摘要
本文从一定地质时期内不同地块的活动和不同断裂的发育应在一个统一的应力系统下形成有序、配套的组合关系，它们的形成演化控制了该地区构造格局的观点出发，在南海西南部发现存在一个大型人字形走滑断裂系，由于曾母地块和南沙地块先后南移与西婆罗洲地块及其边缘增生带相碰撞，此人字形走滑断裂体系为一右旋体系。在人字形断裂间所挟持的曾母地块在渐新世－中新世时曾发生从向西南俯冲到向东南俯冲的逆时针旋转。
Based on the viewpoint that the formation and evolution of massifs and faults in a given region must be controlled by a unified stress field, the author firstly discovered a giant -type dextral strike-slip fracture zone at the southwestern South China Sea which is formed in the southward movement of Zengmu and Nansha Massifs and then collided with the Borneo Massif and its bordering accretion zone. The griped Zengmu Massif in-between the 人-type fracture zone, i.e. between the Wan'an-Lupal and Tingjia-Lizhun fanlts, once subducted south- west ward in Oligocene-early Miocene and later subducted southeastward in middle-late Miocene resulted in the anticlock-wise rotation, inevitably, a brush-type structure formed with a series of teno-shear faults stood by the west side of the massif is presented in sight. This tec- tonic frame is insignificant in explaining the high heat flow value, the high contents of CO_2 in the natural gas produced along the fracture zone, and in recognizing the oil-gas distribution regularity of the Zengmu Basin
出处
《南海地质研究》
1997年第9期54-66,共13页
Gresearch of Eological South China Sea
关键词
走滑断裂系
油气分布规律
南海
曾母盆地
人-type strike-slip fracture zone, Zengma basin, petroleum distribution regularity, South Clina Sea
