简介：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.

简介：Thebasin-and-rangeareaineasternNorthChinaisknownforfrequentoccurrenceofearthquakes,theirgreatmagnitudesandheavylossestherebyincurred.Seismicstudiesinthepastusuallyemphasizedtheintersections,inflexionsandbranchesofthefaults.However,theintensitiesofmanygreatearthquakesinthisareadonotshowlineardistribution,andtheepicentersarehorizontallydispersedatcertaindepthsinsteadofalongthestrikeoffaults.Basedonthesub-mantleplumestudiesmadebyauthorsinthepastdecade,itisthoughtthatthereexistsanupliftedsub-mantleplumeunderthefaultdepressionareainNorthChina.Theupliftingandintrusionofmantlematerialscausedtheuppercrusttobefaulted,whilelow-velocityandhigh-velocitylayersarealternativelydistributedinthemiddlecrustundertheinfluenceofthemantleandthelowercrust.Themiddleandlowercrustmaterialsweredetachedfromthetopofthesubmantleplumetothesurroundingswhilethesub-mantleplumematerialsweredetachedoutward.Whenthedetachedmiddleandlowercrustcometotheboundaryoffaultbasinsintheuppercrust,theywillbeobstructedbytheorogeniczoneandthedetachmentwillgoslower.Theshearingbetweenthemwillcausethestresstoaccumulateandreleasealternatively,sothatearthquakesoccurredfrequentlyintheareasofsub-mantleplumeanditssurroundings.

简介：Yunmeng掸人变形核心建筑群(MCC)由更低的板，上面的板和分开地区组成。分开地区由组成可锻砍地区(糜棱岩地区)，chloritizedmicrobreccias地区和易碎的差错飞机。可锻砍地区包含mylonitic岩石，protomylonites，和糜棱岩。从用Rf/方法的那些岩石的长石porphyroclasts的有限紧张大小证明紧张紧张从mylonitic岩石(Es=0.660.72)增加到protomylonites(Es=0.660.83)，并且到糜棱岩(Es=0.711.2)。紧张类型接近变平紧张。运动学的涡度由极的Mohr图估计了建议糜棱岩的生叶和线条(0.47