| 基于GF-1影像的西藏亚东地区构造解译研究 |
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| 作者姓名： | 刘智 黄洁 孙小飞 范敏 韩磊 |
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| 作者单位： | 1.四川省地质调查院,成都 610081;2.成都理工大学地学空间信息技术国土资源部重点实验室,成都 610059 |
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| 基金项目： | 中国地质调查局“全国边海防地区基础地质遥感调查(编号: DD20160076)”项目资助 |
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| 摘 要： | 随着地质调查工作精度的提高,中低分辨率的遥感影像已难以满足地质构造深入解译的需求。高分一号(GF-1)影像的应用为提高地质构造解译尺度提供了数据基础,特别是在人车通达性较差的地区,可大大减少野外工作量。为此,以地质构造发育的西藏亚东地区为研究区,利用GF-1影像,在分析已有地质资料基础上,构建了研究区的断裂形成机制模型,并结合地形地貌特征,对研究区的地质构造进行遥感解译。结果显示: ①研究区内解译新增断裂418条; ②受SN向应力挤压机制影响,形成于中新世晚期的EW走向断裂为主要断裂,其性质为逆冲断层,EW向应力的引张作用,形成了研究区SN向、NE向断裂,并具有多期活动特点; ③河流和湖泊受断裂控制明显,河流多成SN向,位于逆冲断层上盘的隆升造成了区内河流和湖泊的水位降低。
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| 关 键 词： | GF-1影像 遥感 构造 |
| 收稿时间： | 2017-03-28 |
Study on interpretation of geological structure in Tibetan Yadong region using GF-1 satellite images |
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| Authors: | LIU Zhi HUANG Jie SUN Xiaofei FAN Min HAN Lei |
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| Institution: | 1. Sichuan Geologic Survey, Chengdu 610081, China;2. Key Laboratory of Geoscience Spatial Information Technology (Ministry of Land and Resources), Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | With the precision improvement of geological survey work, moderate and low resolution remote sensing images can no longer meet the scale requirement of geological structure interpretation. The application of GF-1 satellite images provides data foundation for improving geological structure interpretation scale, especially in the remote and inaccessible areas, and significantly reduces the amount of field work. Therefore, the authors chose Tibetan Yadong region as the study area where geological structures are well developed. Using GF-1 satellite images, the authors established the model of fault formation mechanism in the study area based on the analysis of previous geological materials. Considering the features of regional topographic and geomorphic conditions, the authors conducted remote sensing interpretation for geological structure in the study area. The results showed that: ① Within the study area, 418 faults were interpreted.②Under the impact of south-north tectonic compress stress, the major east-west fault was formed during Late Miocene, which was a thrust fault. Under the stretch effect of east-west compress stress, the south-north and north-east faults were formed within the study area, with multistage structural activities.③ Rivers and lakes were significantly controlled by faults, among which the rivers were most likely originated in south-north direction. In addition, the uplift of the hanging wall of the thrust fault causes the decline of water table within the study area. |
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| Keywords: | GF-1 satellite images remote sensing geological structure |
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