| 华北克拉通中元古代基性岩墙群形成机制及构造应力场 |
| |
| 引用本文： | 侯贵廷,张宝兴.华北克拉通中元古代基性岩墙群形成机制及构造应力场[J].地质论评,1998,44(3):309-314. |
| |
| 作者姓名： | 侯贵廷 张宝兴 |
| |
| 作者单位： | [1]北京大学地质学系 [2]多伦多大学地球科学系 |
| |
| 摘 要： | 本文通过研究华北克拉通中部中元古代基性岩墙群的单体形态和分布规律，分析岩墙群形成的力学机制，认为这些基性岩墙群主要是基性岩浆侵位于先存的张性或张剪性破裂中而成。晋北地区和五台－太行山地区的岩墙群主要为张剪性的，吕梁山地区和中条山地区的主要为张性。根据岩墙群的分布规律、侵位方向和力学机制及其与燕辽－中条拗拉槽系之间的关系，认为华北克拉通中部中元古代的区域构造应力场是张性和张剪性构造环境，其主压应力来
|
| 关 键 词： | 华北克拉通 基性岩墙群 构造应力场 中元古代 |
The Formation Mechanism and Tectonic Stress Field of the Mesoproterozoic Mafic Dike Swarms in the North China Craton |
| |
| Hou Guiting,Zhang Chen,Qian Xianglin.The Formation Mechanism and Tectonic Stress Field of the Mesoproterozoic Mafic Dike Swarms in the North China Craton[J].Geological Review,1998,44(3):309-314. |
| |
| Authors: | Hou Guiting Zhang Chen Qian Xianglin |
| |
| Abstract: | The mechanism for the formation of Mesoproterozoic mafic dike swarms in the central part of the North China Craton has been studied according to an analysis of the shapes and distribution characteristics of these dike swarms. The authors hold that they were mainly formed by emplacement of mafic magma into the earlier extensional or shear-extensional fractures. Most dike swarms in the northern Shanxi and Wutai-Taihang areas are shear-extensional, while most dike swarrns in the Luliang and Zhongtiao areas are extensional. According to the distribution, emplacement, mechanism and relation with the Yanliao - Zhongtiao aulacogen system, the Mesoproterozoic tectonic stress field in the central part of the North China Craton was extensional and shear-extensional, in which the principal compress stress probably stemed from the extension of the Yanliao-Zhongtiao aulacogen system. The existence of the undeformed and unmetamorphed Precambrian dike swarms shows that the Precambrian North China Craton had been a rigid plate. |
| |
| Keywords: | North China Craton mafic dike swarms mechanic character tectonic stress field Yanliao-Zhongtiao aulacogen system |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《地质论评》浏览原始摘要信息 |
| 点击此处可从《地质论评》下载免费的PDF全文 |
