like chalcopyrite is mainly caused by temperature reduction and atmospheric water mixing.Comprehensive analysis thinks the copper-molybdenum deposit in the southern Huoluotai Areais a typical porphyry deposit.

Keywords:

copper-molybdenum deposit;oreforming fluid;fluid inclusion;deposit genesis;porphyry deposit;north section of Greater Khingan Mountains;Huoluotai AreaⅠ