Hydrothermally altered mineral mapping using synthetic application of Sentinel-2A MSI, ASTER and Hyperion data in the Duolong area, Tibetan Plateau, China

•Sentinel-2A MSI, ASTER, and Hyperion satellite data are combined to map hydrothermally altered minerals in arid areas.•The extreme learning machine (ELM) is used to map the Al-OH and Mg-OH group minerals.•The anomaly-overlaying selection method is introduced to map iron oxides and hydroxyl-bearing minerals.•Three mineralization prospects are found by remote sensing results and field validation.