Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
American Mineralogist Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
American Mineralogist; February 2005; v. 90; no. 2-3; p. 277-290; DOI: 10.2138/am.2005.1779
© 2005 Mineralogical Society of America
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via ISI Web of Science (22)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Papike, J.J.
Right arrow Articles by Shearer, C.K.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Comparative planetary mineralogy: Valence state partitioning of Cr, Fe, Ti, and V among crystallographic sites in olivine, pyroxene, and spinel from planetary basalts

J.J. Papike*, J.M. Karner and C.K. Shearer

Institute of Meteoritics, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131-1126, U.S.A.

Correspondence: * E-mail: jpapike{at}unm.edu

This is a comparative planetary mineralogy study emphasizing the valence-state partitioning of Cr, Fe, Ti, and V over crystallographic sites in olivine, pyroxene, and spinel from planetary basalts. The sites that accommodate these cations are the M2 site (6 to 8-coordinated) and M1 site (6-coordinated) in pyroxene, the M2 site (6- to 8-coordinated) and M1 (6-coordinated site) in olivine, and the tetrahedral and octahedral sites in spinel. The samples we studied are basalts from Earth, Moon, and Mars, and range in oxygen fugacity conditions from IW-2 (Moon) to IW+6 (Earth), with Mars somewhere in between (IW to IW+2). The significant elemental valence-states at these fO2 conditions are (from low to high fO2): Ti 4+, V3+, Fe2+, Cr2+, Cr3+, V4+, and Fe3+. V2+ and Ti3+ play a minor role in the phases considered for the Moon, and are found in very low concentrations. V5+ plays a minor role in these phases in oxidized terrestrial basalts because it is probably lower in abundance than V4+, and has an ionic radius that is so small (0.054 nm, 6-coordinated), that it is almost at the lower limit for octahedral coordination, and can even be tetrahedrally coordinated. The role of Cr2+ in the Moon is significant, as Cr2+ predominates in basaltic melts at fO2 less than IW-1. Lunar olivine has been found to contain mostly Cr2+, whereas coexisting pyroxene contains mostly Cr3+. Fe3+ is very important in Earth, less so in Mars, and nonexistent in the Moon. The importance of the Fe2+ to Fe3+ transition cannot be overstated and, indeed, their crystal-chemical differences, in terms of behavior (based on size and charge), are similar to the differences between Mg and Al. We note that for pyroxene in six of the seven terrestrial suites we studied, Fe3+ (in the M1 site) coupled with Al (in the tetrahedral site) is one of the two most important charge-balance substitutions. This substitution is of lesser importance in Mars and does not exist in lunar basalts.




This article has been cited by other articles:


Home page
 Reviews in Mineralogy and GeochemistryHome page
C. D. K. Herd
Basalts as Probes of Planetary Interior Redox State
Reviews in Mineralogy and Geochemistry, January 1, 2008; 68(1): 527 - 553.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J.M. Karner, J.J. Papike, S.R. Sutton, C.K. Shearer, G. McKay, L. Le, and P. Burger
Valence state partitioning of Cr between pyroxene-melt: Effects of pyroxene and melt composition and direct determination of Cr valence states by XANES. Application to Martian basalt QUE 94201 composition
American Mineralogist, November 1, 2007; 92(11-12): 2002 - 2005.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J.M. Karner, J.J. Papike, C.K. Shearer, G. McKay, L. Le, and P. Burger
Valence state partitioning of Cr and V between pyroxene-melt: Estimates of oxygen fugacity for martian basalt QUE 94201
American Mineralogist, July 1, 2007; 92(7): 1238 - 1241.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
C. Brigida, S. Poli, and M. Valle
High-temperature phase relations and topological constraints in the quaternary system MgO-Al2O3-SiO2-Cr2O3: An experimental study
American Mineralogist, May 1, 2007; 92(5-6): 735 - 747.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
S. G. Eeckhout, N. Bolfan-Casanova, C. McCammon, S. Klemme, and E. Amiguet
XANES study of the oxidation state of Cr in lower mantle phases: Periclase and magnesium silicate perovskite
American Mineralogist, May 1, 2007; 92(5-6): 966 - 972.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
E. Stoyanov, F. Langenhorst, and G. Steinle-Neumann
The effect of valence state and site geometry on Ti L3,2 and O K electron energy-loss spectra of TixOy phases
American Mineralogist, April 1, 2007; 92(4): 577 - 586.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J. J. Hagerty, C. K. Shearer, D. T. Vaniman, and P. V. Burger
Identifying the effects of petrologic processes in a closed basaltic system using trace-element concentrations in olivines and glasses: Implications for comparative planetology
American Mineralogist, October 1, 2006; 91(10): 1499 - 1508.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
C.K. Shearer, J.J. Papike, and J.M. Karner
Pyroxene europium valence oxybarometer: Effects of pyroxene composition, melt composition, and crystallization kinetics
American Mineralogist, October 1, 2006; 91(10): 1565 - 1573.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J. Karner, J.J. Papike, and C.K. Shearer
Comparative planetary mineralogy: Pyroxene major- and minor-element chemistry and partitioning of vanadium between pyroxene and melt in planetary basalts
American Mineralogist, October 1, 2006; 91(10): 1574 - 1582.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
C. D.K. Herd
Insights into the redox history of the NWA 1068/1110 martian basalt from mineral equilibria and vanadium oxybarometry
American Mineralogist, October 1, 2006; 91(10): 1616 - 1627.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
K. Righter, S.R. Sutton, M. Newville, L. Le, C.S Schwandt, H. Uchida, B. Lavina, and R.T. Downs
An experimental study of the oxidation state of vanadium in spinel and basaltic melt with implications for the origin of planetary basalt
American Mineralogist, October 1, 2006; 91(10): 1643 - 1656.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J.J. Papike, J.M. Karner, M.N. Spilde, and C.K. Shearer
Terrestrial analogs of martian sulfates: Major and minor element systematics of alunite-jarosite from Goldfield, Nevada
American Mineralogist, July 1, 2006; 91(7): 1197 - 1200.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
E. Balan, J. P.R. De Villiers, S. G. Eeckhout, P. Glatzel, M. J. Toplis, E. Fritsch, T. Allard, L. Galoisy, and G. Calas
The oxidation state of vanadium in titanomagnetite from layered basic intrusions
American Mineralogist, May 1, 2006; 91(5-6): 953 - 956.
[Abstract] [Full Text] [PDF]

Home page
 American MineralogistHome page
J. M. Karner, S. R. Sutton, J. J. Papike, C. K. Shearer, J. H. Jones, and M. Newville
Application of a new vanadium valence oxybarometer to basaltic glasses from the Earth, Moon, and Mars
American Mineralogist, February 1, 2006; 91(2-3): 270 - 277.
[Abstract] [Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2008 by Mineralogical Society of America