| 准噶尔盆地古生代末大地构造动力学数值模拟 |
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| 引用本文： | 王延欣,侯贵廷,刘世良,李乐,牛晓露,肖芳锋.准噶尔盆地古生代末大地构造动力学数值模拟[J].地球物理学报,2011,54(2):441-448. |
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| 作者姓名： | 王延欣 侯贵廷 刘世良 李乐 牛晓露 肖芳锋 |
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| 作者单位： | 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. 中国石化集团新星石油有限责任公司,北京 100083 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目 |
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| 摘 要： | 大地构造动力学数值模拟是构造物理研究的重要方向.本文利用有限元数值模拟方法研究准噶尔盆地古生代末的构造应力场.根据准噶尔盆地西部岩墙群和准噶尔盆地内部及周边地区应力标志,确定了晚二叠世准噶尔地区最大主应力方向为NW-SE向,方位在295°左右,局部地区略有偏转.以实测古构造应力场为拟合标志,对Seng(o)r和Alle...
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| 关 键 词： | 二叠纪末 构造应力场 中亚造山带 准噶尔盆地 张扭性和压扭性机制 |
| 收稿时间： | 2010-06-29 |
Numerical simulation of tectonic dynamics of the Junggar basin at the end of Paleozoic |
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| WANG Yan-Xin,HOU Gui-Ting,LIU Shi-Liang,LI Le,NIU Xiao-Lu,XIAO Fang-Feng.Numerical simulation of tectonic dynamics of the Junggar basin at the end of Paleozoic[J].Chinese Journal of Geophysics,2011,54(2):441-448. |
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| Authors: | WANG Yan-Xin HOU Gui-Ting LIU Shi-Liang LI Le NIU Xiao-Lu XIAO Fang-Feng |
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| Institution: | 1. Key Laboratory of Orogenic Belts and Crustal Evolution; School of Earth and Space Sciences, Peking University, Beijing 100871, China;
2. SINOPEC Star Petroleum Co., Ltd., Beijing 100083, China |
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| Abstract: | Numerical simulation of tectonic dynamics is an important research issue of tectonophysics. Using the finite element numerical simulation method, the paleostress field of the Junggar Basin at the end of Paleozoic was studied in this paper. On the basis of the study of dike swarms in the west of the basin and systematical analysis of other stress indicators in the basin and adjacent area, we acquire that the major direction of the principal stress in the study area in the late Permian is NW-SE (dominant strike is 295°), with local direction deflects a little. With the observed palaeotectonic stress field as the criteria, a series of numerical simulations have been done based on the tectonic models proposed by S,engr and Allen, aiming to provide constraints on the geodynamical mechanisms for the study area at the end of Paleozoic.The results indicate that the Junggar basin might form under the composite effect of tenso-shear and compresso-shear mechanisms. The Ertix fault on the northern margin of the basin and the north Tianshan fault on the southern margin are both tenso-shear sinistral strike-slip faults, while the Darabut fault on the western margin and the Bogda piedmont fault on the eastern margin are more likely compresso-shear dextral strike-slip faults, which played important role in the formation of the palaeotectonic stress field of the Junggar basin in late Permian. |
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| Keywords: | The end of Permian Tectonic stress field Central Asian Orogenic Belt Junggar basin Tenso-shear and compresso-shear mechanisms |
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