鲁西地区断裂构造类型及其形成机制

鲁西地区断裂构造发育，并且以新泰—泗水一带为中心呈放射状和同心环状展布，组成了同心环状—放射状断裂构造体系。这些断裂均表现为张扭性断裂，但也曾发生过压扭性活动。断裂的垂直断距为几十米至几千米不等，在研究区中部断裂断距较大，而在边部较小。这些断裂是在中新生代形成并进一步发展的。同心环状—放射状断裂构造体系是鲁西地块呈穹隆拱升形成的，而且在拱升的过程中还发生了逆时针和顺时针旋转。鲁西地块的拱升与旋扭皆与郯庐断裂的活动有关

DISTRIBUTION PATTERNS AND FORMATION MECHANISM OF FAULTS IN THE WEST SHANDONG PROVINCE

West Shandong terrain is bounded by the Tancheng\|Lujiang Fault in the east, by the Liaocheng\|Lankao Fault in the west, by Qihe\|Guangrao Fault in the north, by Kaifeng\|Tancheng Concealed Qinling Uplift Zone in the south. Faults of this area are well developed and arranged in the radial and concentric forms centring around the Xintai\|Sishui area. These faults composed a radial\|concentric structural system and occurred as tensile\|wrenching faults, and they also activated as compressive\|wrenching faults. Their throws range from several tens of meters to several thousands of meters and increase from the central part to marginal areas. These faults were generated and developed in the Mesozoic and Cenozoic. The radial\|concentric structural system resulted from doming\|up of the West Shandong terrain and also rotated anticlockwise or clockwise during doming\|up. Doming and rotating of the West Shandong terrain are closely related to the activities of the Tancheng\|Lujiang Fault.