北淮阳构造带老湾金矿区构造与成矿作用的关系

17120033GEOSCIENCEVol117No.1Mar.2003,,,(,100083):,(-)3,,/;,2(/)(/):;;;;:P542;P618151:A:1000-8527(2003)01-0008-06:2002-11-13:(HY979833):,,,1962,,,20,,,,1,,(),,,[1],()[2],,,,,,[3][4],,,(),,()[4,5],,..().1994.1Fig11SketchmapofgeologicalstructureofLaowangolddeposit,HenanProvince11;21;31;41;51();61;71();81;1;211;221;231,,3,,3,:400490,400MPa,76136MPa,21535510-13s-1;:350,0130MPa,109175MPa,41971410-15s-1;:250,0125MPa,76136MPa,115710-26s-11216km(),2,,23km018113km,,24(1),,,,,3,,()()()(),3(1):RF2,,,;(2):,,(),;(3):,,94:,,,,,,()(),,,,,,,,;26m,,,4(1):,();(2):,;(3):,,,;(4):,,3,2:,,;,,3:(1);(2);(3),90%3:22222223,304194C,240C200C,,,[6],40Ar/39Ar10411108Ma,40Ar/39Ar9115Ma,4[7]2[810]2Fig12Removementandchangesofthemainelementsbetweenmylonitesandthecountryrocks411,SiO2,,,(SiFeMgMn),(NaKAl)[7](),(2)(3)23,,,AlFe2+MgCaNaSiFeK,0120033Fig13Removementandchangesofmainelementsbetweenorebodiesandcountryrocks(a);(b)4Fig14Removementandchangesoftraceelementsbetweenorebodiesandcountryrocks(a);(b),,,Fe2+MgTiPSiFe3+CaNaK,()(),,,412,(4),Rb,BaThNbCeSrZrTbCrNi,11518,Zr88,(REE),Hopf[11],,//,;/,114:5()Fig15REEpatternsofthecountryrocks,alterationrocks(ormylonites)andorebodies(a)();(b)()()(5)(),w(REE)21919610-619710910-62013510-6,w(LREE)/w(HREE)Eu316931794167016301590198;(),w(REE)781910-68911710-61612110-6,w(LREE)/w(HREE)Eu118311311019201621115,(),w(REE)w(LREE)/w(HREE)Eu(),;,(),5,(),,,(),/,,/,,,//;,413[1215],,,,(),/5Bonnemcison[16],,,,,()()[17],[14],,,,()212003,(/)(/),/,/,,,,!:[1],.[J].,1999,13(2):143149.[2],,,.[M].:,1994.[3],.[M].:,1988.[4],,.[J].,1996,6(1):1927.[5],,,.[J].,2000,14(4):401407.[6],,.[J].,2000,6(4):546553.[7],,,.[J].,2001,7(4):369378.[8].[J].,1996,3(4):230236.[9],,,.[J].,2001,15(2):151156.[10],,,.[J].,1999,6(1):115128.[11]HopfS.Behaviourofrareearthelementsingeothermalsys2temsofNewZealand[J].JournalofGeochemicalExplo2ration,1997,47:333357.[12],,,.[J].,1995,14(1):5772.[13],,,.[M].:,1996.[14],,.[J].,2001,36(1):3642.[15],,,.[J].,2001,75(4):507517.[16]BonnemcisonM,MarcouxE.Auriferousmineralizationinsomeshearzones:athreestage2modelofmetallogenesis[J].MineraliumDeposita,1990,25:96104.[17].[M].:,1988.THERELATIONSHIPBETWEENSTRUCTURESANDMINERALIZATIONOFLAOWANGOLDMINNIGAREAINNORTHERNHUAIYANGTECTONICBELTLIUWen2can,DUJian2guo,ZHANGDa,MAOXiao2chang(ChinaUniversityofGeosciences,Beijing100083,China)Abstract:Basedonthestudyofremovementofmainandtraceelements,fluidchangesinthecourseofstruc2turaldeformation,andtherelationshipbetweenthestructuresandmineralization,thepaperfocusesonLaowangolddepositthatisonetypeofstructuralalteration2rockgolddepositscontrolledbyductilesheerzone,andrelatedtomagmatism.Intheprocessoftheductilenapping,right2lateralslipandbrittledeforma2tioninGui2shan2Meishanfaultbelt,thegoldelementhadadifferentremovementwiththechangesofdiffer2encestressandfluid.Atthestageofductiledeformation,metamorphichydrothermalismwithrelativelylowratioofwatertorock,madegoldelementprimarilyconcentrate,whileatthestageofbrittledeformation,magmaticactivityandintensewater2rockinteractionmadegoldelementconcentrateandthegolddepositwasformed.Sothepaperputsforwardthatthistypeofstructuralalteration2rockgolddepositsinLaowangoldminingareaistheproductofore2formingprocessofconcentrationofgoldelementintwostages,i.e.bothductiledeformation(withlowratioofwatertorock)andbrittledeformation(alongwithmagmaticactivity,highratioofwatertorock).Keywords:ductileshearzone;substancechange;mineralizationoftwostages;Laowangolddeposit;northernHuaiyangtectonicbelt314: