NDLI: Magnetite in martian meteorite mil 03346 and gusev adirondack class basalt: moessbauer evidence for variability in the oxidation state of adirondack lavas

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Magnetite in martian meteorite mil 03346 and gusev adirondack class basalt: moessbauer evidence for variability in the oxidation state of adirondack lavas

Content Provider	NASA Technical Reports Server (NTRS)
Author	Schroeder, C. Klingelhoefer, G. Yen, A. Morris, R. V. Rodionov, D. Ming, D. W. McKay, G. A.
Copyright Year	2006
Description	The Moessbauer spectrometers on the Mars Exploration Rovers Spirit (Gusev crater) and Opportunity (Meridiani Planum) have returned information on the oxidation state of iron, the mineralogical composition of Fe-bearing phases, and the distribution of Fe among oxidation states and phases [1,2,3]. To date, ~100 and ~85 surface targets have been analyzed by the Spirit and Opportunity spectrometers, respectively. Twelve component subspectra (8 doublets and 4 sextets) have been identified and most have been assigned to mineralogical compositions [4]. Two sextet subspectra result from the opaque and strongly magnetic mineral magnetite (Fe3O4 for the stoichiometric composition), one each for the crystallographic sites occupied by tetrahedrally-coordinated Fe3+ and by octahedrally-coordinated Fe3+ and Fe2+. At Gusev crater, the percentage of total Fe associated with magnetite for rocks ranges from 0 to ~ 35% (Fig. 1) [3]. The range for soils (~5 to ~12% of total Fe from Mt, with one exception) is narrower. The ubiquitous presence of Mt in soil firmly establishes the phase as the strongly magnetic component in martian soil
File Size	239023
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080026167
Archival Resource Key	ark:/13960/t8ff8r90p
Language	English
Publisher Date	2006-03-13
Access Restriction	Open
Subject Keyword	Geophysics Stoichiometry Mineralogy Iron Targets Crystallography Mars Exploration Soils Magnetite Mars Craters Spectrometers Rocks Oxidation Mars Surface Snc Meteorites Roving Vehicles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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