东濮凹陷“高阻红层”的孢粉组合及地质时代
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摘要
"高阻红层"是东濮凹陷北部整合于上二叠统石千峰组之上、不整合于新近系-古近系之下的一套具高电阻率的河湖相红色地层的俗称,根据地层赋存状况、岩性、测井资料、地震资料等曾被归入下三叠统。新近发现在"高阻红层"中含有二叠纪、三叠纪孢粉植物群,卫77-3井(井深2854.31m)和卫77-4井(井深2815.13m)的孢粉组合分别显示早三叠世早期和晚二叠世晚期的时代色彩;"高阻红层"的层位应属上二叠统上部—下三叠统下部。
The "High-resistivity Red-beds" lithological unit in the Dongpu Depression is a series of red co-loured fluvial and lacustrine deposits with higher than normal resistivity,conformably overlying the Permian Shiqianfeng Formation and in turn overlain unconformably by Palaeogene sediments.These red beds were previously assigned to the Early Triassic based on lithostratigraphic well-logging and seismic evidence.The present study shows however that they contain both Permian and Triassic palynofloras.For example,the spore-pollen assemblage from depth 2 854.31 m of well Wei 77-3 is dominated by the typically Triassic element Lundbladispora associated with only some typi-cally Permian Lueckisporites,Jugasporites and Scutasporites,indicating overall an early Early Triassic age.On the other hand the assemblage from 2 815.13 m in well Wei 77-4 consists mainly of the characteristically Permian pollen Luecki-sporites,Jugasporites,Scutasporites and Crucisa-ccites,with only rare occurrences of the typically Triassic Lundbladispora and Triadispora,indicating overall a late Late Permian(Lopingian:Changhsingian)age.
The "High-resistivity Red-beds" lithological unit in the Dongpu Depression is a series of red co-loured fluvial and lacustrine deposits with higher than normal resistivity,conformably overlying the Permian Shiqianfeng Formation and in turn overlain unconformably by Palaeogene sediments.These red beds were previously assigned to the Early Triassic based on lithostratigraphic well-logging and seismic evidence.The present study shows however that they contain both Permian and Triassic palynofloras.For example,the spore-pollen assemblage from depth 2 854.31 m of well Wei 77-3 is dominated by the typically Triassic element Lundbladispora associated with only some typi-cally Permian Lueckisporites,Jugasporites and Scutasporites,indicating overall an early Early Triassic age.On the other hand the assemblage from 2 815.13 m in well Wei 77-4 consists mainly of the characteristically Permian pollen Luecki-sporites,Jugasporites,Scutasporites and Crucisa-ccites,with only rare occurrences of the typically Triassic Lundbladispora and Triadispora,indicating overall a late Late Permian(Lopingian:Changhsingian)age.
引文
Hou Jing-peng(侯静鹏),2004Two sporo-pollen assemblages ofGuodikeng Formation and discussion on the Permo-Triassicboundary in Junggar Basin,Xinjiang.Professional Papers ofStratigraphy and Palaeontology(地层古生物论文集),28:177—198(in Chinese with English abstract).
Hou Jing-peng(侯静鹏),Ouyang Shu(欧阳舒),2000.Palynoflorafromthe Sunjiagou Formation in Liulin County,Shanxi Pro-vince.Acta Palaeontologica Sinica(古生物学报),39(3):356—368(in Chinese with English abstract).
Jiang Fei-hu(蒋飞虎),Deng Rui-jian(邓瑞健),Yang Jing(杨静),2006.The Mesozoic-Paleozoic Stratigraphy of the ZhongyuanPetroliferous Area.Beijing:PetroleumIndustry Press.1—174(in Chinese).
Ouyang Shu(欧阳舒),Hou Jing-peng(侯静鹏),1999.On characte-ristics of Cathaysian palynoflora.Acta Palaeontologica Sinica(古生物学报),38(3):261—283(in Chinese with English sum-mary).
Ouyang Shu(欧阳舒),Zhu Huai-cheng(朱怀诚),2007.Query theassumption of“end-Permian fungal spike event”,with specialreference to the Permo-Triassic transitional palynofloras.ActaPalaeontologica Sinica(古生物学报),46(4):394—410(in Chi-nese with English summary).
Ouyang Shu(欧阳舒),Zhang Zhen-lai(张振来),1982.Early Triassicpalynological assemblage in Dengfeng,northwestern Henan.Acta Palaeontologica Sinica(古生物学报),21(6):685—696(inChinese with English abstract).
Qu Li-fan(曲立范),1982.The palynological assemblage from theLiujiagou Formation of Jiaocheng,Shanxi.Bulletin of the Insti-tute of Geology,Chinese Academy of Geological Sciences(中国地质科学院地质研究所所刊),4:83—93(in Chinese with Eng-lish abstract).
Qu Li-fan(曲立范),Yang Ji-duan(杨基端),Bai Yun-hong(白云洪),Zhang Zhen-lai(张振来),1983.Apreliminary discussion on thecharacteristics and stratigraphic divisions of Triassic spores andpollenin China.Bulletin of Chinese Academy of Geological Sci-ences(中国地质科学院院报),5:81—94(in Chinese with Eng-lish abstract).
Yang Xue-ying(杨学英),2002.Late Permian spore-pollen assembla-ges and their thermal alteration index and organic matter typesfromthe Longtan Formation in southern Jiangsu.Acta Micro-palaeontologica Sinica(微体古生物学报),19(3):309—315(inChinese with English abstract).
Yu Jing-xian(余静贤),Sun Meng-rong(孙孟蓉),Zhang Wang-ping(张望平),Qu Li-fan(曲立范),Hou Jing-peng(侯静鹏),YangJi-duan(杨基端),Sun Su-ying(孙素英),1986.Palynological as-semblage sequence from late Permian to Tertiary in northernXinjiang.Bulletin of the Institute of Geology,Chinese Academyof Geological Sciences(中国地质科学院地质研究所所刊),15:140—151(in Chinese with English abstract).
Zhan Jia-zhen(詹家祯),1991.The Mesozoic stratigraphic divisionfromthe well Lunnan no.1andits fossil evidences.Xinjiang Pe-troleum Geology(新疆石油地质),12(4):293—300(in Chinesewith English abstract).
Zhao Wei(赵蔚),Jiang Fei-hu(蒋飞虎),Tang Shu-yan(唐淑艳),2007.The geologic age,stratigraphic subdivision and correlationof the“high resistivity red bed”in the Dongpu Depression,Bo-haisea coastal basin.Journal of Stratigraphy(地层学杂志),31(1):50—55(in Chinese with English abstract).
Hou Jing-peng(侯静鹏),Ouyang Shu(欧阳舒),2000.Palynoflorafromthe Sunjiagou Formation in Liulin County,Shanxi Pro-vince.Acta Palaeontologica Sinica(古生物学报),39(3):356—368(in Chinese with English abstract).
Jiang Fei-hu(蒋飞虎),Deng Rui-jian(邓瑞健),Yang Jing(杨静),2006.The Mesozoic-Paleozoic Stratigraphy of the ZhongyuanPetroliferous Area.Beijing:PetroleumIndustry Press.1—174(in Chinese).
Ouyang Shu(欧阳舒),Hou Jing-peng(侯静鹏),1999.On characte-ristics of Cathaysian palynoflora.Acta Palaeontologica Sinica(古生物学报),38(3):261—283(in Chinese with English sum-mary).
Ouyang Shu(欧阳舒),Zhu Huai-cheng(朱怀诚),2007.Query theassumption of“end-Permian fungal spike event”,with specialreference to the Permo-Triassic transitional palynofloras.ActaPalaeontologica Sinica(古生物学报),46(4):394—410(in Chi-nese with English summary).
Ouyang Shu(欧阳舒),Zhang Zhen-lai(张振来),1982.Early Triassicpalynological assemblage in Dengfeng,northwestern Henan.Acta Palaeontologica Sinica(古生物学报),21(6):685—696(inChinese with English abstract).
Qu Li-fan(曲立范),1982.The palynological assemblage from theLiujiagou Formation of Jiaocheng,Shanxi.Bulletin of the Insti-tute of Geology,Chinese Academy of Geological Sciences(中国地质科学院地质研究所所刊),4:83—93(in Chinese with Eng-lish abstract).
Qu Li-fan(曲立范),Yang Ji-duan(杨基端),Bai Yun-hong(白云洪),Zhang Zhen-lai(张振来),1983.Apreliminary discussion on thecharacteristics and stratigraphic divisions of Triassic spores andpollenin China.Bulletin of Chinese Academy of Geological Sci-ences(中国地质科学院院报),5:81—94(in Chinese with Eng-lish abstract).
Yang Xue-ying(杨学英),2002.Late Permian spore-pollen assembla-ges and their thermal alteration index and organic matter typesfromthe Longtan Formation in southern Jiangsu.Acta Micro-palaeontologica Sinica(微体古生物学报),19(3):309—315(inChinese with English abstract).
Yu Jing-xian(余静贤),Sun Meng-rong(孙孟蓉),Zhang Wang-ping(张望平),Qu Li-fan(曲立范),Hou Jing-peng(侯静鹏),YangJi-duan(杨基端),Sun Su-ying(孙素英),1986.Palynological as-semblage sequence from late Permian to Tertiary in northernXinjiang.Bulletin of the Institute of Geology,Chinese Academyof Geological Sciences(中国地质科学院地质研究所所刊),15:140—151(in Chinese with English abstract).
Zhan Jia-zhen(詹家祯),1991.The Mesozoic stratigraphic divisionfromthe well Lunnan no.1andits fossil evidences.Xinjiang Pe-troleum Geology(新疆石油地质),12(4):293—300(in Chinesewith English abstract).
Zhao Wei(赵蔚),Jiang Fei-hu(蒋飞虎),Tang Shu-yan(唐淑艳),2007.The geologic age,stratigraphic subdivision and correlationof the“high resistivity red bed”in the Dongpu Depression,Bo-haisea coastal basin.Journal of Stratigraphy(地层学杂志),31(1):50—55(in Chinese with English abstract).
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