摘要
StudyofseismicactivityintheKuqaareaenablesustoinfersomepossibleactivefaultsinbasementfromtheePicentraldistributionondifferentprofiles.Therelationsbetweenactivefaultsinthebasementandsurfacestructuresareanalyzedandthedifferencebetweensedimentarycoverandbasementintheirdeformationcharacteristicsandthegenesisarediscussed.Thefollowingconclusionshavebeendrawn:(1)theepicentraldistributionindicatesthat,theeastQiulitagandsouthandnorthQiulitagdeepfaultsinthebasementcorrespondtotheeastandwestQiulitaganticlines,respectively.Moreover,deepfaultsalsoexistbeneaththeYiqiklikandYakenanticlines.Itindicatesthattheformationofsurfacestructuresiscontrolledbydeepstructures;(2)ANE-trendingstrike-slipfaultdevelopsalongthelinefromthewesternterminationofYiqiklikstructuretoDongqiuWell5andaNW-trendingactivefaultonthewesternsideofBaicheng.ThetwoactivefaultsacrossthetectonicstrikearethemaincausesfortectonicsegmentationoftheKuqadepressionandpossiblythecauseforthemiddlesegment(Kuqa-Baicheng)ofthedepressiontobemoreshortenedthanbothitseasternandwesternterminations;(3)Thedifferencebetweenthesedimentarycoverandbasementintheirdeformationcharacteristicsdependsmainlyonthedifferentpropertiesofmediabetweenthem.Thelithosphericstrengthofthebasementinthebasinisfairlyhigh,whichdeterminesthebasementdeformationtobemainlyofbrittlefractureseismicactivity.Whilethestrengthofsedimentarycoverislow,wherethereexistweakthinlayers,suchascoalandgyps.Undertheeffectofstrongtectoniccompression,thesedimentaryrocksmayundergostrongviscousorplasticflowdeformation;meanwhile,anaseismicdetachmentmaytakeplacealongtheweaklayers.
出版日期
2004年04月14日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
