| 阿拉善断块层间滑动断裂和推覆构造 |
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| 引用本文： | 杨振德,潘行适,杨易福,李发洲.阿拉善断块层间滑动断裂和推覆构造[J].地质科学,1986,0(3):201-210. |
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| 作者姓名： | 杨振德 潘行适 杨易福 李发洲 |
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| 作者单位： | 1. 中国科学院地质研究所;2. 宁夏回族自治区地质矿产局研究队 |
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| 摘 要： | 1982—1983年,作者对阿拉善断块进行了地质调查和研究。本文是在二年调查和研究的基础上,对断裂构造所提出的部分认识。阿拉善断块位于中国北部鄂尔多斯断块和塔里木断块之间,大部属于内蒙古自治区和阿拉善盟所辖。东界为贺兰山西麓的亚洲中部经向断裂带,北界在德斯特乌拉和阿尔格林台一线,西南界为河西走廊北部的 NW 向断裂带。阿拉善断块上出露的最老地层为太古代的阿拉善群，由超镁铁质岩、基性火山岩和沉积碎屑岩组成。
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| 关 键 词： | , |
| 收稿时间： | 1984-05-01 |
| 修稿时间： | 1984-05-01; |
THE INTERLAYER-GLIDING FAULT AND THE NAPPE STRUCTURE IN THE ALASHAN FAULT-BLOCK |
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| Yang Zhende,Pan Xingshi,Yang Yifu,Li Pazhou.THE INTERLAYER-GLIDING FAULT AND THE NAPPE STRUCTURE IN THE ALASHAN FAULT-BLOCK[J].Chinese Journal of Geology,1986,0(3):201-210. |
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| Authors: | Yang Zhende Pan Xingshi Yang Yifu Li Pazhou |
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| Institution: | 1. Institute of Geology, Academia Sinica, Beijing;2. The Research Team of Geological Bureau of the Ningxia Hui Autonomous Region |
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| Abstract: | The Alashan fault-block is located between Shanxi-Shaanxi fault-block and Tarim fault-block in the northern part of China. In this region, the interlayer-gliding fault and the nappe structure are well developed.The interlayer-gliding fault includes brittle interlayer-gliding fault, brittle-plastic interlayer-gliding fault and plastic interlayer-gliding fault. Spanning from the west to the east they appear successively with increasing degrees of uplift and erosion depth on the Alashan fault-block. These three types of faults being different in nature are closely related. The brittle interlayer-gliding fault is brittle rupture occurred in the upper part of the earth’s crust (<10km). The brittle-plastic interlayer-gliding fault, formed in the deeper part 10-15km), and characterized by the plastic-flowing of the layer’s interior. Striped roeklayers (consists of different mineral) may flow when temperature and pressure increase downward with depth. The brittle-plastic interlayer-gliding fault is a transition type between the brittle interlayer-gliding fault and plastic interlayer-gliding fault. The plastic interlayer-gliding fault occurred in the deeper part of the crust (>15km). Under long-continued conditions of high temperature and ning pressure the plastic flowing occurred.The nappe structure, combinated nappe with interlayer-gliding fault, is gliding structure systems. The thrust-nappe structure and normal fault-nappe structure discovered in Alashan are two basic types of nappe structure. The interlayer-gliding fault produced the interlayer-gliding melanges. They have influence on geohistorical analysis on the formation and resuming of metamorphic rocks. The nappe structure in Alashan fault-block mainly occurred during three periods of time:1) Period from Middle Proterozoie to the end of Palaeozoic, nappe structure occurred in the deep part of the crust. The direction of the movement was form west to east..2) Period from the end of Permian to early Jurassic. The layer glided from south to north. It is one of the large scale nappe structure movements responsible for the present geomorphic and structure features of the Alashan fault-block.3) The layer glided from south to north during the end of Triassie. |
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