• captcha

中国科技核心期刊

美国化学文摘社(CAS)数据库

美国EBSCO学术数据库

日本科学技术振兴机构数据库(JST)

期刊导读

首页   >    黄金地质

康滇地轴中段西缘黎溪式铜矿床流体包裹体研究

  • 胡杰|王兆成|周福篯|史少飞|?嘈窕?
  • 作者单位:
  • 四川省地质矿产勘查开发局区域地质调查队&四川省容大矿业集团有限公司|四川省地质矿产勘查开发局区域地质调查队&四川省容大矿业集团有限公司|四川省地质矿产勘查开发局区域地质调查队&四川省容大矿业集团有限公司|四川省容大矿业集团有限公司|四川省地质矿产勘查开发局区域地质调查队
  • 基金项目:

  • 四川省地质勘查基金项目(DZ202203);四川省容大矿业集团有限公司科研项目(容大科技科字〔2023〕02号)
  • 详细信息:

  • 作者简介:
  • 胡杰(1984—),男,高级工程师,硕士,从事矿产勘查和矿区水工环调查工作;E-mail:106862386@qq.com
  • 通讯作者:
  • 王兆成(1968—),男,教授级高级工程师,从事矿产勘查及区域地质调查工作;E-mail:1377401712@qq.com
  • PDF下载

Fluid inclusion study of the Lixi-type copper deposits on the western margin of the middle section of Kang-Dian geological axis

  • English Author:
  • Regional Geological Survey Brigade of Sichuan Bureau of Geology & Mineral Resources&Sichuan Rongda Mining Group Co.,Ltd.|Regional Geological Survey Brigade of Sichuan Bureau of Geology & Mineral Resources&Sichuan Rongda Mining Group Co.,Ltd.|Regional Geological Survey Brigade of Sichuan Bureau of Geology & Mineral Resources&Sichuan Rongda Mining Group Co.,Ltd.|Sichuan Rongda Mining Group Co.,Ltd.|Regional Geological Survey Brigade of Sichuan Bureau of Geology & Mineral Resources
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

为研究黎溪式铜矿床成因,选取了3处典型黎溪式铜矿床的流体包裹体进行岩相学、显微测温及激光拉曼成分测试研究。流体包裹体岩相学及显微测温结果显示,主成矿期包裹体中发育?毫较唷⒑涌笪铩⒑禾CO2、纯液体和纯气体等5类包裹体;气液两相包裹体完全均一温度(平均值191.42 ℃)和含子矿物包裹体完全均一温度(平均值170.33 ℃)基本一致,但盐度差异较大,说明成矿流体发生过沸腾作用,该作用对成矿起到了重要作用。成矿后期流体包裹体完全均一温度为319.00 ℃~425.00 ℃,明显高于主成矿期完全均一温度,显示出后期热液对成矿流体的改造作用。激光拉曼成分测试结果显示,成矿流体中气相成分以CH4和H2O为主,其次为CO2,偶见N2和纯气相CO2,成矿流体属于具有还原性的H2O - NaCl - CH4 - CO2 ± N2体系。根据黎溪式铜矿床产出地质条件、矿化蚀变特征,并综合流体包裹体研究,认为黎溪式铜矿床属于沉积-改造型矿床。

关键词:

流体包裹体;黎溪式铜矿床;显微测温;激光拉曼;完全均一温度;矿床成因类型

Abstract:

In order to study the genesis of Lixi-type copper deposits,fluid inclusions from 3 typical Lixi-type copper deposits were selected for petrographic,microthermometric,and laser Raman compositional analysis.The petrographic and microthermometric results revealed 5 types of inclusions in the mineralizing stage,including gas-liquid two-phase inclusions,daughter mineral-bearing inclusions,liquid CO2-bearing inclusions,pure liquid inclusions,and pure gas inclusions;the gas-liquid two-phase inclusions and daughter mineral-bearing inclusions showed consistent fully homogeneous temperatures (average 191.42 ℃ and 170.33 ℃,respectively),but with significant salinity variations,indicating boiling of the ore-forming fluids and its importance in mineralization;the fully homogeneous temperatures of the late-stage fluid inclusions ranged from 319.00 ℃ to 425.00 ℃,significantly higher than those of the main mineralizing stage,indicating the modification of the mineralizing fluids by late-stage hydrothermal activity.Laser Raman compositional analysis results showed that the gas phase composition in the mineralizing fluids is dominated by CH4 and H2O,followed by CO2,with occasional presence of N2 and pure gas-phase CO2,suggesting a reducing H2O-NaCl-CH4-CO2±N2 system.Based on the geological conditions and mineralization alteration characteristics of the Lixi-type copper deposits,as well as the study of fluid inclusions,the Lixi-type copper deposits are classified as sedimentary-reformed deposits.

Keywords:

fluid inclusions;Lixi-type copper deposits;microthermometry;laser Raman;fully homogeneous temperature;deposit genesis type