Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/17096
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Fe Mossbauer spectroscopy as a tool in astrobiology
Authors: Schröder, Christian
Bailey, Brad
Klingelhoefer, Goestar
Staudigel, Hubert
Contact Email: christian.schroeder@stir.ac.uk
Keywords: Mössbauer spectroscopy
astrobiology
biogeochemistry
Mars
hydrothermal vent
Issue Date: Dec-2006
Publisher: Elsevier
Citation: Schröder C, Bailey B, Klingelhoefer G & Staudigel H (2006) Fe Mossbauer spectroscopy as a tool in astrobiology, Planetary and Space Science, 54 (15), pp. 1622-1634.
Abstract: The element Fe and Fe-bearing minerals occur ubiquitously throughout the field of astrobiology. Cycling between the various oxidation states of Fe provides a source of energy available for life. Banded iron formations may record the rise of oxygenic photosynthesis. The distribution of Fe between Fe-bearing minerals and its oxidation states can help to characterize and understand ancient environments with respect to the suitability for life by constraining the primary rock type and the redox conditions under which it crystallized, the extent of alteration and weathering, the type of alteration and weathering products, and the processes and environmental conditions for alteration and weathering. Fe Mo¨ ssbauer spectroscopy is a powerful tool to investigate Fe-bearing compounds. It can identify Fe-bearing minerals, determine Fe oxidation states with high accuracy, quantify the distribution of Fe between mineralogical phases, and provide clues about crystallinity and particle sizes. Two miniaturized Mössbauer spectrometers are on board of the NASA Mars Exploration Rovers Spirit and Opportunity. The Fe-bearing minerals goethite, an iron oxide-hydroxide, and jarosite, an iron hydroxide sulfate, were identified by Mössbauer spectroscopy in Gusev Crater and at Meridiani Planum, respectively, providing in situ proof of an aqueous history of the two landing sites and constraints on their habitability. Hematite identified by Mössbauer spectroscopy at both landing sites adds further evidence for an aqueous history. On Earth, Mössbauer spectroscopy was used to monitor possibly microbially-induced changes of Fe-oxidation states in basaltic glass samples exposed at the Loihi Seamount, a deep sea hydrothermal vent system, which might be analogous to possible extraterrestrial habitats on ancient Mars or the Jovian moon Europa today.
Type: Journal Article
URI: http://hdl.handle.net/1893/17096
DOI Link: http://dx.doi.org/10.1016/j.pss.2006.05.042
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Biological and Environmental Sciences
University of California, San Diego
Johannes Gutenberg University of Mainz
University of California, San Diego

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