机构地区: 中国科学院广州地球化学研究所
出 处: 《地质学报》 2004年第3期302-309,共8页
摘 要: 莺歌海盆地位于南海西北部 ,属 NW走向红河断裂带向南海海域的延伸。本文通过对盆地结构、沉降特征和构造 -沉积迁移过程的研究 ,提出莺歌海盆地在始新世—早渐新世期间属左旋扭张性断陷盆地 ,晚渐新世—早中新世的盆地演化阶段受到红河断裂带的左行剪切运动影响。 Yinggehai basin locates at the northwest of the South China Sea, it is the seaward elongation of the NW-trending Red River Fault Zone. Through research in basin structures, subsidence and tectonic-sedimentary migration process, we proposed that the Yinggehai basin is a sinistral transtensional rifting basin from Eocene to early Oligocene. From late Oligocene to early Miocene, affected by the sinistral shear movement of the Red River Fault Zone, the left-lateral slip distance of the Yinggehai basin is about 53±2 km. The forming and evolving history of the Yinggehai basin reflect the influence history of India-Tibet collision to the evolution of the South China Sea.