Examinando por Autor "Nieto, L. M."

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Acceso Abierto
Analytical database of Martian minerals (ADaMM): Project synopsis and Raman data overview
(Wiley Analytical Science, 2021-08-12) Veneranda, M.; Sanz Arranz, A.; Manrique, J. A.; Saiz, M.; García Prieto, C.; Pascual Sánchez, E.; Medina, J.; Konstantinidis, M.; Lalla, E.; Moral, A.; Nieto, L. M.; Rull, F.; López Reyes, G.; Agencia Estatal de Investigación (AEI); European Commission (EC); Veneranda, M. [0000-0002-7185-2791]; Lalla, E. A. [0000-0002-0005-1006]; Moral, A. G. [0000-0002-6190-8560]; López Reyes, G. [0000-0003-1005-1760]
The Mars2020/Perseverance and ExoMars/Rosalind Franklin rovers are both slated to return the first Raman spectra ever collected from another planetary surface, Mars. In order to optimize the rovers scientific outcome, the scientific community needs to be provided with tailored tools for data treatment and interpretation. Responding to this need, the purpose of the Analytical Database of Martian Minerals (ADaMM) project is to build an extended multianalytical database of mineral phases that have been detected on Mars or are expected to be found at the landing sites where the two rovers will operate. Besides the use of conventional spectrometers, the main objective of the ADaMM database is to provide access to data collected by means of laboratory prototypes simulating the analytical performances of the spectroscopic systems onboard the Mars 2020 and ExoMars rovers. Planned to be released to the public in 2022, ADaMM will also provide access to data treatment and visualization tools developed in the framework of the mentioned space exploration missions. As such, the present work seeks to provide an overview of the ADaMM online platform, spectral tools, and mineral collection. In addition to that, the manuscript describes the Raman spectrometers used to analyze the mineral collection and presents a representative example of the analytical performance ensured by the Raman prototypes assembled to simulate the Raman Laser Spectrometer (RLS) and SuperCam systems.
Acceso Abierto
Raman semi-quantification on Mars: ExoMars RLS system as a tool to better comprehend the geological evolution of martian crust
(Elsevier BV, 2021-10-13) Veneranda, M.; Manrique, J. A.; García Prieto, C.; Sanz Arranz, A.; Lalla, E.; Kostantinidis, M.; Moral, A.; Medina, J.; Rull, F.; Nieto, L. M.; López Reyes, G.; Agencia Estatal de Investigación (AEI); European Research Council (ERC); Redes de Excelencia, SIGUE-Mars: Ciencia e Instrumentación para el estudio de procesos (bio)geoquímicos en marte, RED2018-102600-T
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.