【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。更多还原

【Abstract】 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.更多还原