Browsing by Author "James O.B."

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LUNAR FERROAN ANORTHOSITE PETROGENESIS: CLUES FROM TRACE ELEMENT DISTRIBUTIONS IN FAN SUBGROUPS - DIFFICULTIES IN RETRIEVING MAGMA COMPOSITIONS FROM CHEMICALLY EQUILIBRATED BASALTIC METEORITES

Floss C.; James O.B.; McGee J.J.; Crozaz G. (1998)

The rare earth elements (REE) and selected other trace elements were measured in plagioclase and pyroxene from nine samples of the lunar ferroan anorthosite (FAN) suite of rocks. Samples were selected from each of four FAN ...
LUNAR HIGHLAND METEORITE DHOFAR 026 AND APOLLO SAMPLE 15418: TWO STRONGLY SHOCKED, PARTIALLY MELTED, GRANULITIC BRECCIAS

Cohen B.A.; Taylor L.A.; James O.B.; Nazarov M.A.; Barsukova L.D. (2004)

Studies of lunar meteorite Dhofar 026, and comparison to Apollo sample 15418, indicate that Dhofar 026 is a strongly shocked granulitic breccia (or a fragmental breccia consisting almost entirely of granulitic breccia ...
RARE EARTH ELEMENT VARIATIONS RESULTING FROM INVERSION OF PIGEONITE AND SUBSOLIDUS REEQUILIBRATION IN LUNAR FERROAN ANORTHOSITES

James O.B.; Floss C.; McGee J.J. (2002)

We present results of a secondary ion mass spectrometry study of the rare earth elements (REEs) in the minerals of two samples of lunar ferroan anorthosite, and the results are applicable to studies of REEs in all igneous ...

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