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内蒙古早二叠世构造古地理的再造
10000569/2014/030(07)185866 ActaPetrologicaSinica 岩石学报
内蒙古早二叠世构造古地理的再造
1 2 1
邵济安 唐克东 何国琦
1 2 1
SHAOJiAn,TANGKeDongandHEGuoQi
1北京大学造山带与地壳演化教育部重点实验室,地球与空间科学学院,北京 100871
2沈阳地质矿产研究所,沈阳 110034
1MOEKeyLaboratoryofOrogenicBeltsandCrustalEvolution;SchoolofEarthandSpaceSciences,PekingUniversity,Peking100871,China
2ShenyangInstituteofGeologyandMineralResource,Shenyang110034,China
20131001收稿,20131215改回
ShaoJA,TangKD andHeGQ2014EarlyPermiantectonopalaeogeographicreconstructionofInnerMongolia,
ChinaActaPetrologicaSinica,30(7):1858-1866
Abstract IncontrastoftherecentlypromotedviewofpointthattherewasaPaleoAsianOceanplatesubductingtowardsthe
continentsonitsnorthandsouthsidesintheEarlyPermian,thepresentauthorspreferadifferentunderstandingThroughcompilation
ofatectonopalaeogeographicmapoftheconcernedareabasedonallthefactsaboutthesedimentarypetrography,palaeogeography,
biologicassociation,detritalmaterialsofterrigenousorigin,andhydrocarbonsourcerockintheEarlyPermian,itseemstotheauthors
thatwhatexistedbetweentheCentralAsianmassifandtheNorthChinaCratonwasaLatePaleozoicepicontinentalseaandriftinstead
ofalargescaleoceanexperiencingspreadingandclosureOurstudiesrevealtheactualevolutionoftheconcernedareaintheEarly
PermianIntheearlystage,thesedimentaryprocessaccompanyingstrongeruptionofbasicacidicvolcanicrocksiscontrolledbythree
synsedimentaryriftswithnearEWstrike,withthethicknessesofsedimentaryrocksofthelittoralshallowmarinefaciesandvolcanic
rocksbeing>8000m,>5000m,and2900mseparatelyfromnorthtosouthTheviewpointofsedimentationbeingcontrolledbydeep
faultsissupportedbythedeepgeophysicaldataThesedimentalrocksoftheearlystagearemainlyconsistedofcoarseclasticrocksin
whichthegreywackesandarkoseswithlowermaturityaredistributedwidelyBesides,thedenudationareasarecomposedofneogenic
continentalcrustsandtheproximalsedimentsarecharacterizedbyquickaccumulation,asseenfromcompositions
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