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dc.contributor.authorNava, J
dc.contributor.authorSuttle, Martin
dc.contributor.authorSpiess, R
dc.contributor.authorFolco, L
dc.contributor.authorNajorka, J
dc.contributor.authorCarli, C
dc.contributor.authorMassironi, M
dc.date.accessioned2021-06-16T10:26:03Z
dc.date.available2021-06-16T10:26:03Z
dc.date.issued2020-01
dc.date.submitted2020-01
dc.identifier.issn1086-9379
dc.identifier.doi10.1111/maps.13429
dc.identifier.urihttp://hdl.handle.net/10141/622912
dc.descriptiondoi: 10.1111/maps.13429en_US
dc.description.abstractAbstract TAM5.29 is an extraterrestrial dust grain, collected on the Transantarctic Mountains (TAM). Its mineralogy is dominated by an Fe-rich matrix composed of platy fayalitic olivines and clasts of andradite surrounded by diopside-jarosite mantles; chondrules are absent. TAM5.29 records a complex geological history with evidence of extensive thermal metamorphism in the presence of fluids at T < 300 °C. Alteration was terminated by an impact, resulting in shock melt veins and compaction-orientated foliation of olivine. A second episode of alteration at lower temperatures (<100 °C) occurred postimpact and is either parent body or terrestrial in origin and resulted in the formation of iddingsite. The lack of chondrules is explained by random subsampling of the parent body, with TAM5.29 representing a matrix-only fragment. On the basis of bulk chemical composition, mineralogy, and geological history TAM5.29 demonstrates affinities to the CVox group with a mineralogical assemblage in between the Allende-like and Bali-like subgroups (CVoxA and TAM5.29 are rich in andradite, magnetite, and FeNiS, but CVoxA lacks hydrated minerals, common in TAM5.29; conversely, CVoxB are rich in hydrated phyllosilicates but contain almost pure fayalite, not found in TAM5.29). In addition, TAM5.29 has a slightly different metasomatic history, in between the oxidized and reduced CV metamorphic grades while also recording higher oxidizing conditions as compared to the known CV chondrites. This study represents the third CV-like cosmic dust particle, containing a unique composition, mineralogy, and fabric, demonstrating variation in the thermal metamorphic history of the CV parent body(-ies).en_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rightsembargoedAccessen_US
dc.titleHydrothermal activity on the CV parent body: New perspectives from the giant Transantarctic Mountains minimeteorite TAM 5.29en_US
dc.typeJournal Articleen_US
dc.identifier.eissn1945-5100
dc.identifier.journalMeteoritics & Planetary Scienceen_US
dc.date.updated2021-04-21T12:50:26Z
dc.identifier.volume55en_US
dc.identifier.issue1en_US
dc.identifier.startpage164en_US
dc.description.nhmCopyright © 2020, Nava, J. et al. This document is the authors' final accepted version of the journal article. You are advised to consult the published version if you wish to cite from it.en_US
refterms.dateFOA2021-01-01T00:00:00Z


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