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时间:2020-04-12
《《黑龙江省高松山浅成低温热液金矿床围岩蚀变元素迁移特征、定量计算与形成机制》.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44卷第1期膨at"feVo1.44,No.1,87—1012015年1月GEoCHIMICAJan.,2015黑龙江省高松山浅成低温热液金矿床围岩蚀变元素迁移特征、定量计算与形成机制郑硌,顾雪祥,章永梅1,刘瑞萍,耿会青,王艳忠2,赵红海2,李亚军2f1.中国地质大学地质过程与矿产资源国家重点实验室,北京100083;2.武警黄金第一支队,黑龙江牡丹江157021)摘要:高松山浅成低温热液金矿床赋存于下白垩统安山岩等中基性火山岩中。矿体受围岩中断裂破碎带的控制,呈脉状产出。矿区围岩蚀变主要发育硅化、黄铁矿化、冰长石化、伊利石化、绢云母化、碳酸盐化和绿泥石化等。根据蚀变矿物组
2、合和蚀变岩地球化学特征,可将围岩蚀变由近矿至远矿分为3个带:强硅化一冰长石化带、硅化.伊利石化一冰长石化带、伊利石化一青磐岩化带。对各蚀变带进行了全岩元素地球化学分析,利用元素迁移定量计算和图解等方法详细估算和拟定了蚀变过程中元素的迁移规律及其与蚀变矿物学之间的联系。结果表明,安山岩蚀变过程与金矿化密切相关,特别是硅化、冰长石化和黄铁矿化蚀变阶段。根据围岩蚀变形成过程与成矿之间的联系,探讨了高松山金矿床围岩蚀变的形成机制。关键词:围岩蚀变;元素迁移;定量计算;浅成低温热液金矿;黑龙江省中图分类号:P614;P595文献标识码:A文章编号:0379—1726(2015)01-00
3、87—15Elementmobilization,mass—changequantificationandformationmechanismofwallrockalterationintheGaosongshanepithermalgolddeposit,HeilongjiangProvince,ChinaZHENGLuo1GUXue—xiang1ZHANGYong—mei,LIURui.ping1GENGHui—qing,,,,WANGYan.zhong.ZHAOHong—haiandLIYa~un1.StateKeyLaboratoryofGeologicalProces
4、sesandMineralResources,ChinaUniversityofGeosciences,Beijing100083,China2.TheFirstGoldGeologicalPartyofCAPF,Mudanjiang157021,ChinaAbstract:TheGaosongshanepithermalgolddepositiShostedinaLowerCretaceousandesite.Orebodiesoccurasveinscontrolledbyfracturedzonesinwallrocks.Hydrothermalalterationare
5、welldevelopedintheGaosongshangolddeposit,includingsilicification,pyritization,adularization,illitization,sericitization,carbonatization,chloritization,etc.Accordingtoalterationmineralassemblageandwholerockgeochemistry,3alterationzoneshavebeenidentified(proximaltodista1):strongsilicification—
6、adularizationzone,silicification.illitization.adulari—zationzoneandadularization-propylitizationzone.Thispaperfocusesonestimatingthemigrationpatternofelementsbyquantitativecalculationandgraphicalmethods,anddiscussingthelinkbetweenalterationmineralogyandelementsmigration.Resultsshowthataltera
7、tionprocessofandesiteiscloselyrelatedtoAumineralization,especiallysilicification,adulariazationandpyritization.Basedontherelationshipbetweenalterationprocessandmineralization,wediscussedthehydrothermalalterationformingmechanismoftheGaosongshangoldd
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