In situ measurement and sampling of acidic alteration products at Río Tinto in support of the scientific activity of the Ma_MISS instrument

We describe the procedures and results of a geological field analysis campaign in Río Tinto area. This geologically/biologically well-documented site with its rock/water/biology interaction represents an ideal open-air laboratory where to collect spectral data samples useful for testing space instruments. During campaign, we collected large set VIS-NIR (0.35–2.5 μm) measurements using ASD FieldSpec4 portable spectrometer both on biosignature-bearing rocks alteration hydrated products (sulfates, clays, oxides, etc.). Furthermore, as comparison field, report micro-Raman analyses carried out mineral/rock samples. work was conducted framework Mars Multispectral Imager Subsurface Studies (Ma_MISS) instrument that is miniaturized visible near-infrared (VIS-NIR) (0.5–2.3 devoted Martian subsurface exploration integrated into drilling system ESA Rosalind Franklin rover mission. Ma_MISS will acquire from excavated borehole wall. The scientific obtained by this confirm important enriching community’s grasp environment obtaining key information mineralogical geochemical evolution surface/subsurface. In addition, provides crucial preparation exploitation interpretation supply during active phase activity also defining priorities astrobiological objectives ground.