世界核地质科学2026，Vol.43Issue(1)：188-197,10.DOI:10.3969/j.issn.1672-0636.2026.01.016
EnMAP星载高光谱数据蚀变矿物填图
Application of EnMAP spaceborne hyperspectral data to alteration mineral mapping
赵洪萱 1刘洪成 2谭宏婕 3田建吉 1张川1
作者信息
- 1. 铀资源探采与核遥感全国重点实验室,北京 100029||核工业北京地质研究院,北京 100029
- 2. 铀资源探采与核遥感全国重点实验室,北京 100029||核工业北京地质研究院,北京 100029||北京大学地球与空间科学学院,北京 100871
- 3. 中国地质大学(北京)地球科学与资源学院,北京 100083
- 折叠
摘要
Abstract
The EnMAP spaceborne hyperspectral sensor has notable advantages in signal-to-noise ratio and spectral response stability.To evaluate the applicability and reliability of EnMAP hyperspectral data for regional-scale mineral mapping,this study investigated alteration mineral identification and spatial distribution in the western Xuemistan area,Xinjiang,using EnMAP Level-2A surface reflectance data acquired in 2025.Considering the low spatial resolution of spaceborne hyperspectral data and the associated mixed-pixel effects,a workflow integrating Minimum Noise Fraction(MNF)transformation,Pixel Purity Index(PPI)endmember extraction,and n-dimensional visualization analysis was applied to extract representative alteration mineral endmembers,including muscovite,chlorite,dolomite,and calcite.Mineral identification was then performed using the Spectral Angle Mapper(SAM)and Mixture-Tuned Matched Filtering(MTMF)methods.The results show that EnMAP data effectively identify the major alteration minerals in the study area.The derived mineral types and spatial distribution patterns are consistent with those obtained from airborne CASI/SASI hyperspectral data,indicating that EnMAP hyperspectral data have strong potential for regional-scale mineral mapping and mineral prospectivity analysis.关键词
EnMAP/高光谱/矿物填图/混合调谐匹配滤波(MTMF)Key words
EnMAP/hyperspectral remote sensing/mineral mapping/MTMF分类
天文与地球科学引用本文复制引用
赵洪萱,刘洪成,谭宏婕,田建吉,张川..EnMAP星载高光谱数据蚀变矿物填图[J].世界核地质科学,2026,43(1):188-197,10.
