Olivine-dominated asteroids and meteorites: Distinguishing nebular and igneous histories
dc.contributor.author | Sunshine, Jessica M. | |
dc.contributor.author | Bus, Schelte J. | |
dc.contributor.author | Corrigan, Catherine M. | |
dc.contributor.author | McCoy, Timothy J. | |
dc.contributor.author | Burbine, Thomas H. | |
dc.date.accessioned | 2021-02-12T21:41:19Z | |
dc.date.available | 2021-02-12T21:41:19Z | |
dc.date.issued | 2007-01-01 | |
dc.identifier.citation | Sunshine, J. M., Bus, S. J., Corrigan, C. M., McCoy, T. J., & Burbine, T. H. (2007). Olivine‐dominated asteroids and meteorites: Distinguishing nebular and igneous histories. Meteoritics & Planetary Science, 42(2), 155-170. | |
dc.identifier.issn | 1945-5100 | |
dc.identifier.doi | 10.1111/j.1945-5100.2007.tb00224.x | |
dc.identifier.uri | http://hdl.handle.net/10150/656238 | |
dc.description.abstract | Melting models indicate that the composition and abundance of olivine systematically co-vary and are therefore excellent petrologic indicators. However, heliocentric distance, and thus surface temperature, has a significant effect on the spectra of olivine-rich asteroids. We show that composition and temperature complexly interact spectrally, and must be simultaneously taken into account in order to infer olivine composition accurately. We find that most (7/9) of the olivine-dominated asteroids are magnesian and thus likely sampled mantles differentiated from ordinary chondrite sources (e.g.,pallasites). However, two other olivine-rich asteroids (289 Nenetta and 246 Asporina) are found to be more ferroan. Melting models show that partial melting cannot produce olivine-rich residues that are more ferroan than the chondrite precursor from which they formed. Thus, even moderately ferroan olivine must have non-ordinary chondrite origins, and therefore likely originate from oxidized R chondrites or melts thereof, which reflect variations in nebular composition within the asteroid belt. This is consistent with the meteoritic record in which R chondrites and brachinites are rare relative to pallasites. | |
dc.language.iso | en | |
dc.publisher | The Meteoritical Society | |
dc.relation.url | https://meteoritical.org/ | |
dc.rights | Copyright © The Meteoritical Society | |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | pallasites | |
dc.subject | R-chondrite | |
dc.subject | brachinites | |
dc.subject | meteorites | |
dc.subject | asteroid spectroscopy | |
dc.title | Olivine-dominated asteroids and meteorites: Distinguishing nebular and igneous histories | |
dc.type | Article | |
dc.type | text | |
dc.identifier.journal | Meteoritics & Planetary Science | |
dc.description.collectioninformation | The Meteoritics & Planetary Science archives are made available by the Meteoritical Society and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. | |
dc.eprint.version | Final published version | |
dc.description.admin-note | Migrated from OJS platform February 2021 | |
dc.source.volume | 42 | |
dc.source.issue | 2 | |
dc.source.beginpage | 155 | |
dc.source.endpage | 170 | |
refterms.dateFOA | 2021-02-12T21:41:19Z |