Isotopic composition of carbonate in EETA 79001 and its relation to parent body volatiles

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Geochimica et Cosmochimica Acta; (USA)

DOI:https://doi.org/10.1016/0016-7037(88)90363-8· OSTI ID:5255508

Clayton, R N; Mayeda, Toshiko K ^[1]

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1. Univ. of Chicago, IL (USA)

Calcite, a probably extraterrestrial weathering product in the shergottite EETA 79001, has {delta}{sup 13}C = +9.7{per thousand} and {delta}{sup 18}O = +21.0{per thousand}. In order to account for the large excess of {sup 18}O relative to the silicate substrate ({delta}{sup 18}O = +4.2{per thousand}), a parent body surface reservoir containing both water and carbon dioxide is required. The inferred H{sub 2}O/CO{sub 2} ratio is consistent with estimates for the degassed reservoir on Mars.

• OSTI ID: 5255508
• Journal Information: Geochimica et Cosmochimica Acta; (USA), Journal Name: Geochimica et Cosmochimica Acta; (USA) Vol. 52:4; ISSN GCACA; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ALKALINE EARTH METAL COMPOUNDS
ANTARCTIC REGIONS
ANTARCTICA
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONATE MINERALS
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
GEOCHEMISTRY
GEOLOGIC HISTORY
INCLUSIONS
ISOTOPE RATIO
ISOTOPES
MARS PLANET
METEORITES
MINERALOGY
MINERALS
OXIDES
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
PLANETARY EVOLUTION
PLANETS
POLAR REGIONS
SOLAR SYSTEM EVOLUTION
WEATHERING