A New Oxygen Barometer for Solar System Basaltic Glasses Based on Vanadium ValenceThe determination of oxidation conditions for basaltic magmas derived by the melting of planetary mantles is critical to our understanding of the nature and evolution of planetary interiors. Yet, these determinations are compromised in terrestrial and especially extraterrestrial basalts by our analytical and computational methods for estimating oxygen fugacity (fO2). For example, mineralogical barometers (1, 2) can be reduced in effectiveness by subsolidus re-equilibration of mineral assemblages, inversion of mineralogical data to melt characteristics, and deviations of the natural mineral compositions from ideal thermodynamic parameters.
Document ID
20040056063
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Karner, J. M. (New Mexico Univ. Albuquerque, NM, United States)
Sutton, S. R. (Chicago Univ. Chicago, IL, United States)
Papike, S. R. (New Mexico Univ. Albuquerque, NM, United States)
Delaney, J. S. (Rutgers Univ. New Brunswick, NJ, United States)
Shearer, C. K. (New Mexico Univ. Albuquerque, NM, United States)
Newville, M. (Chicago Univ. Chicago, IL, United States)
Eng, P. (Chicago Univ. Chicago, IL, United States)
Rivers, M. (Chicago Univ. Chicago, IL, United States)
Dyar, M. D. (Mount Holyoke Coll. South Hadley, MA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Lunar and Planetary Science XXXV: Special Session: Oxygen in the Solar System, II