| 鄂尔多斯盆地西缘逆冲带南北差异的形成机制 |
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| 引用本文： | 张进,马宗晋,任文军.鄂尔多斯盆地西缘逆冲带南北差异的形成机制[J].大地构造与成矿学,2000,24(2):124-133. |
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| 作者姓名： | 张进 马宗晋 任文军 |
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| 作者单位： | 1. 中国地震局地质研究所,北京,100029
2. 南京大学地球科学系,江苏,南京,210093 |
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| 基金项目： | 国家自然科学基金;49834020; |
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| 摘 要： | 鄂尔多斯盆地西缘逆冲带是我国重要的陆内逆冲推覆构造带 ,其形成与发展 ,对了解我国西部与东部之间的构造转换 ,有着重要的意义 ,同时也是研究青藏高原向东扩展的有利地区。通过对该构造带几个问题的讨论 ,认为该构造带南段与北段的形成机理是不同的 ,鄂尔多斯盆地在当时有一定程度的逆时针旋转。南段主要是祁连山—北秦岭造山带向北东方向挤压的结果 ,贺兰山南部的北西向构造也属于该段 ,因此其形状为一向北东突出的弧形 ;而北段是由于旋转的盆地与发生构造挤出的阿拉善块体相互作用的结果。并对一些问题提出了一些看法
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| 关 键 词： | 鄂尔多斯盆地 逆冲推覆构造 祁连山—北秦岭造山带 旋转 阿拉善地块 |
THE MECHANISM OF THE DIFFERENCE BETWEEN THE NORTHERN PART AND THE SOUTHERN PART OF THE FOLD AND THRUST BELT ON THE WESTERN EDGE OF THE ORDOS BASIN, CHINA |
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| Abstract: | The western fold and thrust belt of the Ordos basin is an important intracontinental thrust belt in China.It is a transfer zone between the west tectonic domain and the east tectonic domain of China, and also a good region for studying the lateral extension of the Qinghai-Tibet plateau,So it is important to understand its development and history.By discussing several questions about this belt and some areas near it,we make a hypothesis that it was the rotation in that time that led to the development of the belt.The belt can be divided into two parts by the Jintaquan-Balunbieli fault.It was the northeastern compression of the Qilian Mountain-Northern Qinling Orogen that led to the formation of the southern part of the belt, whereas the formation of the northern part of the belt was due to the rotation of the Ordos basin and the eastward extrusion of the Alshan Block. So the mechanism of the two parts was different.And we bring forward some views about several other questions. |
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| Keywords: | Ordos basin thrust tectonics Qilian Mountain-Northern Qinling Orogen Yinchuan Graben Alshan Block rotation |
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