Mapping hydrothermal and supergene alteration zones associated with carbonate-hosted Zn-Pb deposits by using PRISMA satellite imagery supported by field-based hyperspectral data, mineralogical and geochemical analysis

Delineating hydrothermal alteration and supergene caps is fundamental for mineral exploration of sulfide ores. The aim this study to apply a multi-scale workflow based on hyperspectral remote proximal sensing data in order delineate dolomitization associated with the Mississippi Valley-Type Zn-Pb(-Ag) deposit Jabali (Western Yemen). area was investigated through images derived from new launched Italian Space Agency’s PRISMA satellite, which has higher spectral resolution compared multispectral sensors covers mineral-diagnostic wavelength regions (such as 2100 nm 2300 range) Signal Noise Ratio (SNR) ? 100. Spectral maps were produced band ratios method using specific feature extraction indices applied satellite data. results validated by Visible Near InfraRed (VNIR) Short Wave (SWIR) reflectance spectra, mineralogical (XRPD) geochemical (ICP-ES/MS) analyses rock samples collected area. dolomites footprint mapped Level 2C image, enhancing differences between limestones SWIR-2 region (major features centered at 2340 2320 nm, respectively). Gossans detected due Fe3+ absorption VNIR 900 nm. Zn-Pb mineralized area, extended approximately 25 km2, thus identified recognizing gossan occurrences dolomites. demonstrates that effective identifying outcrops sedimentary basins.