继承性构造和新生构造并存发育的时空规律——兼论新生构造的油气勘探意义

继承性构造与新生构造并存有复杂的时空发育特征。分5种情况剖析了中国东部晚中生代—新生代盆地和扬子、塔里木、鄂尔多斯三大克拉通陆表海盆地继承性构造与新生构造并存的大量实例并总结了其时空发育规律。新生构造的发育主要受邻侧造山带演化的控制,还可能受基底构造或先存构造形成的边界条件的约束,故继承性构造与新生构造并存发育的研究思路应是"寻根溯源"。新生构造的油气勘探意义,集中表现在控制(生油-)储油层、输导体系和构造圈闭的发育。据此分析了今后东部陆相盆地和海相地层的油气勘探靶区。

Time-spatial developing laws of co-existed inherited and neogenic structures: with reference to significance of neogenic structures for oil-gas exploration

Co-existed inherited and neogenic structures might have some complicated spatial-time developing features. Based on analyses of typical cases from the Late Mesozoic-Cenozoic basins in East China and epicontinental sea basins of the Yangtze, Tarim and Ordos Cratons, five situations were distinguished respectively, and some time-spatial developing laws were discussed. The development of neogenic structure was mainly controlled by the neighboring orogen evolution, as well as constrained by boundary conditions created by the basement or pre-existed structures. So the approaches for the study on co-existed inherited and neogenic structures should be to 'get to the root' and 'trace to the source'. The significances of neogenic structures for oil-gas exploration might be that it has controlled the development of (source-) accumulation beds, migration systems and structural traps. Based on what mentioned-above, the targets for oil-gas exploration in the eastern continental basins and in the marine strata in near future were analyzed respectively.