吉林中部锑矿床成矿流体特征及其意义——以大秃顶子、植林、幸福屯锑矿为例

doi:10.13686/j.cnki.dzyzy.2023.05.002

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摘要吉林中站地区分布着一系列金、锑、铜镍矿床,成矿地质条件良好.对大秃顶子、幸福屯、植林3个锑矿床辉锑矿主成矿期石英流体包裹体进行显微测温研究和稳定同位素(H、O、S)分析,结果表明,流体包裹体主要发育有3种类型:Ⅰ型富液两相(L_H2O+V_H2O)包裹体,Ⅱ型纯液相(H₂O)包裹体,Ⅲ型气相包裹体.包裹体均一温度范围为121.5~281.5℃,盐度范围为3.39%~10.73%,估算密度范围为0.833~0.985 g/cm³,成矿流体为中低温、低盐度、低密度.H-O同位素组成特征显示,δ¹⁸O变化范围为15.71‰~18.28‰,δD变化范围为-111.1‰~-83.8‰,成矿流体主要是岩浆热液,后期有大气降水加入.黄铁矿的δ³⁴S范围在-8.25‰~-3.86‰,辉锑矿的δ³⁴S范围在-8.18‰~-7.67‰,δ34S值范围较为集中,明显区别于岩浆硫,成矿物质主要来源于地壳.锆石U-Pb测年结果显示,区内侵入岩的结晶年龄为205±2.7 Ma、192±1.9 Ma、195±1.9 Ma.锑矿床形成与岩浆热液联系密切,矿床成矿时代为晚三世-早侏罗世.吉林中部锑矿床成因类型为浅成中低温热液型矿床.

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	许国雨
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	朱荣利

关键词 ：锑矿床, 流体包裹体, 稳定同位素, 成矿时代, 矿床成因, 吉林省

Abstract：A series of gold, antimony and copper-nickel deposits are distributed in central Jilin Province with favorable metallogenic geological conditions. The study of microscopic temperature measurement and stable isotopes(H, O and S) for the quartz fluid inclusions in the major metallogenic period of stibnite in Datudingzi, Xingfutun and Zhilin antimony deposits shows that there are three main types of fluid inclusions including Type-I of liquid-rich two-phase(L_H2O+V_H2O) inclusion, Type-II of pure liquid phase(H₂O) inclusion, and Type-III of gas-phase inclusion, with the homogenization temperature of 121.5-281.5℃, salinity of 3.39%-10.73%, and estimated density of 0.833-0.985 g/cm³. The ore-forming fluid is characterized by low-medium temperature, low salinity and low density. The H-O isotopic composition characteristics show that δ¹⁸O is 15.71‰-18.28‰, and δD from -111.1‰ to -83.8‰. The ore-forming fluid is dominated by magmatic hydrothermal fluid, mixed with later atmospheric precipitation. The δ³⁴S of pyrite ranges from -8.25‰ to -3.86‰, and that of stibnite from -8.18‰ to -7.67‰. The range of δ³⁴S values is relatively concentrated, obviously different from magmatic sulfur. The metallogenic materials are mainly derived from the crust. The zircon U-Pb dating results reveal that the crystallization ages of the intrusive rocks are 205±2.7 Ma, 192±1.9 Ma and 195±1.9 Ma respectively. The formation of antimony deposit is closely related to magmatic hydrothermal fluid, aged in Late Triassic-Early Jurassic. The antimony deposits in central Jilin Province are of epithermal-mesothermal type genetically.

Key words： antimony deposit fluid inclusion stable isotope metallogenic age genesis of deposit Jilin Province

收稿日期: 2022-08-02

PACS:

P618.6

基金资助:中国地质调查局项目"吉林大车背沟等8幅1:5万矿产地质调查"(DD202008010).

通讯作者: 任龙(1988-),男,硕士,主要从事矿床学、岩石学、矿物学研究,通信地址黑龙江省牡丹江市东安区卧龙街45号,E-mail//renlong@mail.cgs.gov.cn E-mail: renlong@mail.cgs.gov.cn

作者简介: 许国雨(1992-),男,硕士,主要从事固体矿产勘查及相关成矿理论研究,通信地址黑龙江省牡丹江市东安区卧龙街45号,E-mail//xuguoyu@mail.cgs.gov.cn

引用本文:

许国雨, 任龙, 王存柱, 郑大贺, 李国郡, 陈宇, 毛永新, 崔雪文, 朱荣利. 吉林中部锑矿床成矿流体特征及其意义——以大秃顶子、植林、幸福屯锑矿为例[J]. 地质与资源, 2023, 32(5): 528-539.
XU Guo-yu, REN Long, WANG Cun-zhu, ZHENG Da-he, LI Guo-jun, CHEN Yu, MAO Yong-xin, CUI Xue-wen, ZHU Rong-li. ORE-FORMING FLUID CHARACTERISTICS AND IMPLICATION OF ANTIMONY DEPOSITS IN CENTRAL JILIN PROVINCE: A Case Study of Datudingzi, Zhilin and Xingfutun Antimony Deposits. GEOLOGY AND RESOURCES, 2023, 32(5): 528-539.

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