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oai:uvadoc.uva.es:10324/462552025-02-11T18:18:16Zcom_10324_1158com_10324_931com_10324_894col_10324_1242

ExoMars Raman Laser Spectrometer (RLS): development of chemometric tools to classify ultramafic igneous rocks on Mars Veneranda ., Marco López Reyes, Guillermo Eduardo Manrique Martínez, José Antonio Sanz Arranz, José Aurelio Lalla, Emmanuel Alexis Konstantinidis, Menelaos Moral Inza, Andoni Gaizka Medina García, Jesús Rull Pérez, Fernando Espectroscopia Raman, Quimiometría, Marte, Rocas ExoMars, Espectroscopia Raman, Quimiometría, Rocas Igneas ultramáficas, Marte 2103.03 Espectroscopia 2104.04 Geología Planetaria 2104.07 Planetas 2503.03 Geoquímica Exploratoria 2506.13 Petrología Ignea y Metamórfica Producción Científica This work aims to evaluate whether the multi-point analysis the ExoMars Raman Laser Spectrometer (RLS) will perform on powdered samples could serve to classify ultramafc rocks on Mars. To do so, the RLS ExoMars Simulator was used to study terrestrial analogues of Martian peridotites and pyroxenites by applying the operational constraints of the Raman spectrometer onboard the Rosalind Franklin rover. Besides qualitative analysis, RLS-dedicated calibration curves have been built to estimate the relative content of olivine and pyroxenes in the samples. These semi-quantitative results, combined with a rough estimate of the concentration ratio between clino- and ortho-pyroxene mineral phases, were used to classify the terrestrial analogues. XRD data were fnally employed as reference to validate Raman results. As this preliminary work suggests, ultramafc rocks on Mars could be efectively classifed through the chemometric analysis of RLS data sets. After optimization, the proposed chemometric tools could be applied to the study of the volcanic geological areas detected at the ExoMars landing site (Oxia Planum), whose mineralogical composition and geological evolution have not been fully understood Proyecto MINECO Retos de la Sociedad. Ref. ESP2017-87690-C3-1-R Proyecto MINECO Retos de la Sociedad. Ref. ESP2017-87690-C3-1-R 2021-04-19T20:58:26Z 2021-04-19T20:58:26Z 2020 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://doi.org/10.1038/s41598-020-73846-y Scientifc Reports, Octubre 2020, vol. 10, n. 16954. p. 1-14 2045-2322 http://uvadoc.uva.es/handle/10324/46255 1 16954 14 Scientific Reports 10 2045-2322 eng info:eu-repo/semantics/openAccess application/pdf Nature Research Nature Research