Tectonically,theareaunderstudyisknownastheSoutbeastChinaDiwaRegionwhicbbasexpcriencedthefollowingthrccstagesoftcctonicdeve1opment:l)thegeosynclinalstage,2)theplatformstage,3)thediwastage.Inthediwastagcandinitsmaximum-mobilitypcriodinparticular,tcctonicandisneousactivitieswcrestrong,extcnsive,ftcqucn