简介:Deterministic,probabilisticandcomposite-gradingmethodsareusedtogetthepossiblelocationsofstrongearth-quakesinthefutureinNorwestBeijinganditsvicinitybasedonthequantitativedataandtheiraccuracyaboutactivetectonicsintheresearchareaandbyordering,somequestionsintheresultsarealsodiscussed.Itshowsthatthemostdangerousfaultsegmentsforstrongearthquakesinthefutureinclude:segmentsBandAofthesouthernboundaryfaultoftheYangyuanbasin,thesouthernboundaryfaultoftheXuanhuabasin,theeastsegmentofthesouthernHuai¢anfaultandtheeastsegmentofthenorthernYanggao-Tianzhenfault.ThemostdangerousareaisYangyuan-Shenjingbasin,thesecondoneisTianzhen-Huai¢an-XuanhuabasinandthethirddangerousareasareWanquan-ZhangjiakouandnortheastofYuxiantosouthwestofFanshan.
简介:0IntroductionTheJapaneseIslandsconsistoffivevolcanicarcs(Fig.1).TheNorth-EastandSouthWestJapanarcstogetherformtheHonshuarc,towhichtheKurilearcjoinsatHokkaido,whereastheIzu-MarianaarcjoinsatIzu-FossaMagna,andtheRyukyuarcjoinsatKyushu.Theseregionswherevolcanicarcsconverge,aretermed'islandarcjunctions'.
简介:Themegamorphostructuresofcentraltype(mega-MCT)andtransrcgionalfaultzoncs-lincaments(TL)arethemainstructuresoftheeontincntalmargin.Thesestructuresareecryaneient(Precambrian)andrepeatedtcetonic-magmaticactivitywascharactcristicfortheminPhancrozoic.Thefirstofthemis2’54’0thousandkmindiameterandformtwo"r
简介:Inthispaper,wedeterminedanearthquakesequencelocationintheXingfengjiangareafromJune,2007toJuly,2014andthe3DP-wavevelocitystructurebyasimultaneousinversionmethod.Onthatbasis,westudiedtheoccurrencefeaturesofactivetectonicsandtheearthquakesourcemechanism.Theresultsshowthatthereservoirfracturesystemhasatendencytoincreasewithgradualdepthfromsoutheasttonorthwest,consistentwithgravitationalfieldresearchresults.Thereare4highvelocityzones(HVZ)underthedepthofthe7km-12kmcrustbetweentheXinfengjiangReservoirdamandXichangDistrict,Dongyuan.ThemaxvelocityofthebiggestHVZwhichisunderXichangis6.3km/s.Underthereservoirdamthereisastrongtectonicdeformationzone,asthecenterexitRenzishifault(F2),Nanshan-Aotoufaults(F4),Heyuanfault(F1)andShijiao-Xingang-Baitianfault(F5),7earthquakeswithML≥5.0(includingM6.1inMarch,1962)occurredatthehighgradientzoneoftheHVZⅢandHVZⅣedgewhichhasbeenunderthereservoirdamsince1960,withrelativityenergyreleasingmorethoroughly.ModerateseismicactivityoccurredattheHVZⅠedgewhichhasbeenunderXichangsince2012,andisadangerzoneforM5.0earthquakesinthefuture.
简介:ConsideringitscentralpositioninEastGondwanareconstructions,theIndiansubcontinentfiguresprominentlyinthestudies,whichwereenvisagedundertherecentlyconceptualizedinternationalproject—""LEGENDS""(LithosphericEvolutionofGondwanaEastfrominterdisciplinaryDeepSurveys),amajorinitiativebyinternationalscientificcommunitytostudycontinentsofthesouthernhemisphere.TheCC-8subcommitteeoftheInternationalLithosphericProgramme(ILP)hasalsoacceptedtheLEGENDSinitiative.
简介:Thenotableauthorityontectonicsandthehistoryofgeosciences,ProfessorCelalSengorfromIstanbul,hasproducedanotherremarkablebook-which,ashetellsthereader,grewrapidlyfromaninitialpaperintoamassivetome.JustasGeorgesCuvierlikedtheideaof‘burstingthelimitsoftime',soProfessorSengorhasagain‘burstthelimitsofapaper'!
简介:尽管尼内蒂埃斯特·理兹附近的Indo澳大利亚的板为理解新板边界的形成是重要的,它的构造问题是复杂的,他们中的大多数糟糕被知道。这份报纸基于深测术,严肃和magnetics的数据做了详细构造分析。深测术和严肃地图显示出许多褶层的词法特征,它由于在印第安人和亚洲盘子之间的碰撞与Indo澳大利亚的板的intraplate变丑有关。严肃异例显示出破裂地区的结构,它被传播的seafloor和指责的变换引起。褶层和破裂地区的特征与弥漫的板边界和重新定义的板部件将发生在Indo澳大利亚的板以内的假设一致。另外,编了磁性的数据表明磁性的线条,放弃的传播中心,向南方的山脉跳,板打手势。这些特征为重建学习区域的构造进化历史提供有用信息。磁性的异例建议变换差错的一条另外的板边界打字发展中。
简介:Theprocess-faciestypesoftheDevonianvolcanicsedimentarysuccessionsinnorthernXinjiangincludeexplosivefacies,effusivefacies,pyroclastic-calcareous-terrigenoustempestitefacies,andcoarse~-,medium~-andfine-grainedpyroclasticturbiditefacies,volcaniceruptiontsunamitefacies,syndepositionalandsoft-deformedseismitefacies,sandyandsilt-muddycontouritefacies.Thispaperpresentstheircharacteristicsanddiagnosticindicators,anddiscussesthetemporalandspatialstructuresofboththeprocess-faciesandtheenvironment-faciesoftheZhifangsection,eastJunggar,andtheMountSarburtisection,westJunggar,andtheirrelationtoplatetectonism.Theauthorholdsthatthefaciesanalysisdominatedbyprocess-faciesisthefaciesanalysis’nucleusinanorogenicbeltandactivecontinentalmargin.