NDLI: Iron redox systematics of martian magmas

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Iron redox systematics of martian magmas

Content Provider	NASA Technical Reports Server (NTRS)
Author	Danielson, L. Martin, A. Newville, M. Pando, K. Righter, K. Sutton, S.
Copyright Year	2011
Description	Martian magmas are known to be FeO-rich and the dominant FeO-bearing mineral at many sites visited by the Mars Exploration rovers (MER) is magnetite [1]. Morris et al. [1] propose that the magnetite appears to be igneous in origin, rather than of secondary origin. However, magnetite is not typically found in experimental studies of martian magmatic rocks [2,3]. Magnetite stability in terrestrial magmas is well understood, as are the stability of FeO and Fe2O3 in terrestrial magmas [4,5]. In order to better understand the variation of FeO and Fe2O3, and the stability of magnetite (and other FeO-bearing phases) in martian magmas we have undertaken an experimental study with two emphases. First we document the stability of magnetite with temperature and fO2 in a shergottite bulk composition. Second, we determine the FeO and Fe2O3 contents of the same shergottite bulk composition at 1 bar and variable fO2 at 1250 C, and at variable pressure. These two goals will help define not only magnetite stability, but pyroxene-melt equilibria that are also dependent upon fO2.
File Size	175764
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110022974
Archival Resource Key	ark:/13960/t50g8nk9v
Language	English
Publisher Date	2011-11-17
Access Restriction	Open
Subject Keyword	Lunar And Planetary Science And Exploration Pyroxenes Magnetite Shergottites Planetary Geology Mars Planet Rocks Mars Surface Oxidation-reduction Reactions Iron Oxides Magma Roving Vehicles Mars Exploration 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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