Mathematics – Logic
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43..589s&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 43, Apr. 1979, p. 589-602.
Mathematics
Logic
16
Achondrites, Geochemistry, Magma, Meteoritic Composition, Petrology, Basalt, Chemical Composition, Chemical Reactions, Crystallization, Enrichment, Minerals, Petrography, Phase Diagrams, Phase Transformations, Volatility, Meteorites, Volatile Elements, Achondrites, Chassignites, Peridotites, Classification, Shergottites, Nakhlites, Pressure, Melting, Models, Plagioclase, Liquids, Calcium, Feldspar, Eucrites, Petrology, Composition, Crystallization, Pyroxenes, Pigeonite, Orthopyroxenes, Alkalies
Scientific paper
Petrological evidence is used to support the hypothesis that although the magma source regions and parent bodies of basaltic achondrite, shergottite, nakhlite, and chassignite meteorites are clearly distinct, they may be simply related. It is proposed that the peridotites which on partial melting generated the parent magmas of the shergottite meteorites differed from those which gave rise to eucritic magmas by being enriched in a component rich in alkalis and other volatiles. Similarly, the source regions of the parent magmas of the nakhlite and chassignite meteorites differed from those on the shergottite parent body by being still richer in this volatile-rich component. These regions could have been related by processes such as mixture of variable amounts of volatile-rich and volatile-poor components in planetary or nebular settings, or alternatively by variable varying degrees of volatile loss from volatile-rich materials.
Hays James F.
McSween Harry Y.
Stolper Edward
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