沂沭断裂带中段地质特征与金矿成矿作用

1,2,1,1(1.,250013;2.,261021):,,,,,,,,:;;;:P612:A:1007-6956(2004)04-0255-06:2004-04-02:(200110200051):(1962-),,,,1Fig.1Geologicalsketchmapofthestudiedarea1.;2.;3.;4.;5.;6.;7.;8.;9.;10.;11.;12.;13.Y1.;Y2.;Y3.;Y4.1,,,,,1025,330km,2060km,-,,,(l);,2,,,,274200412GEOLOGICALSURVEYANDRESEARCHVol.27No.4Dec.2004©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved..,2003.,,,,I,11000m,50360m,(2)4,I1I2I3I4,I1I22300m,560m,2,121301400m,0.804.62m,,,2Fig.2ThegeologicalmapofthegoldfieldinthemiddlepartofYiShufaultedzone1.;2.;3.;4.;5.;6.;7.;8.;9.;10.3,,,,10.710-9(n=139),,,,[1],,,,,,,,R.W.Boyle[2]4,(70%80%),,4.1,,25312706Ma[3],,,2490Ma[3],,65227©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,4.2,,,,,,,,[4],,,,[5]4.3:(1),,,,;(2),;(3),,:,;,,;,,[6];,[78],,,,[9],,,,,,,,,,55.1,,[3]:,,TTG,,,,,,,,,,,,17524:.120,,1996..,,1997.12.©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1Table1Listshowingthefeatureofthemainductiledeformationbelt10km,0.31.1km28030545553040173225km,1.22.5km1101254860285121819km,2.55.2km11213556623545162220.4km,2.24.3km125130627238451822,,,,,40Ar/39Ar941Ma[1],,5.2,(1),150km,1025,,1501000m2802953556,,,,,,,,,;,,,,(2)20,4550,,6085,,,,,,(3),,(4),,5.3,,[1]:,5.3.1,,,85227.1:5,1990.©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,(),,,,,,,,,,,,[10]:,(),,5.3.2,NNW,,,,,[4],,,,,,,,(,1987)[5],,,,,,,5.3.3,5.3.4,,,:,;;;;,,,,,,,,,,,,,,,,,,,()9524:,120,,1992.©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,6(1),,(2),,,(3),,:[1].[M].:,1995,12.[2]R.W..[M].,,.:,1984.[3],,,.[M].:,2000.[4].[M].,1999,12.[5].[M].:,2002.[6],.[M].:,1998.[7],.[J],,2002,25(3499100).[8],,.[M].:,1997.[9],.[J].,2002,25(3499100).[10],.[M].,1989.GeologicalCharacteristicsandGoldFormationintheMidpartoftheYiShuFaultLIHongkui1,YANGYongbo2,LIYingping1,TIANJingxiang1(1.ShandongGeologicalSurveyInstitute,Jinan250013;2.No.4ExplorationInstituteofGeologyandMineralResources,Weifang261021)Abstract:YiShufaultisalithospherefracturebeltwithalonghistory,whichformedariftfracturesystembytheeffectoftheKulaplateandthePacificplatemovementduringMesozoic.Accordingtothestudyonthemiddlepartofthisfault,itissuggestedthatthispart(fromYiShutoTangtou)isamiddledeepductileshearzonewithNEdirection,andfirstlyformedduringJinningperiod(Newproterozoic).Andlateritwasoverprintedandreformedbythebrittlestructureandformedacomplexductilebrittlestructuralbeltatlast.Itcontrolsthegoldoreformation,andisthehoststructureofthegoldore.4orebodieshavebeenfoundinthebelt.Theirhostrocksarealterationgreenschist,mylonitizationcataclasticrockandgraniticcataclasticrock.Keywords:YiShurift;goldore;YishuiTangtoufault;oreformation06227©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.