摘要
DinggyeliesinthemiddlepartoftheHimalayanOrogen.AlotoflowangleextensiondetachmentfaultshavebeendevelopedinDinggyeareaandsomeofthemmakeupthemainbodyoftheSouthTibetDetachmentSystem.Onthewhole,theextensiondirectionofallthedetachmentfaultsisperpendiculartothestrikeoftheHimalayanOrogen.Eachdetachmentfaulthasitsdistinctcharacteristics.Mylonitewasextensivelydevelopedinthedetachmentfaultsandcanbedividedintoavarietyoftypessuchassiliceousmylonite,felsicmylonite,granitemylonite,protomylonite,crystallizationmyloniteandsoon.Onthebasisofourfieldsurveyworks,thesedetachmentfaultscanbeclassifiedaccordingtotheirlocationsintothreeunitslistedasfollows:(1)Inthenorthernpartofthestudyarea,thedetachmentfaultsoccuronlargescaleandinorbicularshape,andformthemiddlelayerofthemetamorphiccorecomplexes.(2)Inthesouthernpartofthestudyarea,thedetachmentfaultsoccurinlinearshapethatisparalleltotheHimalayanOrogenandhasastableattitude,andhaveundergonetwophasesofdevelopment.Inthefirstphase,theRouqiechunGrouprockswereformedandmakeupthehangingwall,whileinthesecondphasetheJiachunGrouprockswereformedandmakeupthehangingwall.(3)Inthesoutheastempartofthestudyarea,thedetachmentfaultsstrikenearlyalongsoutheastdirectioninastablewayandsomeofthesedetachmentfaultsweredistortedbythelate-formedfaultsandfolds.Furthermore,inthesouthwesternpartofthestudyarea,theductileshearzonesareparalleltothedetachmentfaults.
出版日期
2003年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
