安徽沿江地区中二叠统孤峰组沉积相分析  

Sedimentary Facies of the Middle Permian Gufeng Formation in the Region along the Yangtze River, Anhui Province

作　　者：王俊涛[1] 徐锦龙[1] 沈仕豪 廖圣兵[2] 郑红军 WANG Jun-tao;XU Jin-long;SHEN Shi-hao;LIAO Sheng-bing;ZHENG Hong-jun(Anhui Institute of Geological Survey,Hefei230001;Nanjing Center,CGS,Nanjing210016)

机构地区：[1]安徽省地质调查院,合肥230001 [2]中国地质调查局南京地质调查中心,南京210016

出　　处：《四川地质学报》2022年第2期187-193,共7页Acta Geologica Sichuan

基　　金：中国地质调查局地质调查项目(12120114019801);安徽省地质矿产勘查局科技项目(KJ2012-01)。

摘　　要：二叠系孤峰组页岩发育较好,具有厚度大、有机质丰度高、保存条件较好的特点,在近年的钻井中钻遇孤峰组页岩气,显示孤峰组具有较好的页岩油气发育物质基础和资源潜力,是后续值得进一步勘探的层位。因此,本文在前人工作成果基础上,结合岩性、化石带及地层对比,重新梳理了区内主要目的层系的地层岩性特征。建立了二叠纪沉积环境综合模式;选择典型剖面进行了沉积相(相-亚相-微相)综合分析,揭示孤峰组沉积作用、构造沉降与海平面变化的关系。以亚相或微相为编图单元,编制了中二叠世岩相古地理图,总结了岩相古地理特征,分析了其古地理演化。The Permian Gufeng Formation is well developed and characterized by large thickness, abundant organic matter which shows has shale oil and gas resource potential. This paper has a discussion on the lithologic characteristics of the main target beds in the study area on the basis of previous work, combined with lithology,fossil belt and stratigraphic correlation. A comprehensive model of Permian sedimentary environment is established, and a comprehensive analysis of sedimentary facies(facies-subfacies-microfacies) is carried out for a typical section which reveals the relationship between sedimentation, tectonic subsidence and sea level change in the Gufeng stage. Taking subfacies or microfacies as mapping unit, a lithofacies and paleogeographic map in the Middle Permian is compiled, the lithofacies and paleogeographic characteristics in the Middle Permian are summarized, and the paleogeographic evolution in the Middle Permian is analyzed.

关 键 词：沿江地区 孤峰组 沉积相 古地理 

分 类 号：P534.46[天文地球—古生物学与地层学]