RT info:eu-repo/semantics/article
T1 Raman semi-quantification on Mars: ExoMars RLS system as a tool to better comprehend the geological evolution of martian crust
A1 Veneranda, Marco
A1 Manrique Martínez, José Antonio
A1 García Prieto, Clara
A1 Sanz Arranz, Aurelio
A1 Sáiz, Jesús
A1 Lalla, Emmanuel Alexis
A1 Konstantinidis, Menelaos
A1 Moral Inza, Andoni Gaizka
A1 Medina García, Jesús
A1 Rull Pérez, Fernando
A1 López Reyes, Guillermo Eduardo
K1 Raman spectroscopy
K1 Espectroscopia Raman
K1 Chemometrics
K1 Quimiometría
K1 ExoMars mission
K1 Misión ExoMars
AB This work presents the latest chemometric tools developed by the RLS science team to optimize the scientific outcome of the Raman system onboard the ExoMars 2022 rover. Feldspar, pyroxene and olivine samples were first analyzed through the RLS ExoMars Simulator to determine the spectroscopic indicators to be used for a proper discrimination of mineral phases on Mars. Being the main components of Martian basaltic rocks, lepidocrocite, augite and forsterite were then used as mineral proxies to prepare binary mixtures. By emulating the operational constraints of the RLS, Raman datasets gathered from laboratory mixtures were used to build external calibration curves. Providing excellent coefficients of determination (R2 0.9942÷0.9997), binary curves were finally used to semi-quantify ternary mixtures of feldspar, pyroxene and olivine minerals. As Raman results are in good agreement with real concentration values, this work suggests the RLS could be effectively used to perform semi-quantitative mineralogical studies of the basaltic geological units found at Oxia Planum. As such, crucial information about the geological evolution of Martian Crust could be extrapolated. In light of the outstanding scientific impact this analytical method could have for the ExoMars mission, further methodological improvements to be discussed in a dedicated work are finally proposed.
PB Elsevier
SN 0019-1035
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/47963
UL https://uvadoc.uva.es/handle/10324/47963
LA eng
NO Icarus, 2021, vol. 367, 114542
NO Producción Científica
DS UVaDOC
RD 19-sep-2024