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dc.contributor.authorKillen, R. M.
dc.date.accessioned2021-02-12T20:56:04Z
dc.date.available2021-02-12T20:56:04Z
dc.date.issued2003-01-01
dc.identifier.citationKillen, R. M. (2003). Depletion of sulfur on the surface of asteroids and the Moon. Meteoritics & Planetary Science, 38(3), 383-388.
dc.identifier.issn1945-5100
dc.identifier.doi10.1111/j.1945-5100.2003.tb00273.x
dc.identifier.urihttp://hdl.handle.net/10150/655667
dc.description.abstractData from the X-ray and -ray spectrometers onboard the Near Earth Asteroid Rendezvous (NEAR) spacecraft were used to constrain the chemical and mineralogical composition of asteroid 433 Eros (McCoy et al. 2001). The bulk composition appears to be consistent with that of L to H chondrites (Nittler et al. 2001). However, there appeared to be a marked depletion relative to ordinary chondritic composition in the S/Si ratio (0.014 +/- 0.017). We investigate space weathering mechanisms to determine the extent to which sulfur can be preferentially lost from the surface regolith. The two processes considered are impact vaporization by the interplanetary meteoroid population and ion sputtering by the solar wind. Using impact data for Al projectiles onto enstatite, we find that the vaporization rate for troilite (FeS) is nine times as fast as that for the bulk of the regolith. If 20% of the iron is in the form of troilite, then the net vaporization rate, normalized to bulk composition, is 2.8 times faster for sulfur than for iron. Sputtering is equally efficient at removing sulfur as impact vaporization.
dc.language.isoen
dc.publisherThe Meteoritical Society
dc.relation.urlhttps://meteoritical.org/
dc.rightsCopyright © The Meteoritical Society
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectReflectance spectra
dc.subjectImpact vaporization
dc.subjectMoon
dc.subjecthydrated minerals
dc.subjectasteroids
dc.titleDepletion of sulfur on the surface of asteroids and the moon
dc.typeArticle
dc.typetext
dc.identifier.journalMeteoritics & Planetary Science
dc.description.collectioninformationThe 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.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume38
dc.source.issue3
dc.source.beginpage383
dc.source.endpage388
refterms.dateFOA2021-02-12T20:56:05Z


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