辽西二道沟金矿成矿物质来源:来自S-Pb同位素的证据  

The Ore-forming Material of the Erdaogou Gold Deposit in West Liaoning Province: Evidence from S-Pb Isotopes

作　　者：聂飞[1] 刘书生[1] 董国臣[2] 陈永长 王鹏[2] NIE Fei;LIU Shusheng;DONG Guochen;CHEN Yongchang;WANG Peng(Chengdu Center,China Geological Survey,Chengdu,Sichuan 610081,China;School of Earth Sciences and Resources,China University og Geosciences,Beijing 100083,China;Erdaogou Gold Mining Co.Lit,Chaoyann,Liaoninn 122100,China)

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]辽宁二道沟黄金矿业有限责任公司,辽宁朝阳122100

出　　处：《现代地质》2018年第6期1283-1291,共9页Geoscience

基　　金：中国地质调查局研究项目(121201010000150013;1212011120608;1212011220907)

摘　　要：辽西二道沟金矿位于华北克拉通北缘中段,矿化类型为石英脉型,矿脉产状受断裂严格控制。对该矿床的典型矿脉进行了详细的硫、铅同位素研究,探讨了该矿床的成矿物质来源。分析表明:二道沟金矿成矿热液的总硫同位素组成接近地幔硫的值(δ34S≈0‰),反映了成矿热液的硫主要来自深部岩浆;铅同位素206Pb/204Pb、207Pb/204Pb和208Pb/204Pb分别变化在17. 047～17. 292、15. 319～15. 555和36. 991～37. 855之间,得出矿石铅主要来源为地幔,且有下地壳铅的混入;二道沟金矿矿石的硫、铅同位素特征与西对面沟岩体的硫、铅同位素组成特征基本一致,说明成矿物质的来源与西对面沟岩体(或这次岩浆作用)有密切联系。这些证据都证明了二道沟金矿成矿物质来源于深源岩浆。The Erdaogou gold deposit in West Liaoning Province is located in the middle segment of north mar gin of North China Craton.The mineralization type is quartz vein type,and the occurrence of ore vein is controlled by fault.In this paper we study S and Pb isotopes in detail on the typical quartz vein to discuss the ore-forming material source.Theδ34S values of the total S isotope for the ore-forming hydrothermal fluids are quite similar to those of the mantle,suggesting that the sulfur of the ore-forming hydrothermal solution was derived from hypomagma.The 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb values of ores range from 17.047to 17.292,15.319 to 15.555 and 36.991 to 37.855,respectively,suggesting that the ore lead was from mantle and lower crust.The S and Pb isotope values are similar to those of the rocks of Xiduimiangou,so we deduce that the sources of ore-forming material are strongly associated with the Xiduimiangou rock(or this magmatism).All the evidences support that metallogenic materials were derived from hypomagma.

关 键 词：硫、铅同位素 成矿物质 二道沟金矿 辽西 

分 类 号：P618.51[天文地球—矿床学]