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A geochemical study of acapulcoite and lodranite meteorites

Author
Field, Stephen W.
Published
Dec 1, 1993.
Physical Description
1 electronic document
Online Version

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Summary
Lodranites and acapulcoites (primitive achondrites) are two classes of meteorites with geochemical signatures similar to chondrite meteorites. Lodranites and acapulcoites, however, have few or none of the chondrules characteristic of the chondrites. Texturally the primitive achondrites appear to have been recystallized though planetary igneous or metamorphic processes. A study of five primitive achondrites, two lodranites, two acapulcoites, and one supposedly intermediate acapulcoite/lodranite, were analyzed petrographically and geochemically to determine the igneous and metamorphic processes which have affected them. Acapulcoites show little evidence of melt extraction. The geochemistry of lodranite samples indicates silicate and metal/sulfide melts were removed from the rocks. The mineralogy and geochemistry of the intermediate meteorite suggest the rock is a metal rich acapulcoite and not a lodranite.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19940020876.
Accession ID: 94N25358.
NASA. Johnson Space Center, National Aeronautics and Space Administration (NASA)(American Society for Engineering Education (ASEE) Summer Faculty Fellowship Program, 1993, Volume 1 13 p (SEE N94-25348; NASA. Johnson Space.
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