Volatile degassing of basaltic achondrite parent bodies Evidence from alkali elements and phosphorus

Details Volatile degassing of basaltic achondrite parent bodies Evidence from alkali elements and phosphorus Volatile degassing of basaltic achondrite parent bodies Evidence from alkali elements and phosphorus

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51..267m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 51, Feb. 1987, p. 267-278. NASA-supported research.

Computer Science

8

Abundance, Achondrites, Alkali Metals, Degassing, Meteoritic Composition, Phosphorus, Basalt, Iron Meteorites, Metallicity, Volatility, Meteorites, Outgassing, Volatiles, Achondrites, Basalt, Parent Bodies, Alkali Elements, Phosphorus, Eucrites, Diogenites, Stony-Iron Meteorites, Howardites, Mesosiderites, Comparisons, Element Ratios, Stony Meteorites, Samples, Meteorite, Abundance, Catalog, Data, Yamato Meteorites, Metal, Antarctic Meteorites, Incompatible Elements, Iiiab Irons, Differentiation, Refractory

Scientific paper

The Na, K, Rb, Cs, and P abundances in eucrites, diogenites, basaltic clasts from polymict eucrite, howardites, and mesosiderites are examined, and compared with an average of highly incompatible refractory (AHIR) elements normalized to cosmic abundances. It is observed that basaltic eucrites and basaltic clasts show a positive correlation between K, Rb, and Cs, and alkali element/AHIR ratios; the volatile loss of the alkali elements from the basalt affects the parent body inventory of volatile elements. The data reveal that for diogenites, the alkali /AHIR ratios are 1.4-2 times greater than in basaltic eucrites and are more variable; and the negative relation between K, Rb, Cs, and the alkali/AHIR ratio correlate with progressive alkali loss through volatile outgassing during crystallization of one or more magmas resulting in a greater than 90 percent loss of the volatile element inventory from the parent body. It is also detected that P displays volatile loss from the basaltic eucrites and elevated P/AHIR ratios in diogenites.

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