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REMOTE SENSING FOR LAND & RESOURCES    2011, Vol. 23 Issue (3) : 54-60     DOI: 10.6046/gtzyyg.2011.03.10
Technology and Methodology |
Research on the Methods for Extraction of Alteration Information by Using ASTER Data: A Case Study of the Chambishi Copper Deposit in Zambia
YU Jian1, DONG Yu-sen1, ZHANG Zhi1, YANG Ri-hong2
1. The Faculty of Earth Science, China University of Geosciences, Wuhan 430074, China;
2. China Aero Geophysical Survey & Remote Sensing Center for Land and Resources, Beijing 100083, China
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Abstract  

Based on several altered rocks in the Chambishi copper deposit and the spectral characteristics of the rocks existing in VNIR-SWIR bands of ASTER data,the authors adopted the methods of Relative absorption-Band Depth(RBD)and band ratio to enhance the mineral alteration information in this paper. The band ratio of ASTER 2/ASTER 1 and the RBD of ASTER 3 were used to enhance the chalcopyrite and pyrite information,the RBD of ASTER 8 was used to enhance biotite and calcite information,and the RBD of ASTER 6 was used to enhance the sericite information. To improve the existing method of Crosta principal component analysis,the authors applied the combination of the enhanced band ratio and RBD to Crosta method with the purpose of extracting the alteration information of the copper deposit and neighborhood areas in Chambishi. As proved by known copper deposit locations and geological analysis,the methods mentioned above can effectively extract the alteration information and distinguish the main minerals in the study area. The results are reliable,thus supplying references to the extraction of alteration information.

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TP 79

 
Issue Date: 07 September 2011
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YU Jian, DONG Yu-sen, ZHANG Zhi, YANG Ri-hong. Research on the Methods for Extraction of Alteration Information by Using ASTER Data: A Case Study of the Chambishi Copper Deposit in Zambia[J]. REMOTE SENSING FOR LAND & RESOURCES,2011, 23(3): 54-60.
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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2011.03.10     OR     https://www.gtzyyg.com/EN/Y2011/V23/I3/54


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