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不少人认为,从中生代地壳运动开始,中国大地构造东西部开始分野,东部明显转入块断活动。殊不知西部也同样如此。所不同者,东部块断活动多在拉张作用力下进行,比较明显单一;西部块断活动,则在压性、压扭性及局部张性作用力下进行,表现形式复杂多样。与油气关系,东西部亦不尽相同。本文试图以新疆境内几个主要沉积盆地为例,来浅探一下基岩断裂、断块对沉积盆地的形成、盆地内次一级构造的成因及油气生成与运聚的作用(即断块成油)。
Many people think that from the beginning of the Mesozoic crustal movement, China started to separate the eastern and western parts of the earth’s structure and the eastern part of the earth moved to block-breaking activities. As everyone knows, the same is true in the West. The difference is that in the eastern block, the activities are mostly carried out under the tensile force, which is obviously single; while the broken block in the western part is under the compressive, compressive and torsional forces as well as the local tensional forces, and the forms are complex and diverse. Relationship with oil and gas, east and west are not the same. This article attempts to take several major sedimentary basins in Xinjiang as an example to explore the fracture of bedrock, the formation of sedimentary basins in the fault blocks, the genesis of the secondary primary structures in the basin and the role of hydrocarbon generation and migration ).