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《Journal of Stratigraphy》 2005-01
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HOU Ming-cai, CHEN Hong-de,and TIAN Jing-chun ( State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Institute ofSedimentary Geology, Chengdu University of Technology, Chengdu, 610059 )  
Eastern Tethys Ocean unclosed along Jinshajiang-Ailao mountain suture zone in the Early Devonian, Guangnan-Jingxi basal fault arranged and evolved in synchronism with plate boundary fault-Jinshajiang-Ailao fault zone, with plate boundary fault aggravating, basal fault activity enhancing. It caused the Youjiang Basin evolved from continental rift basin to passive continental margin rift basin. According to tectonic activity intensity and basin filling feature, the Youjiang Basin evolution is divided into four phases:① from Lochkovian to Pragian,it was continental rift basin phase;② from Emsian to Eifelian, it was tensile developing phase;③ from Givetian to Frasnian,it was rift phase;④ until Famennian,it was tectonic dormancy phase; the latter 3 phases constitute passive continental margin rift basin phase. In each phase, tectonic sink and eustacy is different, so the sequence style is different, too. Isolated platform sequence was controlled mainly by relative sea-level and carbonate production, but basin among platforms was controlled mainly by tectonic, sea-level change, platform margin gravity current and sediment supply. According to above features, Devonian is divided into two Ⅱsequences and 18 Ⅲ sequences in the study area. At the same time, author builds the sequence-filling model of basin in different evolution phase. In short, the sequence filling difference is a response to basin tectonic evolution and global change of sea level.
【Fund】: 中石化重大科研项目“中国南方海相震旦系—中三叠统构造—层序岩相古地理研究及编图”成果之一;; 四川省重点学科“构造地质学”建设基金资助项目 (编号 :SZD0 40 8)
【CateGory Index】: P534.44
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