Title: Formation Environment and Controlling Factors of Organic-rich Shale of Lower Cambrian in Upper Yangtze Region
Abstract: The research of controlling factors on organic-rich shale of Lower Cambrian in Upper Yangtze region is one of the basic questions for forecasting favorable shale gas exploration area.Through analyzing samples of typical organic-rich black shale outcrop profile in Upper Yangtze region,the Early Cambrian paleo-environment of marine organic-rich in Upper Yangtze region is restored and the depositional environment comprehensive distinguished table is established using information from rocks,minerals,organic matter charactersics,feature elements.In Early Cambrian,the black shale is formed in a typical hypoxia.The Lower Cambrian black shale of Upper Yangtze region is a combined result of paleostructure,paleoclimate,sea level changes,paleoocean currents and hydrothermal activity,and so on.The shale development model of sea level-ascending current-hydrothermal activity-stratified water bodies-hypoxia is built.Hydrothermal activity and ascending current promote the organisms to thrive and provide the material basis for the formation of organic-rich shale.Rising sea level and ascending current not only lead to stratified water bodies,but also affect the distribution range of organic-rich shale.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 9
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot