Dynamic Mechanism of Anomalous Post-Rift Subsidence in the Yinggehai Basin

• 责任者：Cui Tao (Faculty of Earth Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Xie Xinong
• 刊名：Earth Science
• 出版年：2008
• 卷期：33(3)
• 关键词：沉降 ; subsidence ; 莺歌海盆地 ; Yinggehai Basin
• 页码：p.349-356
• 图表：4 illus., 34 refs.
• 分类号：0300
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

The Yinggehai Basin, the backstripping and strain rate inversion methods are used to study the stratigraphic sections and boreholes by analyzing the relevant data. The results show a discrepancy between observed post-rift subsidence and theoretically predicted post-rift subsidence based on a multiple rift model. The modeling results of two seismic sections show clearly that the anomalous subsidence during the post-rift stage in the northwestern part of the basin, between 300 m and 500 m, is much less than that in the middle and southeastern parts, which ranges from 900 to 1 200 m. The authors compare these results with those of time-dependent dynamic topography subsidence based on the global mantle flow model.