| 塔藏构造混杂岩带特征 |
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| 引用本文： | 曹,俊,彭,东,郭建强,刘,旗.塔藏构造混杂岩带特征[J].中国地质,2002,29(4):387-391. |
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| 作者姓名： | 曹 俊 彭 东 郭建强 刘 旗 |
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| 作者单位： | 四川省地勘局区域地质调查队生态环境旅游资源调查所,四川,双流,610213 |
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| 摘 要： | 运用大陆造山带构造岩片填图方法，首次对九寨沟塔藏构造带进行了系统研究。认为塔藏构造带为-构造混杂岩带。其南北边界断裂清楚，北界为牙扎沟断裂，呈北西-南东向展布；南界为荷叶断裂，也呈北西-南东向展布，边界断裂内部为塔藏构造混杂岩带，呈北西-南东向延伸长16-24km，宽7-8km，由上古生界与三叠系的多个大小不同，形态各异的构造岩片（或岩块）混杂堆积组成，与塔藏岩组砂板岩呈断层接触，总体表现为块体之间无序，块内有序，微观变形特征清楚，三维有限应变测量显示为北东-南西向，近南北向两个方向压缩，结合测区构造地质环境分析有4期变形。
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| 关 键 词： | 变形特征 边界断裂 构造混杂岩带 塔藏构造带 晚古生代 |
| 文章编号： | 1000-3657(2002)04-0387-05 |
Characteristics of the Tazang tectonic mélange belt |
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| CAO Jun,PENG Dong,GUO Jian? Juan qiang,LIU Qi.Characteristics of the Tazang tectonic mélange belt[J].Chinese Geology,2002,29(4):387-391. |
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| Authors: | CAO Jun PENG Dong GUO Jian? Juan qiang LIU Qi |
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| Institution: | Institute of Ecological Environment & Tourism Resources Survey, Regional Geological Survey Party, Sichuan Bureau of Geology and Mineral Exploration and Development, Shuangliu 610213, Sichuan, China |
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| Abstract: | Abstract: By using the method of tectonic slab mapping in the continental orogenic belt, the authors carried out a systematic study of the Tazang tectonic belt of Jiuzhaigou. It is considered that the Tazang tectonic belt is a tectonic mélange belt with distinct northern and southern boundary faults. Its northern boundary is the Yazagou fault striking NW-SE, and the southern boundary is the Heye fault, which also strikes NW-SE. The Tazang tectonic belt extends in a NW-SE direction for as long as ca. 16-24 km with a width of 7-8 km and is composed of three Late Paleozoic and Triassic tectonic slabs (or blocks) of varying sizes and shapes and in faulted contact with sandy slate of the Tazang complex. Generally, there is no order between the slabs and there is order within the slabs. Microscopic deformation features are conspicuous and the three-dimensional finite strain measurements show compression in NE-SW and nearly S-N directions. Analysis of the tectonic environment of the survey area shows that there occurred four phases of deformation. |
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