| Technology Application |
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Remote sensing geological characteristics and ore prediction in the Ga’erqiong Cu-Au deposit,Tibet |
| ZHANG Tingbin1,2, TANG Juxing3, LI Zhijun1, YI Guihua1,4, BIE Xiaojuan1, WU Hua5, GUO Na1,4, ZHANG Zhi1 |
1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;
2. Key Laboratory of Geoscience Spatial Information Technology, Ministry of Land and Resources, Chengdu 610059, China;
3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;
4. Geomathematics Key Laboratory of Sichuan Province, Chengdu 610059, China;
5. Tibet Institute of Geological Survey, Lhasa 650000, China |
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Abstract The discovery of the Ga'erqiong Cu-Au deposit is an important breakthrough of ore prospecting in western Bangong Lake-Nujiang River metallogenic belt. There are two types of orebodies discovered in this area: One is skarn type, and the other is structure-fracture zone type. Previous studies in this area noticed the genetic relation between granite porphyry and skarn. The authors hold that the Ga'erqiong area has a relatively large ore potential of porphyry deposits. In this paper, based on multi-spectral remote sensing data and aimed at finding new porphyry deposits, the authors carried out the interpretation of linear structure, circular structure, gossanand wall rock zoning, and conducted the extraction of ferric alterations and hydroxyl alterations by using principal component analysis method. The results show that there are NW-NNW trending, NE-NNE trending and nearly SN-trending linear structure groups developed in the study area. Circular structures can be classified into five circular structure systems according to the combined styles. Gossans are comparatively in agreement with mineralized alterations. The wall rocks are rather complicated, but they are favorable for copper mineralization in the Ga'erqiong copper deposit. It is considered that the circular structure systems are the key areas for further ore prospecting.
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| Keywords
ZY-1 02C satellites
GF-1 satellites
Tibet
mine monitoring
remote sensing
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Issue Date: 17 September 2014
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2014,
Vol. 26
