Using ASD data to identify the altered minerals for exploring of gold deposit in the Beishan area, North China

6th Digital Earth Summit

地球科学;计算机科学

Ren, G.L.^1 ; Yi, H.^1 ; Yang, M.^1 ; Liang, N.^1 ; Li, J.Q.^1 ; Yang, J.L.^1

Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits, MLR/ xi'An Center of Geological Survey, Geological Survey of China, Xi'an, China^1

关键词: ASD-field spectrometers;    Distribution characteristics;    Geological units;    Gold mineralization;    Hyperspectral information;    Metallogenic belt;    Mineral assemblage;    Mineralized zone;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/46/1/012004/pdf
DOI  :  10.1088/1755-1315/46/1/012004

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Hyperspectral information of altered minerals plays an important role in the identifications of mineralized zones. In this study, the altered minerals of two gold deposits from Fangshankou-Laojinchang regions of Beishan metallogenic belt were measured by ASD field Spectrometer. Many gold deposits would have a close relationship with Variscan magma intrusion, which have been found in study region. The alteration minerals have been divided six types by the spectral results, i.e. sericite, limonite, dolomite, chlorite, epidote and calcite. The distribution characteristics and formations of altered minerals were discussed here. By the ASD, the spectral curve of different geological units in the Jintanzi and Fangshankou gold deposits were analysed and summarized. The results show that the sericite and limonite are mainly related with the gold mineralization and widely occurred in the gold deposits. Therefore, we proposed that the sericite and limonite are the iconic alteration mineral assemblages for gold mineralization and the models of altered minerals for gold deposits could be established in this region.