简介:LyingonthewestedgeofDongtingLake,theTaiyangshanareainHunanProvinceispartofahillyregionwhichhasupliftedsincetheLateCenozoic.AccordingtofieldinvestigationofthesixexistingfaultsintheTaiyangshanarea,wefoundthatfourofthemarenotactiveintheQuaternary,andthattheGangshi-HefufaultislikelytohavebeenactiveintheearlyMid-Pleistocene.ThegeologicalevidencederivedsuggeststhattheXiaowupufaultwasactivefromthelateMid-Pleistocenetotheearlylate-Pleistocene.ItcutthestratumwithaTLageof123±10kaBPandhasthepropertyofthrusting.TheresearchresultsareofgreatsignificanceforunderstandingtheseismogenicstructureoftheChangdeearthquakewithM63/4in1631.