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1、OreGeologyReviews56(2014)181–198ContentslistsavailableatScienceDirectOreGeologyReviewsjournalhomepage:www.elsevier.com/locate/oregeorevGeochemistryoftheHuangshandongNi–CudepositinnorthwesternChina:Implicationsfortheformationofmagmaticsulfidemineralizationinorogenicbeltsa,bb,⁎,Lie-MengChenba
2、a,caYu-FengDeng,Xie-YanSong,TaofaZhou,FrancoPirajno,FengYuan,baWeiXie,DayuZhangaSchoolofResourcesandEnvironmentalEngineering,HefeiUniversityofTechnology,Hefei230009,ChinabStateKeyLaboratoryofOreDepositGeochemistry,InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,ChinacCentref
3、orExplorationTargeting,UniversityofWesternAustralia,35,StirlingHighway,Crawley6009;AustraliaarticleinfoabstractArticlehistory:TheHuangshandongNi–CusulfidedepositislocatedatthesouthernmarginoftheCentralAsianOrogenicBeltReceived28October2012(CAOB)innorthXinjiang,NWChina.Thedepositcontains~135
4、Mtofsulfideoresgrading0.27wt.%Cu,Receivedinrevisedform18August20130.52wt.%Ni.ThedepositishostedbyanEarlyPermianmafic–ultramaficcomplexpredominantlycomprisingdi-Accepted19August2013orite,hornblendegabbro,olivinegabbro,gabbronorite,lherzolite,sulfide-bearinglherzoliteandilmenite-bearingAvailable
5、online23August2013hornblendegabbroatthebaseoftheintrusion.TheserocksexhibitenrichmentoflargeionlithophileelementsanddepletedhighfieldstrengthelementsrelativetoN-MORB,andhighTh/Ybratios,indicatingthattheprimaryKeywords:MagmaticNi–CusulfidedepositmagmaoftheHuangshandongintrusionwasderivedfromp
6、artialmeltingofametasomatizedmantlesource,Orogenicbeltsmodifiedbysubductedslab-derivedmelt/fluid.IntrusiverelationsandgeochemicalsignaturesconfirmthatMetasomatizedmantlefourpulsesofmagmawereinvolvedintheformationoftheHuangshandongintrusion.ThelowSe/SratiosofHuangshandongintrusion−6thesulfideor
7、es(63.1–166×10)andfieldobservationssuggestthatcontaminationbycrustalSandgraphiteXinjiangwasthekeytriggermechanismforsulfidesaturation.TheΣPGEcontentsintheHuangshandongrocksandsulfideoresrangefrom0.25to99.1ppb,lowerthanthoseofPGE-undepletedNi–Cusulfidedeposits.High
