合肥盆地演化及构造样式

合肥盆地位于华北地台、扬子地台和北淮扬褶皱带3大构造单元的结合部。由于受大别造山带和郯庐断裂长期活动的影响,总体上可以分为盆地基底形成阶段和盆地形成发展阶段,主要经历了印支期、燕山晚期、喜山晚期的冲断作用及燕山早期、喜山早期的伸展运动,形成了挤压构造、伸展构造、负反转构造和走滑构造等4种局部构造样式。现今的构造样式是上述5期构造运动叠加的结果。对合肥盆地构造特征进行系统研究,将为进行圈闭评价以及今后的钻探提供有利依据。 

STRUCTURAL STYLES AND EVOLUTION IN THE HEFEI BASIN

The Hefei Basin is located in the connection of the North China Platform, the Yangtze Paraplatform and the North Huaiyang Fold Belt, and was long influenced by the Dabie Orogenic Belt and the Tanlu Fault. The structural evolution can be divided into two stages including the formation of basinal basement and the development of the basin. The basin mainly underwent the thrusts during the Indosinian, Late Yanshanian and Early Himalayan movements, and two extensional movements were developed during the Early Yanshanian and Early Himalayan activities. Four structural styles, i.e., compression structure, extensional structure, negative inversion structure and strike-slip faults, were developed as a result of the tectonic movements mentioned above. A systematic study on the structures of the basin will provide information for petroleum exploration in the basin.