中国东部下第三系构造演化与源岩发育关系

Relationship between Palaeogene tectonic evolvement and development of source rock in the east of China

对我国东部下第三系源岩发育的壳幔背景及空间展布、源岩发育的构造背景、沉积和盆地环境、有机质赋存状态、有机质丰度、类型及地温场特征等方面的研究表明,秦岭-大别和郯庐断裂的生成演化是区内下第三系盆地发育的主要构造控制因素,渤海湾北东向裂谷型盆地规模大、切割深,有效烃源岩最为发育;南华北近东西向-北西西向断陷型盆地规模小、切割浅,有效烃源岩相对最不发育;而立交桥型的南襄盆地有效烃源岩发育程度介于两者之间。

The crust-mantle background and space distribution of palaeogene source rock in the east of China,the tectonic back ground,sediment and basin environment,state of organic matter,abundance of organic matter and type of organic matter in source rocks and geothermal field characters are analyzed,The generation and evolvement of the Qinling-Dabie Orogen and Tanlu Faults are the primary factors for controlling the tectonic development of the palaeogene basins,The effective source rock is enriched in the norh-east rift basin of Bohai Bay because of its large scale and deep cut,The effective source rock in the southern North China near EW-NWW trend faulted basin is the poorest because of its small scale and shallow cut,The eveloping degree of the effective source rock in Nanxiang Basin with cloverleaf junction lies in medium of the above basins.