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首页   >    黄金地质

吉林白山荒沟山金矿床流体包裹体特征及其地质意义

  • 张天旭|王力|陈晓航|刘响
  • 作者单位:
  • 吉林大学地球科学学院|吉林大学地球科学学院|河北省地质调查院|河北省地质调查院
  • 基金项目:

  • 吉林省地质勘查基金项目(2018-30)
  • 详细信息:

  • 作者简介:
  • 张天旭(1994—),男,吉林四平人,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:953080482@qq.com
  • 通讯作者:
  • E-mail:wamg_l@jlu.edu.cn,18686685212
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Fluid inclusion characteristics and their geological significance in Huanggoushan Gold Deposit,Baishan City,Jilin Province

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

摘要:

荒沟山金矿床位于吉林省临江市西南部,华北板块北缘东段,古元古代辽吉活动带中部,鸭绿江深大断裂北侧。矿体主要赋存在古元古界老岭群珍珠门组、闪长玢岩和闪长岩中,受韧—脆性剪切带和脆性断裂联合控制。通过对主成矿阶段矿石石英中流体包裹体进行显微测温,结果表明:主成矿阶段流体包裹体均为气液两相包裹体,属NaCl-H2O体系;流体包裹体完全均一温度为140.9 ℃~229.6 ℃,盐度为4.48 %~12.42 %,密度为0.841~0.935 g/cm3,成矿压力为10~24 MPa,成矿深度为1.0~2.4 km,显示成矿具有低盐度、低密度、中低温、浅成的特点。综合分析认为,荒沟山金矿床的形成与古元古代热水喷流沉积作用有关,是燕山晚期构造热事件形成的中低温热液脉型金矿床,且经历了不同程度的变质变形改造。

关键词:

流体包裹体;矿床地质特征;矿床成因;变质变形改造;荒沟山金矿床

Abstract:

The Huanggoushan Gold Deposit is located in the southwest of Linjiang City,Jilin Province,the east of the north margin of the North China plate,the middle of the Paleoproterozoic Liaoji active belt,the north of Yalujiang deep fault.The ore bodies mainly occur in the Paleoproterozoic Laoling group Zhenzhumen formation,diorite porphyrite and diorite,which are jointly controlled by the ductile-brittle shear zone and brittle fracture.The fluid inclusions in quartz of the main mineralization stage ores are analyzed by micro thermometry.The results show that the fluid inclusions in the main mineralization stages are gas-liquid two-phase inclusions and belong to the NaCl-H2O system.The complete homogenization temperature of the fluid inclusion is 140.9 ℃-229.6 ℃,the salinity is 4.48 %-12.42 %,and the density is 0.841-0.935 g/cm3,the mineralization pressure is 10-24 MPa,mineralization depth is 1.0-2.4 km,indicating the characteristics of low salinity,low density,medium-low temperature and hypabyssal.Comprehensive analysis thinks that the formation of Huanggoushan Gold Deposit is associated with Paleoproterozoic hydrothermal exhalation sedimentation and is a medium-low temperature hydrothermal vein type gold deposit resulted from late Yanshanian tectonic thermal events which underwent different degrees of metamorphism and deformation.

Keywords:

fluid inclusion;deposit geological characteristics;deposit genesis;metamorphism and deformation transformation;Huanggoushan Gold Deposit