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Phase equilibria study of pseudobrookite type mineralsPseudobrookite, is found in volcanic rocks, and the mineral armalcolite ((Fe,Mg)Ti2O5) found in the Apollo 11 and subsequent lunar samples seems to be unique to the moon. In plutonic rocks on the earth, ilmenite and rutile were found with what appears to be an equilibrium liquidus texture, while on the moon armalcolite often appears to be the primary liquidus phase among Ti-oxides. This suggests that total pressure may be a factor in the formation of these minerals, and a knowledge of the phase relations in this system yields information about the pressure under which a given magma crystallized.
Document ID
19740025768
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Friel, J. J. (Pennsylvania Univ. Philadelphia, PA, United States)
Date Acquired
September 3, 2013
Publication Date
September 27, 1974
Subject Category
Geophysics
Report/Patent Number
NASA-CR-140490
Accession Number
74N33881
Funding Number(s)
CONTRACT_GRANT: NSG-7031
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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