河南中部晚二叠世与早三叠世地层划分对比及几个地质问题的商榷

本区二叠系与三叠系的接触关系,以往一直认为是整合接触.作者通过露头和钻井剖面实际资料的综合分析和对比,认为该区的晚二叠系石千峰组与早三叠系方山组之间存在沉积间断,即石千峰组末期有一次上升运动(华力西末期运动),二叠系与三叠系是假整合接触.这次华力西末期运动,对煤系地层油气的生成、运移和聚集都有一定的影响.

DIVISION AND CORRELATION OF UPPER PERMIAN-LOWER TRIASSIC IN MIDDLE PART OF HENAN AND DISCUSSION ON SOME GEOLOGICAL TOPICS

The relationship between the sequences of Permian and Triassic is previously considered as conformable contact.The author of this paper suggests there is a depositional break between Shiqainfeng Formation of Upper Permian and Fangshan Formation of Lower Triassic,according to the analysis and correlation of observed informations from plenty of outcrop sections and well loggings.That is to say there is an uplift movement at the end of Shiqainfeng Formation (the end of Varisian movement).It is believed that the relationship between the sequences of Permian and Triassic is disconformable contact which would certainly influence the generation,migration and accumulation of oil/gas in the coal measure of this area.