山西耿庄金矿床流体包裹体特征及矿床成因  

Characteristics of Fluid Inclusion and Metallogenesis of Gengzhuang Gold Deposit,Shanxi Province

作　　者：姚玉增[1] 黄菲[1,2] 彭艳东[3] 刘宁[1] 王国光[2] 吕安才 

机构地区：[1]东北大学地质系,沈阳110004 [2]内生金属矿床成矿机制研究国家重点实验室(南京大学),南京210008 [3]东北大学秦皇岛分校,河北秦皇岛066004 [4]丹东市土地收购储备交易中心,辽宁丹东118000

出　　处：《吉林大学学报（地球科学版）》2013年第1期93-101,133,共10页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40872045;41172047);国家自然科学基金重大研究计划重点支持项目(90914002);中央高校基本科研业务费专项基金项目(90401010;110401005);内生金属矿床成矿机制研究国家重点实验室(南京大学)开放基金项目(12-06-03)

摘　　要：耿庄金矿床产于燕山期隐爆角砾岩体内,是晋东北具有代表意义的金多金属矿床之一。对矿床流体包裹体系统研究表明,不同成矿阶段石英中流体包裹体主要有5种类型:富气相包裹体、富液相包裹体、含CO2三相包裹体、含子矿物三相包裹体及少量纯液相包裹体,流体属H2O-CO2-NaCl体系类型。成矿前阶段包裹体类型多样,且以相似的均一温度共存,显示流体具明显沸腾及不混溶特性;成矿温度集中于170～180℃。结合同位素和金矿物特征,认为耿庄金矿床应为与燕山期次火山热液有关的中低温热液型金矿床。The Gengzhuang gold deposit, one of the typical gold polymetallic deposits in northeastern Shanxi Province, occurs in Yanshanian crypto-explosive breccia body. The studies of fluid inclusions indicate that there are five types of inclusions in the quartz of different metellogenic stages, i.e. gas-rich aqueous, HeO-rich aqueous, three-phase CO2-bearing, three-phase daughter-mineral bearing and single-phase aqueous fluid inclusions, and the mineralized fluids are of H20 - COe - NaC1 type. The various types of inclusions formed in ex-metallogenic stage have similar homogeneous temperatures, which indicates that the fluid experienced boiling or aqueous fluid immiscibility. The major metallogenic temperaute is about 170 - 180℃. Combined with isotopic composition and characteristics of gold minerals, we can conclude that the Gengzhuang gold deposit belongs to medium- low hydrothermal gold deposit related to the Yanshanian sub-volcanic activities.

关 键 词：耿庄金矿 流体包裹体 地球化学 矿床成因 

分 类 号：P618.51[天文地球—矿床学]