Mapping Buried Faults Using the Temperature-Vegetation-Dryness Index with an Application in Yangla Copper Mining Area, Yunnan
详细信息
- 责任者：Zhou Dan (Institute of Mathematical Geology & Remote Sensing ; China University of Geosciences ; Wuhan 430074 ; China) ; Zhang Zhenfei
- 刊名：Earth Science
- 出版年：2013
- 卷期：38(2)
- 关键词：红外遥感 ; infrared remote sensing ; 隐伏构造 ; subsurface structure ; 云南 ; Yunnan Province
- 页码：p.423-430
- 图表：illus., 26 refs.
- 分类号：1600
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
In mountainous areas with eluvium overburden, thickness, moisture and vegetation of the overburden layer may be locally increased where faults are developed in the bedrock. At such localities thermal inertia of the near-surface materials is larger than that in the surrounding areas and relatively low surface temperature due to slower diurnal heating rate may be observed in the daytime. Therefore, the temperature-vegetation-dryness index (TVDI), a combination of surface temperature and vegetation, may be used to retrieve buried faults. Using Landsat7 ETM+ data, we have identified buried faults in this study with TVDI in Yangla copper mining district, Yunnan, which is about 26 km2 in area and is covered by residual deposits for the most part. A distribution map of faults of the district is obtained with linear lows of TVDI as indicators of buried faults combined with visible image interpretation and field investigation. While essential for mining practice in Yangla, our results show a remarkable potential of thermal infrared remote sensing in ore-field geological studies in poorly outcropped regions.