Inthepresentanalysisontherelationshipsamongthedepthoflithospherebrittlefracture,seismotectonicsandgeothermalanomalousactiveinTibetanplateauwereinvestigatedusingtheseismicdadafromISCandChineseseismicnetandgeothermaldata.Theresultssuggestthattheregionofanomalouslygeothermalactivityalmostcoincideswiththatofthenormalfaultingtypeearthquake.Thegeothermalanomalyactivityregioncoincidesspatiallywiththatoftheeventsdeeperthan60kmaswellas.Thenormalfaultingearthquakesmaybemainlytectonicactivityregimesuntil110kmdeepinthethermalanomalyregion.ThestrikedirectionsofeventsarelikelytheN-Sdirection,coincidingwiththestrikeofthethermalanomalyactivebelts.Theearthquakesalignalongthenormalfaultsandfaulted-depressionzonewiththeN-Sdirection.Thethermalanomalyactivityalsodistributesalongthefaulted-depressionzone.Manyeventsdeeperthan60kmexistintheanomalouslygeothermalactivityregionintheplateau.Eventsextendtobottomofthelithosphereof110kmfromthesurface,likecolumnarseismiccrowd.ThelithosphereextendsalongtheE-WdirectionduetotheE-WextensionalstressinthecentralandsouthernTibetanplateau,altitudeoftheplateau.ThetensionalstressintheE-WresultsinthelithospherefracturesandthenormalfaultsstrikingN-Sdirection,grabensandfaulted-depressionzones.Thermalmaterialfromtheasthenospherewellsupwardtothesurfacealongdeepseismicfracturesandfaultsthroughthethickcrust.TheanomalouslythermalactivitiesareattributabletotheupwellingthermalmaterialfromthemantleinthealtitudeofTibetanplateau.
