Show simple item record

dc.contributor.authorMcCubbin, Francis M.
dc.contributor.authorLewis, Jonathan A.
dc.contributor.authorBarnes, Jessica J.
dc.contributor.authorElardo, Stephen M.
dc.contributor.authorBoyce, Jeremy W.
dc.date.accessioned2021-11-15T18:30:20Z
dc.date.available2021-11-15T18:30:20Z
dc.date.issued2021-12
dc.identifier.citationMcCubbin, F. M., Lewis, J. A., Barnes, J. J., Elardo, S. M., & Boyce, J. W. (2021). The abundances of F, Cl, and H2O in eucrites: Implications for the origin of volatile depletion in the asteroid 4 Vesta. Geochimica et Cosmochimica Acta.en_US
dc.identifier.issn0016-7037
dc.identifier.doi10.1016/j.gca.2021.08.021
dc.identifier.urihttp://hdl.handle.net/10150/662310
dc.description.abstractWe conducted a petrologic study of apatite within eight unbrecciated, non-cumulate eucrites and two monomict, non-cumulate eucrites. These data were combined with previously published data to quantify the abundances of F, Cl, and H2O in the bulk silicate portion of asteroid 4 Vesta (BSV). Using a combination of apatite-based melt hygrometry/chlorometry and appropriately paired volatile/refractory element ratios, we determined that BSV has 3.0–7.2 ppm F, 0.39–1.8 ppm Cl, and 3.6–22 ppm H2O. The abundances of F and H2O are depleted in BSV relative to CI chondrites to a similar degree as F and H2O in the bulk silicate portion of the Moon. This degree of volatile depletion in BSV is similar to what has been determined previously for many moderately volatile elements in 4 Vesta (e.g., Na, K, Zn, Rb, Cs, and Pb). In contrast, Cl is depleted in 4 Vesta by a greater degree than what is recorded in samples from Earth or the Moon. Based on the Cl-isotopic compositions of eucrites and the bulk rock Cl/F ratios determined in this study, the eucrites likely formed through serial magmatism of a mantle with heterogeneous δ37Cl and Cl/F, not as extracts from a partially crystallized global magma ocean. Furthermore, the volatile depletion and Cl-isotopic heterogeneity recorded in eucrites is likely inherited, at least in part, from the precursor materials that accreted to form 4 Vesta and is unlikely to have resulted solely from degassing of a global magma ocean, magmatic degassing of eucrite melts, and/or volatile loss during thermal metamorphism. Although our results can be reconciled with the past presence of wide-scale melting on 4 Vesta (i.e., a partial magma ocean), any future models for eucrite petrogenesis involving a global magma ocean would need to account for the preservation of a heterogeneous eucrite source with respect to Cl/F ratios and Cl isotopes.en_US
dc.description.sponsorshipNASAen_US
dc.language.isoenen_US
dc.publisherElsevier BVen_US
dc.rightsCopyright © Elsevier Ltd.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.subjectAchondritesen_US
dc.subjectApatiteen_US
dc.subjectChlorine isotopesen_US
dc.subjectMagma oceanen_US
dc.subjectMeteoritesen_US
dc.subjectWateren_US
dc.titleThe abundances of F, Cl, and H2O in eucrites: Implications for the origin of volatile depletion in the asteroid 4 Vestaen_US
dc.typeArticleen_US
dc.contributor.departmentLunar and Planetary Laboratory, University of Arizonaen_US
dc.identifier.journalGeochimica et Cosmochimica Actaen_US
dc.description.note24 month embargo; available online 27 August 2021en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.identifier.piiS0016703721004981
dc.source.journaltitleGeochimica et Cosmochimica Acta
dc.source.volume314
dc.source.beginpage270
dc.source.endpage293


Files in this item

Thumbnail
Name:
McCubbin et al 2021 GCA.pdf
Embargo:
2023-08-27
Size:
3.964Mb
Format:
PDF
Description:
Final Accepted Manuscript
Thumbnail
Name:
SupplementaryTablesEVPSubmitte ...
Embargo:
2023-08-27
Size:
173.6Kb
Format:
application/zip
Description:
Supplementary Tables

This item appears in the following Collection(s)

Show simple item record