Segmented evolution of Deyang-Anyue erosion rift trough in Sichuan Basin and its significance for oil and gas exploration, SW China

MA Kui,WEN Long,ZHANG Benjian,LI Yong,ZHONG Jiayi,WANG Yunlong,PENG Hanlin,ZHANG Xihua,YAN Wei,DING Yi,CHEN Xiao

Fig. 2. Lithologic features of the Dengying Formation in the Deyang-Anyue “trough basin”. (a) Jinfeng profile, Deng 2 Member, laminated micritic limestone (-); (b) Jinfeng profile, Deng 4 Member, thin-bedded micritic dolomite; (c) Lin’ansi profile, Deng 2 Member, laminated micritic limestone and silt-bearing dolomite (-); (d) Lin’ansi profile, Deng 4 Member, siliceous dolomite, slump structure; (e) Well ZY1, 5269.65 m, Deng 2 Member, psammitic dolomite (-); (f) Well ZY1, 5286 m, Deng 2 Member, crystal powder dolomite (-); (g) Well GS131, 5460 m, Deng 4 Member, algal stromatolithic dolomite (-); (h) Well TT1, 6347 m, Deng 4 Member, algal psammitic dolomite; (i) Well N2, 1907 m, Deng 2 Member, micritic dolomite (-).