NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Moessbauer Spectroscopy of Mineral Separates from SNC MeteoritesNumerous workers have recently focused attention on the issue of the oxygen fugacity (f(sub O2)) of martian samples. Estimates of fO2 based on Fe-Ti oxides and D(sub Eu)/D(sub Gd) and D(sub Eu)/D(sub Sm) ratios suggest a range of fO2 values for SNC meteorites from IW+2.5 - IW+3.5 for Shergotty to IW- 2.0 - IW+0.2 for QUE94201. Fe(3+)/Fe(2+) is also a function of f(sub O2), and synchrotron micro-XANES values for olivine, pyroxene, and feldspar Fe(3+) have been reported. However, the relationship between the reported Fe(3+) values and the other methods for estimating f(sub O2) is not clear, and further measurements of Fe(3+)/Fe(2+) by a more conventional technique have been needed. Accordingly, in this project, new Mossbauer spectroscopy data on mineral separates handpicked from 10 SNC meteorites are reported.
Document ID
20030111198
Document Type
Conference Paper
Authors
Dyar, M. D. (Mount Holyoke Coll. South Hadley, MA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar and Planetary Science and Exploration
Funding Number(s)
CONTRACT_GRANT: NAG5-10424
CONTRACT_GRANT: NAG5-12687
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

IDRelationTitle20030110578Analytic PrimaryLunar and Planetary Science XXXIV
Document Inquiry