摘要
根据目前掌握的资料，我们将中亚与中国西北地区的含油气盆地分为４种成因类型：即拉分或裂谷型张裂盆地，构造样式呈现为复式地堑；陷落型前陆盆地，构造样式为（正或负）反转构造，早期因克拉通地块向造山带前缘下俯冲，导致后者上部地壳重力陷落形成半地堑，晚期由于造山带向外扩展使盆地前期构造发生反转；岩石圈块断型克拉通盆地，构造样式为继承性明显的重叠构造；叠加型复合盆地，盆地发育的各个时期受不同方向应力场控制，无论是变形或沉积。
Bused on available informution, four genetic types of oil and gas bearing basins with different structural styles in central Asia and northwestern China have been figured out, i.e. 1) Pull apart or rift type of extension basins, which have multiple graben with gradually decreased subsiding from two sides to the center in the structural style. 2)Gravitational depression type of foreland basins with (normal or negative) reversing structural style. These basins are all semi grabens formed by gravitational depression of the upper crust resulting from the subduction of cratonic massif to the front margin of orogenic belt in the early stage and huppen to reverse due to the outward expansion and extension of the orogenic belt in the late stage. 3)Lithosphere block type of craton basins, which have overlapping structural style with obrious inheritance tectonically. These basins are all based on the rigid old craton, and their earlier structural pattern of lithosphere block have not been changed at all due to the lower geothermal gradient and slight tectonic uctivity in the later stage. 4)Structure stacking type of composite basins controlled by different direction of structural stress field in the different stages of basin development. As a result, whether their deformation or sediments have different tectonic direction and characters.
基金
中国石油天然气总公司资助
关键词
油气藏
盆地
含油气盆地
类型
成因分析
central Asia northwestern China basin structure type basin genetic classification
