摘要
湘中地区经历了四次大的造山作用,其中以印支期造山运动期后的拉伸作用表现得尤为明显。主要表现在山地和盆地交接地带的倾滑断裂先压后张、先逆向后正向的滑动。以及边缘上叠盆地的层滑拉仲枸造等。显示出沿同一滑脱而先推覆后滑覆、挤压和拉伸在同一运动系统中叠次出现的复杂结构现象。这种断裂构造力学性质的转化归因于区域性,调节性和局部性构造应力场的变更。
The central Hunan area has undergone four orogeny ecycles of broad scope since the protereozoic Era, i.e. Xuefongian, Caledonian, Indosinian and Yanshanian orogeny cycle. The tensile action after the Indosinian cycle is especlally obvious. This mechjanical trans-formation of the dip-slip fault from compressive to tensile and from inverse to normal slid-ing as well as the layer-slip extensinal tectonics of the superimposed basin in Lianyuan have been now well recognized in the connection zone betwen the mountains and basins. Specifically they occur in some complex structural phenomena which indicate the fore-nappes, the after-glidings, and the comperssion-extension in the same moving system. The transformation of the mechanical nature of the dip-slip fault may be attri-buted to the changes of the regional, adjustable, and local structral stress fields.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1990年第4期711-719,共9页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金
南京大学石油与天然气研究中资助
关键词
造山运动
拉伸作用
倾滑断裂
orogeny
tenslie action
dip-slip fault
structural stress field
extensional tectonics
