Forward and Inverse Modeling of Anomalous Post-Rifting Subsidence in Extensional Sedimentary Basins
详细信息
- 责任者：Zhou Di (CAS Key Laboratory of Marginal Sea Geology ; South China Sea Institute of Oceanology ; Chinese Academy of Sciences ; Guangzhou 510301 ; China) ; Liao Jie
- 刊名：Earth Science
- 出版年：2011
- 卷期：36(2)
- 关键词：沉降速率 ; settlement velocity ; 张性断层 ; tension faults ; 沉积盆地 ; sedimentary basins ; 珠江口盆地 ; Zhujiangkou Basin
- 页码：p.227-235
- 图表：8 illus., 23 refs.
- 分类号：0300
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
This paper introduces three methods for characterizing anomalous post-rifting subsidence, namely, the paleo-water depth comparison, the strain-rate inversion, and the 2D forward-backward modeling. The conditions, advantages and disadvantages of these methods are discussed.The application of the third method, which is proposed by the authors, in the Pearl River Mouth basin of the northern South China Sea is presented. Taking into account the lithospheric flexural rigidity, the method calculates the lithosphere stretch factor and theoretical thermal subsidence through 2D forward modeling, and then compares the theoretic subsidence with the observed one given by 2D backstripping. Necessary improvements of the method are also discussed.