东昆仑造山带东段色日金矿床地质特征及成因  

Geological characteristics and genesis of the Seri Gold Deposit in the eastern part of the East Kunlun orogenic belt

作　　者：张健[1] 张正虎 李小亮 杨德 于小亮 李华 钱烨[1] Zhang Jian;Zhang Zhenghu;Li Xiaoliang;Yang De;Yu Xiaoliang;Li Hua;Qian Ye(College of Earth Sciences,Jilin University;The Third Geological Exploration Institute,Qinghai Nonferrous Metal Geological and Minerals Exploration Bureau;Qinghai Nonferrous Geological Mineral Resources Exploration Bureau;The First Geological Exploration Institute,Qinghai Nonferrous Metal Geological and Minerals Exploration Bureau;Qinghai Geological Survey)

机构地区：[1]吉林大学地球科学学院 [2]青海省有色地质矿产勘查局第三地质勘查院 [3]青海省有色地质矿产勘查局 [4]青海省有色地质勘查局第一地质勘查院 [5]青海省地质调查局

出　　处：《黄金》2025年第2期62-71,共10页Gold

基　　金：青海省省级地质勘查专项基金项目(2023085029ky004)。

摘　　要：色日金矿床位于东昆仑造山带的昆中花岗岩隆起带,隶属于沟里金多金属矿整装勘查区。色日金矿床主要赋矿围岩为印支期和华力西期中酸性侵入岩,成矿主要受北北东向断裂控制。围岩蚀变主要有硅化、绢云母化、绿泥石化、碳酸盐化、高岭土化等。根据野外穿插关系,将热液成矿期划分为3个阶段:石英-黄铁矿阶段、石英-多金属硫化物阶段与石英-碳酸盐阶段。流体包裹体显微测温结果显示:石英-黄铁矿阶段流体包裹体完全均一温度为308.50℃~355.10℃,盐度为5.41%~12.31%;石英-多金属硫化物阶段流体包裹体完全均一温度为276.90℃~312.70℃,盐度为7.58%~9.47%;石英-碳酸盐阶段流体包裹体完全均一温度为248.30℃~286.60℃,盐度为5.25%~8.81%。综合分析认为,色日金矿床成矿流体为中温、中盐度的NaCl-CO_(2)-H_(2)O体系。成矿阶段石英与方解石的C-H-O同位素分析结果显示,成矿流体以岩浆水为主,晚期有大气降水的加入。原位S同位素分析结果显示,成矿物质主要来源于岩浆岩。色日金矿床为受构造和深部岩浆活动控制的中温热液脉型金矿床。The Seri Gold Deposit is located in the Kunzhong granite uplift belt of the East Kunlun orogenic belt and belongs to the Gouli gold polymetallic integrated exploration area.The main host rocks of the Seri Gold Deposit are Indosinian and Variscan intermediate⁃acidic intrusive rocks,and the mineralization is primarily controlled by NNE⁃trending faults.Host rock alterations include silicification,sericitization,chloritization,carbonation,and kaolinization.Based on field crosscutting relationships,the hydrothermal mineralization period is divided into 3 stages:quartz-pyrite stage,quartz-polymetallic sulfide stage,and quartz-carbonate stage.Microthermometric analysis of fluid inclusions indicates that the full homogenization and salinities are as follows:308.50℃-355.10℃ and 5.41%-12.31%during the quartz-pyrite stage,276.90℃-312.70℃ and 7.58%-9.47%during the quartz-polymetallic sulfide stage,and 248.30℃-286.60℃ and 5.25%-8.81%during the quartz-carbonate stage.Comprehensive analyses suggest that the ore⁃forming fluid of the Seri Gold Deposit is a medium temperature,medium salinity NaCl-CO_(2)-H_(2)O system.C-H-O iso⁃topic analysis of quartz and calcite from the mineralization stages indicates that the fluid was predominantly magmatic water,with late⁃stage contributions from meteoric water.In⁃situ S isotopic analysis shows that the ore⁃forming materials primarily originated from magmatic rocks.The Seri Gold Deposit is classified as a medium temperature hydrothermal vein⁃type gold deposit controlled by tectonics and deep magmatic activity.

关 键 词：东昆仑造山带 沟里 色日金矿床 流体特征 C-H-O同位素 原位S同位素 中温热液脉型 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]