ThePengshanSn-Pb-ZnpolymetallicorefieldislocatedintheJiujiang-Ruichangregion,whichisasegmentofthemiddle-lowerYangtzeRivermetallogenicbelt.ThePengshanlateYanshanianburiedplutonwithgraniticcompositionisacalc-alkalinepluton,intrusionofwhichisresponsiblefortheformationoftheSn-Pb-Znpolymetallicdepositthroughprovidingthermodynamicconditionandore-formingmaterial.Thelong-activebasementriftsinitiallyformedintheJinningperiodandthedomalstructurewithinducedsecondaryorderfaultsformedbyemplacementofthepluton,suchasring-detachmentfault,top-detachmentfaultandjointfissure,actasthepassage-wayformagmaandore-formingfluidandimpoundingstructurefororedeposit.ThemagmatoformtheplutonwithDI＞90isintensivelydifferentiated.Thevariationoftheore-formingfluidincompositionwithfallingintemperaturecausedbyactionofmagmatichydrothermalconvectionsystemcombinedwithgroundwaterconvectionsystemattributestomineralizationofvarioustypesintheorefield.Themineralizationprocesscanbepidedintosixstages,i.e.,greisenization,skarnizationofearlystage,fluorite-stanniferoussilicationstage,skarnizationofadvancedstage,quartzandcassiterite-sulfurationstageandcarbonationstage.Themineralassemblagesformedindifferentmineralizationstagesaredifferentowingtotemperaturechangingandmaybeoverlappedinspace.Malayaiteisrecognizedfromthemineralassemblageformedinthefluorite-stanniferoussilicationstage.TheoresinthePengshanSn-Pb-ZnpolymetallicdepositarespatiallyzonedwithvariationfromAs-SnmineralassemblageofhightemperatureintheinnerzonethroughSn-PbandPb-Zn-Agmineralassemblageofmiddletemperatureinthemiddlezonetofluoritemineralassemblageoflowtemperatureintheouterzone.TheexchangingofSn,MgandFebetweenbiotiteandhydrothermalfluidresultedfromvariationofphysicochemicalconditionduringevolutionprocessesofthehydrothermalflu
