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1、CharacteristicsandGenesisofEpithermalGoldDeposits浅成低温热液金矿特点及成因LowSulfidation第二部分：低硫化浅成低温矿床DavidCooke,JBruceGemmellandNoelWhiteVuggyquartz,CrustiformbandedlowYanacochadistrict,sulfidationvein,McLaughlinPerugolddeposit,CaliforniaLSDepositCharacteristicsLS
2、矿床特征Ore矿石Au-AgMetals金属As,Sb,Zn,Pb,Hg,SeAlterationadularia-carbonate,illite(muscovite),smectite,chlorite,epidote蚀变冰长石-碳酸盐，伊利石（白云母），蒙脱石，绿泥石，绿帘石TexturesOpenspacefill（bandedcrustiformveins,bladedcalcite,breccias)结构开放空间充填（壳状条纹脉，叶片状方解石，角砾岩FormVeins,breccias,d
3、isseminations形态脉状，角砾状，浸染状Serujandeposit,MtMuro,IndonesiaLowSulfidation(LS)Deposits低硫化矿床氯化物水，沸腾泉，蒸汽加热的酸性硫酸盐硅酸盐泉华水，泥池，喷气孔chloridewaters•Magmaticheatacidsulfatesteam-heatedboilingsprings,silicasintersourcewatersmudpools,fumaroles(plus富CO2的蒸汽加热的水volatiles?)
4、CO2-richsteam-heatedwaters岩浆是热源（也coldgroundwater是挥发份源？）recharge冷地下水补充•Meteoricconvection大气水对流Neutralchloride中性氯化物•PeripheralLSwaters低硫化水bicarbonatewaters400ºC外围的重碳酸盐水•Steam-heatedacid2kmsulfatewaters2km蒸汽加热的酸性硫Magma岩浆酸盐水LowSulfidationDeposits低硫化矿床Pajing
5、o-Jandam685HWLowSulfidationDeposits低硫化矿床网脉状矿体Stockworkore,Guanajuato,Mexico角砾岩中赋存的矿体脉状矿体，有条纹Breccia-hostedore,Kelian,IndonesiaBandedveinore,Hishikari,JapanLSoremineralogyLS矿物矿石Silversulfosalts,MtMuro,IndonesiaFreegold,Porgera,PNG(Corbett&Leach,1998)银的硫盐
6、矿物自然金，Metallicmineralsinclude:electrum,acanthite,Ag-sulfosalts,sphalerite,galena,tetrahedrite-tennantite,chalcopyrite,arsenopyrite,pyrrhotite,selenides,tellurides金属矿物包括：银金矿，螺状银硫矿，银的硫盐矿物，闪锌矿，方铅矿，黝铜矿-砷黝铜矿，黄铜矿，毒砂，磁黄铁矿，硒化物，碲化物。LSganguemineralogyLS脉石矿物•SiOpo
7、lymorphs(quartz,chalcedony,2amethyst)SiO的同质异形体(石英，玉髓，紫水晶)2•Adularia冰长石•illite(sericite)伊利石（绢云母）•Chlorite绿泥石•Carbonates(calcite,rhodochrosite)碳酸盐（方解石，菱锰矿）•bariteandfluorite重晶石&萤石Bimurra,AustraliaGoldenCross,NewZealandGuanajuato,Mexicoquartz,chalcedony,ad
8、ulariaquartz,chalcedony,amethyst石英，玉髓，冰长石石英，玉髓，紫水晶McLaughlin,Victoria,PhilippinesCaliforniaquartz,chalcedonyQuartz石英，玉髓石英Kelian,IndonesiaAcupan,PhilippinesADUKAOPYRAdularia-pyritecementedbrecciaAdulariarhombsintergrownwithwithlat
