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世界地质 2017, 36(4) 1133-1143 DOI: ISSN: 1004-5589 CN: 22-1111/P

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	流体包裹体
	低硫化型浅成低温热液型矿床
	石井金银矿床
	矿床成因
	延边地区
	本文作者相关文章
	赵璇
	任云生
	郝宇杰
	陈聪
	商青青
	李晨辉
	PubMed
	Article by Zhao X
	Article by Ｒen Y
	Article by Hao Y
	Article by Chen C
	Article by Shang Q
	Article by Li C

延边地区石井金银矿床成矿流体特征及矿床成因

赵璇，任云生，郝宇杰，陈聪，商青青，李晨辉

1. 吉林大学地球科学学院，长春 130061; 2. 吉林省有色金属地质勘查局 603 队，吉林珲春 133300

摘要：为确定石井金银矿床的成矿物理化学条件和矿床成因，取主成矿阶段的石英—方解石脉，进行流体包裹体显微测温、激光拉曼光谱分析和 H、O 同位素测试。研究表明，石英和方解石中主要发育气液两相包裹体，少量为纯液相包裹体; 所测包裹体的均一温度、盐度和密度的变化范围均较大，均一温度集中于 240℃ ～280℃，盐度范围在 0. 18 ～18. 10 wt%NaCl，流体密度为 0. 57 ～0. 97 g/cm 3 ，流体压力为 9. 24 ～48. 19 MPa，估算的成矿深度介于 0. 31 ～1. 61 km 之间; 流体包裹体气相成分主要为水，成矿流体属于中低温、低盐度、低密度的 H 2 O--NaCl 体系。包裹体中 δD 变化范围为 ( －114. 8 ～－106. 1) ×10 －3 ，δ 18 O H 2 O 范围为 ( － 3. 03 ～－ 1. 43) × 10 －3 ，成矿流体主要来自大气降水。根据成矿地质条件、蚀变矿化特征、成矿流体特征以及与国内外典型矿床对比研究认为，石井矿床的成因类型为低硫化型浅成低温热液型金银矿床。

关键词：流体包裹体低硫化型浅成低温热液型矿床石井金银矿床矿床成因延边地区

Ore-forming fluid characteristics and genesis of Shijing gold-silver deposit in Yanbian area

ZHAO Xuan，ＲEN Yun-sheng，HAO Yu-jie，CHEN Cong，SHANG Qing-qing，LI Chen-hui

1. College of Earth Sciences，Jilin University，Changchun 130061，China; 2. Team 603，Bureau of Nonferrous Metal Geo-exploration of Jilin Province，Hunchun 133300，Jilin，China

Abstract: In order to determine the physical and chemical conditions and genesis of Shijing gold-silver deposit，microthermometric，laser raman spectrum and H-O isotopes analysis of fluid inclusions within the quartz-calcite vein formed in the major mineralization stage have been carried out． The results show that the majority of fluid in- clusions in the samples are gas-liquid two-phase inclusions，occasionally pure liquid inclusions． The homogenization temperature，salinity and density of these fluid inclusions vary in wide ranges，which are from 240℃ to 280℃， 0. 18 to 18. 10wt% NaCl，0. 57 to 0. 97g/cm³ ，respectively，and the pressure of the two-phase inclusions ranges from 9. 24 to 48. 19 MPa． The estimated mineralization depth of Shijing deposit is 0. 31 to 1. 61 km． The gas phase in the fluid inclusion is mainly composed of H 2 O． Fluid inclusion analyses indicate that the ore-forming fluid during the major mineralization stage is an H 2 O － NaCl system，with medium-low temperature，low salinity and low density． The δD and δ ¹⁸ O _{H 2 O} values of fluid inclusions in quartz samples from the Shijing deposit are from －114. 8 × 10 ^－3 to －106. 1 ×10^－3 and －3. 03 ×10^－3 to －1. 43 × 10 ^－3 ，respectively，indicating that the ore-forming fluid was mainly sourced from meteoric water． According to the geological condition of mineralization，alteration，and ore-forming fluid，and the comparison with the typical deposits both in China and abroad，it can be concluded that the Shijing deposit is a low-sulfidation epithermal gold-silver deposit．

Keywords: fluid inclusion low-sulfidation epithermal deposit Shijing gold-silver deposit ore genesis Yanbian area

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