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时间:2020-03-25
《河南嵩县庙岭金矿地质特征与钾长石4oA r39Ar定年.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第31卷第4期地质通报V01.31.NO.42012年4月GEOLOGICALBULLETIN0FCHINAApr.,2012河南嵩县庙岭金矿地质特征与钾长石4oAr尸9Ar定年翟雷,叶会寿,周珂。,孟芳,高亚龙ZHAILei,YEHui—shou,ZHOUKe。,MENGFang4,GAOYa—long51.河南省地质矿产勘查开发局第一地质调查队,河南洛阳471023:2.中国地质科学院矿产资源研究所/国土资源部成矿作用与资源评价重点实验室,北京100037:3.中国地质学会,北京100037;4.中国地质大学(北京)地球科学与资源学院,北京100083
2、;5.天津华北地质勘查局,天津3001701.No.1GeologicalSurveyingParty,HenanBureauofGeologyandMineralExplorationandDevelopment,Luoyang471023,口e砌Chino;2.MLRKeyLaboratoryofMetallogenyandResourcesAssessment~InstituteofMineralResources,ChineseAcademyofGeologicalSciences,Beijing100037,China,"3.Geological
3、SocietyofChina,Beijing100037,China;4.SchoolofEarthScienceandResources,ChinaUniversityofGeosciences,Beijing100083,China,"5.TianjinNorthChinaGeologicalExplorationBureau,Tian]in300170,China摘要:河南嵩县庙岭金矿位于华北陆块南缘熊耳山一外方山地区。矿床赋存于中元古界熊耳群火山岩中近南北向断裂带内.矿体呈似层状、透镜状产出,矿石具浸染状、细网脉状构造和微细粒它形粒状晶粒结构、交代
4、结构,围岩热液蚀变有硅化、钾长石化、绢云母化、黄铁矿化等,矿化具有多阶段的特点,属破碎带蚀变岩型金矿。成矿热液蚀变矿物钾长石Ar—Ar法测年的结果:坪年龄为121.6Ma+1.2Ma,等时线年龄为117.OMa_+1.6Ma,表明矿床形成于早白垩世,与熊耳山地区祁雨沟、瑶沟等金矿床形成于同一时期,属与早白垩世构造一岩浆一流体活动有关的产物。关键词:破碎带蚀变岩型金矿;钾长石uAr一定年;庙岭金矿;河南中图分类号:P618.51;P534.53文献标志码:A文章编号:1671-2552(2012)04—0569—08ZhaiL,YeHS,ZhouK,Meng
5、F,GaoYL.GeologicalcharacteristicsandK-feldsparAr尸rdatingoftheMiaolinggolddepositinSongxianCounty,HenanProvince.GeologicalBulletinofChina,2012,31(4):569-576Abstract:TheMiaolinggolddepositinSongxianCountyofHenanProvinceislocatedintheXiongershan—Wai~ngshanareaonthesouthmarginofNorthC
6、hinacraton.TheoredepositishostedintheMesoproterozoicvolcanicrocksofXiongerGroup,alongaNS—trendingfracturezone.Orebodiesoccurinlayeredandlenticularforms.andoreshavedisseminatedandstockworkstructurewithanhedralfine—gr~nedtextureandreplacementtexture.Hydrothermalalterationsofthewallr
7、ockincludesilicificafion,K—feldspathiza-tion,serlcl‘tl‘zatl’on,pyrifizafionetc.Mineralizationsshowmulti—stagecharacteristicsandthegolddepositisofthefracturezonealteredrocktype.lAr一ArplateauageandisochronageofK—feldspararerespectively121.6Ma+1.2Maand117.0Ma+_1.6Ma.indicatingthatthe
8、oredepositwasformedinEarlyCretace
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