stages:laterjuraic-earlycretaceous,latercretaceousandoligcene-miocene.
northchinabasinandtalimubasininthenorthernpartofchinainpaleozoicarealllocatedinstablecraton,whoseareaisbigandinwhichthedepositionandstructureisstableandthesedimentarylayeristhin,whosegeothermalgradientandpaleotemperatureislow.tuloufanª²hamibasinandzhungeerbasinlocatedinhasakesitanplateunderwentexteionª²rift,theactivityofwhichissevereandthegeothermalgradientofwhichishigherthantalimuandnorthchinabasi.
inlatermesozoicthenorthernpartofchinaiseffectedbysurround

plateanditsactivityisintee.accordingtoactivity,itcanbedividedintofourunits(1).innortheastuniterlianandsongliaobasi,inwhichvolcanismissevereandcrustisrifted,formedajuraicandcretaceousfaultedbasinandthegeothermalgradientishigh.(2)innorthchinaunitordosbasin,qihuibasin,bohaiwanregion,inlatermesozoicgeothermalgradientofwhichwasevidentlyrising.ateastbohaiwanregionwasupliftingandcooling.atwestqihuiandordosbasinwasdepreingandthepaleotemperaturewasrising.(3)ontheeastofaerjinfaultinthealashanandhexicorridorareathejiuquanbaingrouandyingenbasinextendedfromjuraictoearlycretaceousandformedmanyfaultedbasi.thestructuralpatternofthefaultedbasiissimilartoerlianbasininnortheastchina,butvolcanicactivityisweakandgeothermalgradientishigh.(4)onthewestofaerjinfaulttuloufanhami,talimu,zhungeerbasiarealldepreionbasi,thegeothermalgradientsinlower,tuloufanhamibasiactivityissevererthantalimubasinandzhungeerbasin,thegeothermalgradientihigherthanthetwobasi.
inlatermes

ÉÏÒ»Ò³  [1] [2] [3] [4] [5] [6] [7] [8] ÏÂÒ»Ò³