红河断裂带大型右旋走滑运动定量研究的若干问题

1920046ADVANCEINEARTHSCIENCESVol.19Suppl.Jun.20041001-81662004-0056-041000293032kmK-ArFTSEM87Ma5MaP54A013120804809056155Ma1361.12004-04-09.40272087.1943.E-mailxianghfayahoo.com.cn3050km32159mN2-Q11.2500m1000m1000m2000m1800m1100m1000m450m75.6km1.37.4kmIII353032km18kmSEMFT3032km5Ma18km3Ma1.4N1N2N157Ma8EN1N2Q9FT10.6Ma7.36Ma6.59Ma5.61Ma8752N2sN1jN2sFT5.3Ma105.3MaLeloup123640Ar/39Ar2217Ma155Ma4.7MaSEM410.65.61Ma7.5Ma7Ma78Ma5.34.7Ma3125.3Ma4.71Ma75Ma87Ma5Ma3I7.4km18km353032km1.52.0Ma3MaSEM56Ma15Ma45Ma5.3Ma3.6Ma11126mm/a45mm/a78MaN1Q1Q1Q38519References1LeloupPHetal.StructuralPetrologicalandthermalevolutionofaTertiaryductilestriklslipshearzoneDiancangmountainYun-nanJ.JournalofGeophysicalResearch199398846715-6743.2ChenWenjiHarrisonTMLoveraDM.Thermochro-nologyoftheAilaoshan-RedrivershearzoneAcasestudyofmultiplediffusiondomainmodelJ.SeismologyandGeology1992142121-128inChinese.3ChenWenjiLiQiWangYipeng.MiocenedlachronicupliftalongtheAilaoMountains-Redriverleft-lateralstrike-slipshearzoneJ.GeologicalReview1996425385-390inChinese.4ZhuChengnanDuanJialeKongXianghong.ThedevelopmentoftheoffsetdrainagesystemandseismicactivitiesontheRedRiverfaultzoneJ.JournalofSeis-molgicalResearch198253315-323inChi-nese.5TapponnierPetal.TheAilaoshanRedrivermetamorphicbeltTertiaryleft-lateralshearbetweenIndo-ChinaandsouthChinaJ.Nature199034343-437.6HarisionTMetal.AnearlyMiocenetransitionindeformationregionwiththeRedriverfaultzoneYunnananditssignificanceforIndo-AsiantectonicsJ.JournalofGeophysicalResearchView1992971357559-7682.7GuoShunminXiangHongfaJiFengjuetal.AstudyontherelationbetweenQuaternaryrightlateralslipandtipextensionalongtheHonghefaultJ.Seismolo-gyandGeology1996184301-309inChi-nese.8WanJinglinLiQiChenWenji.Fis-siontrackevidenceofdlachonicupliftalongtheShan-redriverLeft-lateralstrike-slipshearzoneJ.SeismologyandGeology199719187-90inChinese.9HeKezhaoHeHaoshengCaiHongbiao.FormationandevolutionofthewesternYunnanorogenicbeltJ.GeologicalReview199642297-106inChinese.10ZhangJiashengHanZhujun.ProgressivedeformationagedataandregionaltectonicrelationshipoftheYu-longHabamountainrangenorthwestYunnanA.InMaZongjinWangYipengetaleds.StayontheRecentDeformationandDynamicsoftheLithosphereofQinghai-XizangPlateauC.BeijingSeismologicalPress2001.136-147inChinese.11MaZongjinZhangJiashengWangYipeng.ThethirddeformationalmovementepisodesandNeo-tectonicdomainsintheQinghai-TibetplateauJ.ActaGeologicaSinica1998723211-227inChinese.12ZhongDalaiDingLin.RisingProcessoftheQinghai-TibetplateauanditsmechanismJ.ScienceinChinaDD1996394369-379inChinese.PROCESSINGABOUTQUANTITATIVESTUDYOFLARGESCALESTRIKE-SLIPMOVEMENTONREDRIVERFAULTZONEXIANGHong-faHANZhu-junGUOShun-minCHENGLi-chunZHANGWan-xiaInstituteofGeologyChinaSeismologicalBureauBeijing100029ChinaAbstractBasedontheinterpretationofremote-sensingimagesgeologicalsurveyrelatedchronologicalstudyandthepreviousdataanalysisthegeologicalevidencesonthelarge-scaledextraldisplacementsalongtheRedRiv-erfaultzoneasawholeareilluminated.ThebasicfeaturesaboutgeometrydynamicsandchronologyoftheRedRiverfaultzoneareinvolved.Wealsodiscusstheco-relationbetweenthelatelarge-scaledextralstrike-slipmove-mentandthelift-upofTibetanplateau.Ourworkshowsthatbecauseofthelarge-scaledextralslipalongtheRedRiverfaultzonethenorthwestYunnanrift-basinregiontheextensivetectonicsareformedontheendsinceMio-cene.TheextensivebasinshavespreadsoutheastwardlyfromtheMiocenetotheQuaternary.Typicalstrike-slipde-formationappearsatthecentersegmentoffaultzone.Thegraniticbodyinthelate-Yanshanperiodthecoal-basinsandthedrainageofLisheRiveraredextrallyoffsetin-phase.ThedextraldisplacementsincethePliocenecanbe3032km.Thedextraloffsetofpiedmontdrainageandthedextralrift-intodeformationinthefaultvalleyarethemajorfeaturesinthesouthernsegment.Thefault-depressedbasinsrelatedwiththerapidlift-upofrangesspreadnorthwestwardlyfromtheMiocenetotheQuaternary.Accordingtothegeologicalstudyandthechronologicalanaly-sisofKArFTandSEMintheregionitcanbeprimarilyconcludedthatthemajordextralstrike-slipmovementalongtheRed-Riverfaultzonebeganin87Maandarrivedatthepeakabout5Ma.KeywordsQuantitativestudyThemajordextralstrikeslipmovementTheRed-Riverfaultzone.95