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四川盆地及邻区二叠纪梁山-栖霞组沉积盆地原型及其演化 - 岩石学报.pdf

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10000569/2017/033(04)131737 ActaPetrologicaSinica 岩石学报 四川盆地及邻区二叠纪梁山栖霞组沉积盆地原型 及其演化  黄涵宇 何登发  李英强 王贝  HUANGHanYu,HEDengFa ,LIYingQiangandWANGBei 中国地质大学能源学院,北京 100083 SchoolofEnergyResources,ChinaUniversityofGeosciences,Beijing100083,China 20160811收稿,20161202改回 HuangHY,HeDF,LiYQandWangB2017TheprototypeanditsevolutionoftheSichuansedimentarybasinand adjacentareasduringLiangshanandQixiastagesinPermianActaPetrologicaSinica,33(4):1317-1337 Abstract  TheupperYangtzeregionbegantoexperienceinlargescaletransgressionandformingarelativelystablecarbonate platforminPermianUnderstandingthesedimentaryfillingpatternandthetectoniccharacteristicoftheprototypebasinisthekeyto revealtheformationmechanismoftheSichuanBasin,andmayalsohelptobetterunderstandevolutionprocessofthetypicalSichuan multicycleandsuperimposedbasinOnthebasisofpredecessors’researchresults,wereconstructthetectonicandpalaeogeographic frameworkoftheprototypebasinandanalyzethetectonicsedimentaryevolutionprocessduringLiangshanandQixiadepositionstagesby comprehensivelymakinguseofboreholeandoutcropdataMainlycontrolledbytheancientlandformofhighinthecentralandlowin theeastandwestfromLateCarboniferousandthelargescaletransgression,theLiangshanstagewascharacterizedbythetidalflatand shorefacesedimentarysystem;andsubsequentlytransitionedtoanrelativelystablecarbonateplatformsedimentaryenvironmental duringtheearlystageofQixiadeposition,influencedbyextendingaction,thesealevelrisesrelativelyandcharacterizedbyopen platformsedimentaryenvironmental;andduringthelaterstageofQixiadeposition,thesealevelfallsrelativelyandcharacterizedby restrictedplatform,platformmarginbeachsedimentaryenvironmentalThus,itrevealsthattheSichuanbasinanditsadjacentareas mainlyinfluencedbyextendingactionandcouldberecognizedasatypicalintracratonicdepressionwithedgeriftbasinThecyclical changeofthesealevelanddifferentialsettlementofthebasinplayanimportantroleintheevolutionofthes
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