同济大学学报（自然科学版）2012，Vol.40Issue(11)：1730-1736,7.DOI:10.3969/j.issn.0253-374x.2012.11.025
台西南盆地岩石圈伸展及裂后沉降特征分析
Analysis of Lithospheric Extension and Postrift Subsidence in Taixinan Basin
摘要
Abstract
The effective elastic thickness, different scales of extension factors and post-rift subsidence are important in reflecting characteristics of an extensional basin. 2D structural simulation softwares based on the flexure isostasy model and the flexural cantilever mode were employed to model the interpreted seismic profiles across Taixinan Basin. Results show that the appropriate effective elastic thickness value in Taixinan basin is 1. 5 km. The extension is characterized by the lateral heterogeneity and depth-dependence of lithospheric extension in Taixinan Basin, the extension factor changing between 1.2 and 4.8 in lithosphere, between 1. 2 and 2. 9 in the whole crust, and between 1.0 and 1.2 in the upper crust. Being different from subsidence characteristics of a classical extensional basin, the post-rift subsidence rate in Taixinan Basin is not of obvious regularity, which is mainly affected by the formation of slope and Dongsha tectonic movement.关键词
台西南盆地/岩石圈伸展/有效弹性厚度/不同尺度拉张因子/裂后沉降速率Key words
Taixinan Basin/lithospheric extension/the effective elastic thickness/different scales of extension factors/subsidence rate in post-rift分类
天文与地球科学引用本文复制引用
吴哲,杨风丽,钟家良,钟广见..台西南盆地岩石圈伸展及裂后沉降特征分析[J].同济大学学报（自然科学版）,2012,40(11):1730-1736,7.基金项目
国家"八六三"高技术研究发展计划(2006AA09A101-0202-1) （2006AA09A101-0202-1）
