摘要
背冲断块构造是指两条或两条以上空间上相邻的相向倾斜的逆冲断裂系及其间所夹的块体.塔北区有六条主要背冲断块构造带,由于其基底构造特征、岩石学性质及应力场演化等因素的差异,在各种背冲断块构造不同部位发育着不同类型的油气藏,故该构造带具有广阔的找油前景.
Back thrust block structures reffered to two or more serieses of back thrust faults with opposite inclination in space and in-between blocks, which were dominant in the deformational forms in the vast area of northern part of Tarim basin. Six major structural belts of back thrust blocks were determined in the area, which, according to the structural features of the basement, properties of petrology and the evolution of stress field, can be divided into four types, i.e, compressed back, basal control, strike-slip fracture control and faulted fold thrusts. Compressional environment used to dominate over the tectonics of the area, resulted in back thrust to anti-thrust, with mountain range and rising belt being held between the former, while basin and depressing area being placed in the latter. Major sourced depressions were controlled by anti-thrust, and the rises of back thrust block were favourable for hydrocarbon accumulation. With the basis of tectonic and sedimentary evolutions of Tarim basin, the author considered that eight types of hydrocarbon pools may exist, thus the area is of petroleum prospects.
出处
《石油实验地质》
CAS
CSCD
北大核心
1989年第4期320-330,共11页
Petroleum Geology & Experiment
