• 责任者：Wang Jiahao (Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Chen Honghan
• 刊名：Acta Geologica Sinica
• 出版年：2009
• 卷期：83(4)
• 关键词：湖泊沉积作用 ; lacustrine sedimentation ; 吉林 ; Jilin Province
• 页码：p.550-557
• 图表：7 illus., 1 table, 1 plate, 19 refs.
• 分类号：0803
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

Yitong graben is a strike-slip and extensional basin in Meso-Cenozoic, East China. After seismic profile explaining and well core observing, a large-scale sublacustrine fan complex with an area of 400 km² and thickness of 250 m was identified at the bottom of Member Yong-1, Paleogene of the graben. As the low-stand fan of three-order sequence Yong-1. It was mainly composed of fine to middle-grained sandstone and a little gravel stone which bore many sandstone breccias, mudstone shivers or muddy gravels together with various pene-contemporaneous deformation structures such as convolute bedding, liquefied distortion, ball and pillow structure, microfault etc. , so it was determined to be dominantly subaqueous debris flow deposit due to slump. Owing to the farraginous lithology composite and very poor reservoir capacity, this sublacustrine fan was not favorite to oil and gas accumulation although its size was very large.