Muglad盆地形成力学机制的有限元数值模拟

北京大学学报（自然科学版）

Muglad盆地形成力学机制的有限元数值模拟

张庆莲^1,2,侯贵廷¹,潘校华²,万伦坤²,刘计国²

1. 教育部造山带与地壳演化重点实验室, 北京大学地球与空间科学学院, 北京 100871; 2. 中国石油勘探开发研究院, 北京 100083;

收稿日期:2012-11-16 出版日期:2013-11-20 发布日期:2013-11-20

Mechanics of Muglad Basin in Central Africa Rift Systems: A Paleostress Field Modeling

ZHANG Qinglian^1,2, HOU Guiting¹, PAN Xiaohua², WAN Lunkun², LIU Jiguo²

1. The Key Laboratory of Orogenic Belts and Crustal Evolution MOE, School of Earth and Space Sciences, Peking University, Beijing 100871; 2. PetroChina Exploration and Development Research Institute, Beijing 100083;

Received:2012-11-16 Online:2013-11-20 Published:2013-11-20

摘要/Abstract

摘要： 以早白垩世Muglad盆地的地质背景为基础, 运用弹性力学有限元数值模拟方法, 通过对应力场的分析, 为盆地形成的力学机制提供依据。模拟结果表明, Muglad盆地是受走滑作用和拉张作用共同影响形成的被动裂谷盆地, 指示Muglad盆地是在中生代泛大陆裂解的大背景下, 在非洲大陆的走滑作用和拉张作用的共同作用下形成和发育的, 而不是简单地由走滑作用诱导形成。

关键词: Muglad盆地, 中西非裂谷系, 中非剪切带, 有限元数值模拟, 力学机制

Abstract: Based on the geological setting of Muglad Basin during the Early Cretaceous, using linear elastic theory with two dimensional finite element modeling, through the analysis of the stress field, the result of stress field modeling offered a reliable evidence to the mechanics of Muglad Basin. The modeling results suggest that Muglad Basin is a passive rift basin that developed under the joint influence of strike slipping and tension force. This viewpoint reveals that strike-slipping and extensional process coexisted in African Continent during the Early Ceta- ceous. Muglad Basin is formed and developed under the joint influence rather than simply of the strike slipping.

Key words: Muglad Basin, West and Central African rift systems, Central African shear zone, finite element modeling, mechanics

中图分类号:

P553

张庆莲,侯贵廷,潘校华,万伦坤,刘计国. Muglad盆地形成力学机制的有限元数值模拟[J]. 北京大学学报（自然科学版）.

ZHANG Qinglian,HOU Guiting,PAN Xiaohua,WAN Lunkun,LIU Jiguo. Mechanics of Muglad Basin in Central Africa Rift Systems: A Paleostress Field Modeling[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y2013/V49/I6/981

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