themeanvalueis69mw/m2.erlianbasinhasmanydepreioandeverydepreionisdifferentindeposition.presentgeothermalgradientandthethresholdofoilgenerationisdistinctlydifferentineverydepreionandthethresholdofoilgenerationiscontrolledbypaleotemperature.incretaceousthethermalgradientis3.50-5.50℃/100m,meanofwhichis4.66℃/100m.thethermalgradientofmiddlejuraicishigher.
ordos,qihuiandbohaiwanbasiinnorthchinaarealllocatedinnorthchinacraton.depositionandstructureofnorthchinabasinisstableandthethermalgradientislowinpaleozoic.inlatermesozoicnorthchinabasinunderwentaseverestructuralmovement,whichmaketheeastofnorthchinabasinriseandthewestofitsuide.thetemperatureintheeastisonthedecreaseandthewestisontheincrease.inlatermesozoicthegeothermalgradientofordosbasinis3.30-4.80℃/100m,mainvalueofwhichis4.00℃/100m.thegeothermalgradientofqihuibasinis5.56℃/100m.intheeasternupliftedareaofnorthchinageothermalgradientis5.25℃/100m.sincecenozoicordosandqihuibasiniswhollyrisingandonthedecreaseoftemperature,butbohaiwanbasinstretchedandfaultsuidedandbecameariftbasinandthepaleotemperaturegraduallyincrease.thepresentgeothermalgradientsofordosandqihuibasinare2.20-3.10℃/100mand2.60-3.00℃/100m.theheatflowvaluesare63.4mw/m2and61mw/m2separately.thegeothermalgradientandheatflowvalueofbohaiwanbasinare3.58℃/100mand61.53mw/m2.
jiuquanbasingrouinthehexicorridorisformedbythestackingoftwostagedifferentpropertyanddifferentgenerationbasi.itwasriftbasifromlaterjuraictoearlycretaceousandsqueezedsagbasinsincecenozoic.thepresentgeothe
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