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16320095DiscussiononpalaeoecologyandpalaeoclimateofBaiyinchaganDepressionLiShoujun(SchoolofEarthSciencesandResources,ChinaUniversityofGeosciences,Beijing100083,China)ThispaperdiscussesonthepalaeoecologyandpalaeoclimateofBaiyinchaganDepressionfromthemanyaspectsasthecomposition,occurrence,abundance,individualmorphologicalfeaturesofostracodefossilsandsporopollenassemblagefeatures.ItisthoughtthatthedepositionofAersanFormationistheinitialdevelopmentofMesozoicfaultedlakebasinwithbigelevationdifference,richsourceandundevelopedorganisminBaiyinchaganDepression.Theclimateofthisperiodisdrytropicaltosubtropicalzone.WhenTenggeerFormationdeposits,thelakebasinspreads,thewaterbodybecomesdeeperandthebioactivitybecomesstrong.Theclimateisalsodrytropicaltosubtropicalzone.WhenDuhongmuFormationdeposits,thelakebasinspreadsmorewidely,thewaterbecomesdeeperanddeeper,thesalinityissuitableformanyvarietiesoforganismstogrow.Theclimateturnstobewettropicaltosubtropicalzone.ThedepositionofDu2Memberisthetopdevelopmentofthisfaultedlakebasin.WhenSaihantalaFormationdeposits,thebasinbecomestodisappearwithnoorganismdevelopment.Theclimateturnstobedrytropicaltosubtropicalzoneagain.Keywords:ostracodefossil,sporopollen,palaeoecology,palaeoclimate,BaiyinchaganDepression.:2008-12-26;:2009-02-27。:,,1964,,,,,。E-mail:lishj@sinopecmi.org.cn。,。,150km,15~28km,3200km2,,。、、、[1]。11.1,。1110001154。(200g)21,。,。、。、,。,3:1),;2),;3),(,100083)、、,,,,,—;,,,,—;,,,,,,—,;,,,,—。;;;;:TE121.3+1:A:1005-8907(2009)03-021-03FAULT-BLOCKOIL&GASFIELD2120095163。,,(1)。1,,。、、,。,,,、,()。,。,,,。,,(1)。,、。11.2,,。,。,,。[2],,。,。1.3,,。[3],,。[4],。[5],,,。4:1),,26,48%,;2)、,、,23,42%,;3)、,2,3%;4),、、3,5%,2。,,,,、。4,,。,、。2,,。,,。,。、、、、、、,、、、、,、—、、、、——、、2216320095。,,。,;、,;,[6],;,。,、,—。[7],,—。。,,、,,[8-9]。,—。2.1,,、,,、,—。2.2,,,,,。,,,、、、,,—。2.3,,,,,、、、,,、,、,、、。,—。2.4,,,、、、、、、、。、,,、、、、。—。3,,,,—;,,,,—;,,,,,,—,、;,,,,—。[1],.[J].,1996,23(2):34-42.[2],,,.[M].:,1986.[3],.[M].:,1994.[4].[J].,1985,5(2):37-50.[5].[C]//..:,1992.[6],.[M].:,1990.[7],.[C]//.().:,1992.[8].、[M]//,..:,1995.[9].[M]//.-.:,1989.():23
本文标题:白音查干凹陷古生态及古气候探讨
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