Reassessing the origin and chronology of the unique achondrite Asuka 881394: Implications for distribution of 26Al in the early Solar System

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dc.contributor.authorWimpenny, Josh B
dc.contributor.authorSanborn, Matthew E.
dc.contributor.authorKoefoed, Piers
dc.contributor.authorCooke, Ilsa R.
dc.contributor.authorStirling, Claudine H
dc.contributor.authorAmelin, Yuri
dc.contributor.authorYin, Qing-zhu
dc.date.accessioned2020-03-06T03:17:27Z
dc.date.issued2019
dc.date.updated2019-11-25T07:39:49Z
dc.description.abstractThe achondrite Asuka 881394 has mineralogy broadly similar to that of eucrites but is isotopically, chemically and texturally distinct from them. Previous U-Pb chronology shows that it is very old; forming within the first 0.8 Ma of the formation of calcium-aluminum rich inclusions (CAIs). However, the age difference between Asuka 881394 and other very old Solar System materials (CAIs, quenched angrites) measured with the 26Al-26Mg and 53Mn-53Cr extinct radionuclide chronometers, and 207Pb/206Pb chronometer, is not the same. This could be interpreted to reflect heterogeneity in the distribution of 26Al and 53Mn in the early Solar System. Given the significant implications for the early Solar System chronology if 26Al and 53Mn are indeed heterogeneously distributed, in this study we further investigate the origin of Asuka 881394 and the apparent age discordance between short-lived and absolute chronometers, by focusing on measurement of its ε54Cr composition, renewed measurements of the absolute Pb-Pb age and new, high precision measurements of its 26Al-26Mg systematics.
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0016-7037en_AU
dc.identifier.urihttp://hdl.handle.net/1885/202076
dc.language.isoen_AUen_AU
dc.publisherElsevieren_AU
dc.rights© 2018 Elsevier Ltden_AU
dc.sourceGeochimica et Cosmochimica Actaen_AU
dc.titleReassessing the origin and chronology of the unique achondrite Asuka 881394: Implications for distribution of 26Al in the early Solar Systemen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.lastpage501en_AU
local.bibliographicCitation.startpage478en_AU
local.contributor.affiliationWimpenny, Josh B, University of Californiaen_AU
local.contributor.affiliationSanborn, Matthew E., University of California at Davisen_AU
local.contributor.affiliationKoefoed, Piers, College of Science, ANUen_AU
local.contributor.affiliationCooke, Ilsa R., University of Otagoen_AU
local.contributor.affiliationStirling, Claudine H, University of Otagoen_AU
local.contributor.affiliationAmelin, Yuri, College of Science, ANUen_AU
local.contributor.affiliationYin, Qing-zhu, University of Californiaen_AU
local.contributor.authoremailu4437719@anu.edu.auen_AU
local.contributor.authoruidKoefoed, Piers, u5128222en_AU
local.contributor.authoruidAmelin, Yuri, u4437719en_AU
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040303 - Geochronologyen_AU
local.identifier.absfor020108 - Planetary Science (excl. Extraterrestrial Geology)en_AU
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciencesen_AU
local.identifier.ariespublicationu3102795xPUB394en_AU
local.identifier.citationvolume244en_AU
local.identifier.doi10.1016/j.gca.2018.10.006en_AU
local.identifier.scopusID2-s2.0-85055885723
local.identifier.uidSubmittedByu3102795en_AU
local.publisher.urlhttps://www.elsevier.com/en-auen_AU
local.type.statusPublished Versionen_AU

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