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1、黑牛凹矿金矿地质特征及成因探析摘要：黑牛凹金矿主要地层为寒武系上统核桃坪组（W3h）钙质板岩、粉砂质板岩，岩浆岩以主要以华力西期辉绿岩、辉长岩为主。矿区内已圈出3条矿（化）体，总体走向近南北向，以HNV2矿体为主要矿体。矿体产于核桃坪背斜轴部旁侧近南北向组及北北西向组构造断裂碎带中并严格受其控制，构造具多期活动特征，成矿物质来源于地下深部的隐伏酸性岩体、基性岩体和围岩。富含矿质及活性组份的深部气水热液沿构造通道运移，不断与地层中的活性矿物质发生交代、迁移富集，在封闭的有利构造空间冷凝沉淀，随着温度、压力的降低，高温元素Fe先与造岩矿物沉淀下来形成矽卡
2、岩型磁铁矿，其后中低温元素Pb、Zn继续沉淀形成矽卡岩型铅锌矿及构造蚀变岩型铅锌矿，铅锌沉淀后还有大量含Au低温硅质热液进一步运移沉淀或运移充填到周围较小的构造裂隙中形成蚀变构造角砾岩型或石英脉型金矿体。综上所述，黑牛凹矿段金矿应属中-低温热液交代型金铅锌多金属矿床。关键词：金铅锌矿床；钙质板岩；黑牛凹Abstract：theblackNiuAogoldminemainstrataisCambrianseriesonHeTaoPinggroup（w3h）calciumSLATE,thepowdersandqualitySLATE,magmaticro
3、ckstomainlyvariscanfaigreenrocks,failongrocktogivepriorityto.Inthecirclehasthreeore(change)body,overalltonearlyns-trendingtoHNV2orebodyasthemainorebody.FromHeTaoPinganticlineaxisdepartmentorebodylateraldispersionnearlyns-trendinggroupandnorthnorthwesttostructuralfauItswithbroke
4、ninthegroupandstrictlyunderthecontrol,thestructureofactivitieswithcharacteristics,metallogenicmaterialcomesfromdeepundergroundconcealedacidrockmass,andthesexualrockmassandsurroundingrock・Richinmineralandactivecomponentsinthedeepgashotliquidwateralongthetectonicmigrationchannels
5、,andconstantlyandformationofactivemineralaccount,migrationhappenedenrichment,inaclosedfavorablestrueturalspacecondensingprecipitation,withthetemperature,thepressure,reduce,hightemperatureelementsandFefirstmaderockmineraldepositsformeddownskarntypemagnetite,followedbylowtemperat
6、ureelementsofPb,Zncontinuetoprecipitateformskarntypelead-zincmineandtectonicalteredrocktypelead-zincmine,leadandzincprecipitationandmassivequantitiesofAulowtemperaturesiliconhydrothermalfurthermigrationprecipitationormigrationfillingintothesurroundingthesmallerstructuralfissure
7、formedinalteredtectonicbrecciatypeorquartzveintypegoldorebody.Tosumup,theblackNiuAoore-layeringoldoflowtemperatureshouldbe~thehotliquidgoldreplacementtypelead-zincpolymetallicdeposit.Keywords：goldpb~zndeposit；CalciumSLATE；BlackNiuAo中图分类号：0741+.2文献标识码：A文章编号：1、矿区地质概况黑牛凹金矿位于冈底斯-念青
8、唐古拉褶皱系，福贡-镇康褶皱带、保山-永德褶皱束北段。茅竹棚-核桃坪复背斜东翼。核桃坪复式破背斜核部，属保山
