Gravity Inversion and Thermal Modeling about the Crust-Mantle Structure of Southwest Basin in the South China Sea
详细信息
- 责任者：Zhang Jian (Key Laboratory of Computational Geodynamics ; Graduate University ; Chinese Academy of Sciences ; Beijing 100049 ; China) ; Li Jiabiao
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54(12)
- 关键词：地壳结构 ; crustal structure ; 地幔 ; mantle ; 重力场 ; gravity field ; 热模拟 ; thermal simulation ; 南海 ; South China Sea
- 页码：p.3026-3037
- 图表：6 illus., 2 tables, 29 refs.
- 分类号：0400
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The crust-mantle structure and magmatic activity is one of the key problems to study the formation and evolution of Southwest sub-basin of South China Sea. According to gravity data supplied by the NH973-1 profile, the authors get the density model of crust-mantle construction with gravity inversion method. And then, the authors learn the temperature structure and thermal evolution consequence after sea-floor spreading. Gravity inversion indicated that there is a deeper sunken sedimentation area and a depressed Moho surface region under the SW sub-basin center. Thermal modeling shows that temperature variation is not a consistent degradation between crust and mantle, but in the way of crust warming with mantle cooling.