Olivine diogenites: The mantle of the eucrite parent body

Journal Article · Sun Mar 31 23:00:00 EST 1991 · Geochimica et Cosmochimica Acta; (USA)

DOI:https://doi.org/10.1016/0016-7037(91)90166-3· OSTI ID:5668385

Sack, R O; Azeredo, W J; Lipschutz, M E ^[1]

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1. Purdue Univ., IN (USA)

Two olivine-rich Antarctic diogenites (ALH A77256 and ALH 84001) of the howardite-eucritediogenite (HED) meteorite association have olivine/pyroxene ratios similar to normative ratios in devolatilized ordinary chondrites. Based on chemical data and petrological analysis, these meteorites represent the residuum of partial melting of the mantle in the eucrite parent body (EPB). Mineral assemblages in these olivine-rich diogenites record a continuum in thermal histories from initial partial melting (1150-1200{degree}C) to subsolidus re-equilibration (795 {plus minus} 55{degree}C). The small number of olivine-rich diogenites known hints that only the outer portion of the EPB has been sampled.

• OSTI ID: 5668385
• Journal Information: Geochimica et Cosmochimica Acta; (USA), Journal Name: Geochimica et Cosmochimica Acta; (USA) Vol. 55:4; ISSN GCACA; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ALKALINE EARTH METAL COMPOUNDS
CHEMISTRY
CHONDRITES
CONCENTRATION RATIO
CRYSTALLIZATION
GEOCHEMISTRY
GEOLOGIC HISTORY
GEOLOGY
GEOTHERMOMETRY
IRON COMPOUNDS
IRON SILICATES
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
METEORITES
MINERALOGY
MINERALS
OLIVINE
OXYGEN COMPOUNDS
PETROGENESIS
PETROLOGY
PHASE TRANSFORMATIONS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
STONE METEORITES
TRANSITION ELEMENT COMPOUNDS