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首页   >    黄金地质

内蒙古敖汉旗岱王山金矿床流体包裹体特征及矿床成因

  • 作者:
  • 齐雨宁|孙国胜|冯德胜|马冬|李雪|孙九达|吴胜宝
  • 作者单位:
  • 吉林大学地球科学学院|吉林大学地球科学学院|齐齐哈尔市龙沙区委组织部|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:

  • 中国地质调查局发展研究中心项目(WKZB1911BJM300369/006,WKZB2011BJM300175/016);国家自然科学基金项目(41572056)
  • 详细信息:

  • 作者简介:
  • 齐雨宁(1996—),女,硕士研究生,研究方向为矿物学、岩石学、矿床学;E-mail:644146879@qq.com
  • 通讯作者:
  • 冯德胜(1989—),男,工程师,硕士,从事地质工作;E-mail:1016176280@qq.com
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Fluid inclusion characteristics and genesis of Daiwangshan Gold Deposit in Aohan Banner,Inner Mongolia

  • English Author:
  • College of Earth Sciences,Jilin University|College of Earth Sciences,Jilin University|Organization Department of Longsha District Committee of Qiqihar City|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:

通过对岱王山金矿床石英、方解石中流体包裹体、黄铁矿S同位素和方解石C、O同位素特征研究,探讨了成矿流体的性质、物质来源及矿床成因。结果表明:石英中流体包裹体分为气液两相包裹体(Ⅰ型)、含CO2三相包裹体(Ⅱ型)、纯CO2相包裹体(Ⅲ型)3种类型,成矿流体总体具有中温度(171 ℃~280 ℃)、低盐度(5.4 %~11.7 %)及低密度(1.07~1.13 g/cm3)的性质,为H2O-CO2-CH4流体体系;估算成矿深度为2.1~3.0 km,属于浅成矿床。δ34S值为-1.0 ‰~-0.9 ‰,表明成矿流体中硫来源于岩浆活动;δ13CV-PDB值为-8.4 ‰~-1.5 ‰,δ18OV-SMOW值为6.3 ‰~19.7 ‰,暗示碳、氧来源具有多源性。综合成矿流体特征及成矿物质来源,认为岱王山金矿床成因类型为与古亚洲洋闭合造山有关的浅成造山型。

关键词:

岱王山金矿床;流体包裹体;矿床成因;浅成;造山型;同位素

Abstract:

Based on the study of fluid inclusion,S isotope of pyrite,and C and O isotope of calcite in quartz and calcite in Daiwangshan Gold Deposit,the properties of ore-forming fluid,material source,and deposit genesis are discussed.The results show that fluid inclusions in quartz can be pided into 3 types:gas-liquid two-phase inclusions (type Ⅰ),CO2containing three-phase inclusions (typeⅡ ),and pure CO2phase inclusions (type Ⅲ).The ore-forming fluid has the characteristics of medium temperature (171 ℃-280 ℃),low salinity (5.4 %-11.7 %),and low density (1.07-1.13 g/cm3).It is a H2O-CO2-CH4 fluid system.The metallogenic depth is estimated to be 2.1-3.0 km,belonging to the shallow deposit.The δ34S values range from -1.0 ‰ to -0.9 ‰,indicating that the sulfur in the ore-forming fluid originates from magmatic activity; the δ13CV-PDB values range from -8.4 ‰ to -1.5 ‰,and the δ18OV-SMOW values range from 6.3 ‰ to 19.7 ‰,suggesting that the sources of carbon and oxygen were multi-source.Based on the characteristics of ore-forming fluid and sources of ore-forming materials,it is considered that the genesis type of Daiwangshan Gold Deposit is a shallow orogenic type related to the closed orogenic paleo-Asian Ocean.

Keywords:

Daiwangshan Gold Deposit;fluid inclusions;deposit genesis;shallow;orogenic type;isotope