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| 吉林省海沟石英脉型金矿床流体包裹体特征及地质意义 | |
| 引用本文： | 张松,曾庆栋,刘建明,汪在聪,王永彬,任德奎,高吉河.吉林省海沟石英脉型金矿床流体包裹体特征及地质意义[J].岩石学报,2011,27(5):1287-1298. |
| 作者姓名： | 张松 曾庆栋 刘建明 汪在聪 王永彬 任德奎 高吉河 |
| 作者单位： | 1. 中国科学院地质与地球物理研究所,矿产资源研究重点实验室,北京,100029;中国科学院研究生院,北京,100049 2. 中国科学院地质与地球物理研究所,矿产资源研究重点实验室,北京,100029 3. 吉林海沟黄金矿业有限责任公司,吉林,133600 |
| 基金项目： | 本文受全国危机矿山接替资源综合研究项目(20089931)资助. |
| 摘 要： | 海沟金矿床地处夹皮沟-海沟成矿带东南端,为典型的石英脉型金矿。该矿床产于海西期花岗杂岩体中,由多条含金石英脉组成。成矿过程可分为4个阶段:Ⅰ. 钾长石-石英脉阶段;II. 乳白色石英-(少)黄铁矿-(少)金阶段;III. 多金属硫化物-石英-金阶段;IV. 碳酸盐-石英-黄铁矿阶段。流体包裹体研究表明,海沟金矿各阶段流体包裹体存在一定差异,早期成矿阶段(第Ⅱ阶段)以H2O-NaCl包裹体(Ⅰ类)为主,偶见含子晶包裹体(Ⅳ类);主成矿阶段(第Ⅲ阶段)以CO2-H2O-NaCl包裹体(II类)为主,并含有少量纯CO2包裹体(III类);成矿后阶段(第Ⅳ阶段)以H2O-NaCl包裹体(Ⅰ类)为主。早期成矿阶段、主成矿阶段、成矿后阶段均一温度范围分别为227~497℃、189~427℃、130~267℃,对应盐度分别为0.53%~10.23% NaCleqv、0.35%~9.23% NaCleqv、0.18%~3.27% NaCleqv。早期成矿阶段和主成矿阶段包裹体均一温度、盐度相对较高,成矿后阶段包裹体均一温度、盐度明显降低;在空间上,主成矿阶段矿床深部包裹体的盐度较矿床浅部偏高。拉曼和气相色谱结果显示,包裹体气相成分以H2O、CO2、N2、CH4、C2H6为主,并含有少量H2S,成矿流体为低盐度的H2O-CO2-NaCl±CH4流体;包裹体液相离子成分主要为Na+、K+、Ca2+、Cl-,个别包裹体中含有少量Mg2+、F-离子。主成矿阶段不同类型、不同相比包裹体均一温度相近,显示不混溶特征。流体减压引起的不混溶作用可能是海沟金矿金沉淀的主要原因。 |
| 关 键 词： | 石英脉型金矿 流体包裹体 成矿流体演化 海沟 |
| 收稿时间： | 2010/11/25 0:00:00 |
| 修稿时间： | 2011/2/14 0:00:00 |
The characteristics and its geological significance of fluid inclusions in Haigou lode gold deposit, Jilin Province. |
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| ZHANG Song,ZENG QingDong,LIU JianMing,WANG ZaiCong,WANG YongBin,REN DeKui and GAO JiHe.The characteristics and its geological significance of fluid inclusions in Haigou lode gold deposit, Jilin Province.[J].Acta Petrologica Sinica,2011,27(5):1287-1298. | |
| Authors: | ZHANG Song ZENG QingDong LIU JianMing WANG ZaiCong WANG YongBin REN DeKui and GAO JiHe |
| Institution: | Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China;China Gold Group Haigou Mining Co., LTD., Jilin 133600, China;China Gold Group Haigou Mining Co., LTD., Jilin 133600, China |
| Abstract: | Haigou gold deposit,located in the southeast of the Jiapigou-Haigou gold belt in Jilin Province,is a typical lode gold deposit.It is hosted by Hecynian granitoid complex,and consists of gold-bearing quartz veins.It can be devided into four ore-forming stages:I,quartz-K-feldspar;II,quartz-pyrites,occasionally with gold;III,polymetallic sulfides-quartz-gold;and IV,carbonate-quartz-pyrite stage.Four types of fluid inclusions are identified in auriferous quartz veins:(1)H2O-CO2-NaCl inclusions;(2)CO2 inclusions... |
| Keywords: | Lode gold deposit Fluid inclusions Evolution of ore-forming fluid Haigou |
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