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SONG Yiwei, WANG Peng, LIAN Chenqin, DAI Xuejian, WANG Bin. 2021. Lithologic Mapping and Alteration Information Extracting Based on ASTER Spectral Signature: An Example from Nianzha Gold Deposit. Northwestern Geology, 54(2): 126-136. doi: 10.19751/j.cnki.61-1149/p.2021.02.010
Citation: SONG Yiwei, WANG Peng, LIAN Chenqin, DAI Xuejian, WANG Bin. 2021. Lithologic Mapping and Alteration Information Extracting Based on ASTER Spectral Signature: An Example from Nianzha Gold Deposit. Northwestern Geology, 54(2): 126-136. doi: 10.19751/j.cnki.61-1149/p.2021.02.010
shu

Lithologic Mapping and Alteration Information Extracting Based on ASTER Spectral Signature: An Example from Nianzha Gold Deposit

  • 1. Xi'an Center of Mineral Resources Survey, Xi'an 710100, Shaanxi, China;

  • 2. Xining Natural Resources Investigation Center, Xining 810012, Qinghai, China;

  • 3. Hohhot Natural Resources Investigation Center, Hohhot 010000, Inner Mongolia, China;

  • 4. Chengdu Military-civilian Integration Geological Survey Center, Chengdu 610000, Sichuan, China

Received Date:  29 September 2020
Revised Date:  22 January 2021
    Abstract
  • Lithologic interpretation and alteration information extracting based on ASTER spectral analysis have been widely used in ore exploration.The authors carried out the study in Nianzha gold deposit of Yarlung Zangbo suture zone.Minerals components such as Fe3+, Fe2+, Al-OH, Mg-OH, silicate and carbonate were analyzed based on ASTER spectrum. This paper used "band radio method + false color synthesis" for lithologic classification and geological mapping and quantitatively delineated the range of mineralization-relatedalteration zone and two prospecting target areas with the "geologic-remote sensing profiles + best density seperation method". The results show that lithological mapping and alteration information extracting based on aster spectral are suitable for prospecting prediction in high altitude areas of Tibet, which can accurately indicate the key prospecting indicators of lithology and alteration.It proves to be an important means of rapid and effective ore exploration in Tibet, and provides reference for other deposits of the same type in the belt.
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