Temporal and Spatial Distribution of Tectonic Subsidence and Discussion on Formation Mechanism of Anomalous Post-Rift Tectonic Subsidence in the Qiongdongnan Basin
详细信息
- 责任者：Li Yamin (Key Laboratory of Marginal Sea Geology ; CAS ; South China Sea Institute of Oceanology ; Chinese Academy of Science ; Guangzhou 510301 ; China) ; Shi Xiaobin
- 刊名：Journal of Jilin University
- 出版年：2012
- 卷期：42(1)
- 关键词：沉降 ; subsidence ; 构造环境 ; tectonic setting ; 琼东南盆地 ; Qiongdongnan Basin
- 页码：p.47-57，65
- 图表：5 illus., 2 tables, 38 refs.
- 分类号：0300
- 出版序号：20130028
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
To investigate the temporal and spatial distribution of tectonic subsidence and the formation mechanism of anomalous post-rift tectonic subsidence in the Qiongdongnan Basin, the authors calculated the tectonic subsidence history of sixty-eight wells by back stripping method. Then fifteen representative wells were chosen to estimate stretching strain rate using inverse theory and to calculate stretching factors.The results suggest that the extent of tectonic subsidence in the center and southern depressions is greater than that in northern depression. The results suggest that the quick subsidence in the early post-rift stage likely resulted from the diversity of stretching during the rift period,and the quick tectonic subsidence since Later Miocene was likely caused by magmatic activities.
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