东秦岭—大别造山带两侧盆地深部过程及古生界油气前景——以川东北盆地和合肥盆地为例

THE DEEP PROCESS AND PALEOZOIC PETROLEUM PROSPECT OF THE BASINS BY THE SIDE OF QINLING-DABIE OROGENIC BELT

范小林 陈浙春

Fan Xiaolin Chen Zhechun

中国石化石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214151

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214151, China

运用东秦岭—大别造山带深部地球物理测深成果资料,简述了岩石圈的深部地质结构与构造特征,讨论了岩石圈大地构造对与造山带有关的不同类型盆地深部过程的控制作用,以及岩石圈介质的构造成层和构造-热结构对盆地形成的控制作用,认为涉及这一地区的盆地深部过程及古生界油气前景的关键是:岩石圈具侧向分块、垂向解耦特征;盆地相对造山带而言,软流圈浅埋和"薄幔薄壳";盆地深部过程以岩石圈塑性形变和大陆深俯冲-构造解耦为主;深部热流上涌对古生界油气生运聚起一定的控制作用。

The deep geophysical survey information was applied to the description of the deep geologic structures and tectonic features of the lithosphere in East Qinling-Dabie orogenic belt.Researches show that the lithospheric tectonics control the deep processes of different basins related to orogenic belts and the tectono-stratification of lithospheric media and tectono-thermal events are in control of basining.The main characteristics of the relationship between lithosphere structure and petroleum prospect within this area are the lithosphere being laterally blocked and vertically decoupled,the asthenosphere mantle upwelling and thin layer crust,the deep processes with plastic deformation of the lithosphere and continent deeply underthrusting and tectonic decoupled as well as the deep thermal fluids upwelling to control the forming and migrating of the Paleozoic petroleum.

中国石化股份有限公司科技开发项目(P02071)。

https://doi.org/10.11781/sysydz200504338