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Title: Valence state partitioning of vanadium between pyroxene-melt: effects of pyroxene and melt composition and direct determination of V valence by XANES

This paper continues the study of the partitioning of multivalent elements between pyroxene-melt in synthetic charges of martian basalt QUE 94201 composition. Here we concentrate on the partitioning of V between augite/melt and pigeonite/melt. Previous studies have used the partitioning of V between minerals and melt to estimate the fO2 condition and setting of terrestrial and extraterrestrial lavas. Although the V partitioning studies have been successful in estimating fO{sub 2}, they provide no direct determination of V valence in the minerals or the melt. That information is now obtainable through XANES spectroscopy, and here we report XANES data on the same pyroxene grains that we measured the partitioning data.
Authors:
; ; ; ; ; ;  [1] ;  [2] ;  [2]
  1. (Univ NM)
  2. (
Publication Date:
OSTI Identifier:
1009048
Resource Type:
Conference
Resource Relation:
Conference: Lunar and Planetary Science XXXIX;March 10-14, 2008 ;League City, TX
Publisher:
Lunar and Planetary Science XXXIX;LPI, Lunar and Planetary Institute;1110
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
ENGLISH
Subject:
58 GEOSCIENCES; BASALT; SILICATE MINERALS; SPECTROSCOPY; VALENCE; VANADIUM