【作者】 詹文欢； 丘学林； 孙宗勋； 朱俊江； 孙龙涛； 姚衍桃；

【Author】 ZHAN Wen-huan QIU Xue-lin SUN Zong-xun ZHU Jun-jiang SUN Long-tao, YAO Yan-tao (Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology & Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510301, China)

【机构】 中国科学院南海海洋研究所与广州地球化学研究所边缘海地质重点实验室；

【摘要】 南海西北部红河断裂带是一条走滑的活动断裂带,它控制着该区的构造活动,也控制着莺歌海油气盆地的形成和演化。根据南海西北部中穿过莺歌海盆地的地震剖面和历史资料进行解释,结果表明莺歌海油气盆地的形成可分三个阶段:自50MaB．P．开始,沿红河断裂带的左旋错动和在印支地块的顺时针旋转的应力作用下,形成了莺歌海油气盆地的雏形;24MaB．P．之后在左旋压扭应力场作用下,形成了盆地西北部的反转构造;5MaB．P．之后发生了右旋错动,盆地内快速沉降,发育巨厚沉积层,此阶段为莺歌海盆地油气资源的聚集奠定了基础。更多还原

【Abstract】 The Red River Fault Zone is a large slide and active fault zone. It controls the tectonic activities of the northwestern South China Sea and also controls the form and evolution of the Yinggehai basin. This paper based on the seismic profiles through the Yinggehai basin and history data and as a result indicates three evolutional stages of the Yinggehai basin: from the beginning of 50Ma B. P., with the stress function of the sinistral rotation slide along the Red River Fault Zone and the clockwise rotation of Indochina massif, formed the rudiment of the Yinggehai basin. After 24Ma B. P., with the stress field of the sinistral rotation and compressive shearing, formed the reverse structure in the northwestern basin. After 5Ma B. P., because of dextral rotation slip and quickly subsiding of basin, formed the huge-thick sediment layer. Based on the distance of the sediment center between the oldest and the youngest sediment layer, conclude the sinistral rotation slip about 200km along the Red River Fault Zone. Up to the modern times the fault zone’s activity becomes weakness.更多还原