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Field-portable Mossbauer spectroscopy on Earth, the Moon, Mars, and beyond
journal contribution
posted on 2023-05-17, 11:41 authored by Schroder, C, Klingelhofer, G, Morris, RV, Bernhardt, B, Blumers, M, Fleischer, I, Rodionov, DS, Lopez, JG, de Souza Jr, PAIron occurs naturally as Fe2+, Fe3+, and, to a lesser extent, as Fe0. Many fundamental (bio)geochemical processes are based on redox cycling between these oxidation states. Mössbauer spectroscopy provides quantitative information about the distribution of Fe among its oxidation states, identification of Fe-bearing phases, and relative distribution of Fe among those phases. Portable, miniaturised Mössbauer spectrometers were developed for NASA’s Mars Exploration Rovers (in operation since 2004) and provide a means for non-destructive, in-situ field investigations. On Mars, these instruments provided evidence for aqueous activity with implications for habitability, were applied in geological mapping of the landing sites, and helped to identify meteorites, for example. On Earth, they were used in field studies of green rust, the identification of air pollution sources, or the study of archaeological artefacts. Their application to in-situ resource utilisation (ISRU) on the Moon has been demonstrated in a recent NASA field test of hardware for oxygen production. A new detector system in an advanced version of these instruments is based on Si Drift Detectors and permits the simultaneous acquisition of X-ray fluorescence spectra to determine elemental compositions.
History
Publication title
Geochemistry: Exploration, Environment, AnalysisVolume
11Pagination
129-143ISSN
1467-7873Department/School
School of Information and Communication TechnologyPublisher
Geological Society Publishing HousePlace of publication
United KingdomRights statement
Copyright 2011 AAG/Geological Society of LondonRepository Status
- Restricted