辽宁高家堡子银矿床矿石晶洞构造及其成因机制  

Miarolitic structure of ores and its genesis in Gaojiapuzi silver deposit of Liaoning

作　　者：汪建宇[1] 王文旭[2] 王承洋[2] 秦丹鹤[2] 王可勇[2] 

机构地区：[1]吉林海沟黄金矿业有限责任公司,吉林安图133611 [2]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2012年第2期231-237,共7页World Geology

基　　金：内蒙古自治区地质勘查基金项目(09-1-KC181)

摘　　要：高家堡子银矿床是在辽东青城子铅锌矿田内发现的一大型独立银矿床,赋存于辽河群大石桥组第三段以大理岩为主的地层之中,矿体形态及产状受层间破碎带构造控制。矿区矿石分为硅化石英脉型及碎裂大理岩型两类,其中前者为矿区主要的富银矿石。该类矿石晶洞构造极其发育,根据地质及流体包裹体研究成果,认为矿石中的晶洞构造是岩浆来源富CO2流体溶蚀赋矿的大理岩围岩形成的溶洞,被晚期以大气降水为主流体充填形成晶簇状石英。Gaojiapuzi silver deposit is a large silver deposit discovered in Qingchengzi lead-zinc ore field in eastern Liaoning Province. The deposit occurred in marble-dominated strata of the third member of Dashiqiao Formation in Liaohe Group and the shape as well as occurrences of ore bodies were controlled by bedding brecciation zones. The types of ores in the mining district are divided into silicified quartz vein type and brecciated marble type, with the former as the main kind. Miarolitic structure developed well in the ore bodies. Based on the study of geological characteristics and fluid inclusions, the conclusion was made that the miarolitic structure of ores was the result of crystalization of drusy quartz from later meteoric water-dominated fluids in solution cavities which formed through the corrosion of marble by magma-derived and CO2-rich fluids.

关 键 词：晶洞构造 成因机制 高家堡子银矿床 辽宁省 

分 类 号：P618.52[天文地球—矿床学]