• 责任者：Ding Weiwei (Key Laboratory of the Submarine Geoscience ; State Oceanic Administration ; Hangzhou 310012 ; China) ; Li Mingbi
• 刊名：Earth Science Frontiers
• 出版年：2009
• 卷期：16(4)
• 关键词：构造模式 ; structural models ; 伸展构造 ; extension tectonics ; 南海 ; South China Sea
• 页码：p.147-156
• 图表：7 illus., 1 table, 36 refs.
• 分类号：0300
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Based on the interpretations of these profiles and combined with structural geology, the authors discussed the Cenozoic tectono-sedimentary characteristics and extension model of this sub-basin. The results show that the Northwest Sub-basin began its sea-floor spreading since 30 Ma. The extension activities mostly happened during the Oligocene. The rifts distributed symmetrically around the spreading center, which is occupied by igneous body now. Sediments in this period are characterized by chaotic and discontinuous reflectors, indicating rift-filling clastic sediments.