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dc.contributor.authorGregory, Julia D.en_US
dc.date.accessioned2016-08-24T20:00:18Z
dc.date.available2016-08-24T20:00:18Z
dc.date.created2016.en_US
dc.date.created2016en_US
dc.date.issued2016en_US
dc.identifierTCU Master Thesisen_US
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/11275
dc.descriptionTitle from thesis title page (viewed Mar. 8, 2017).en_US
dc.descriptionIncludes abstract.en_US
dc.descriptionThesis--Texas Christian University, 2016.en_US
dc.descriptionDepartment of Geology, Energy, and the Environment; advisor, Rhiannon Mayne.en_US
dc.descriptionIncludes bibliographical references.en_US
dc.descriptionText (electronic thesis) in PDF.en_US
dc.description.abstractChoteau is classified as an ungrouped pallasite due to its dissimilarity to other pallasite groups and its oxygen isotopic similarity to the acapulcoites/lodranites. This study uses oxygen isotope analyses, mineral chemistry, and trace element analyses to determine Choteaus petrogenesis and if it is related to any ungrouped pallasites or the acapulcoites/lodranites. We found that Choteau contains plagioclase, being only the second plagioclase-bearing pallasite. This suggests that Choteau formed at the core-mantle boundary of a parent body with a large core-to-mantle ratio, which would facilitate pressures low enough for plagioclase to remain stable in the mantle. When compared with other pallasites, Choteau is unique in mineral composition and oxygen isotope ratios, therefore representing its own group of pallasites. Choteau shows similarities to the acapulcoites/lodranites in terms of oxygen isotope ratios, mineral chemistry, and trace element abundances, but not in texture. Choteau could represent a pallasite from the acapulcoite/lodranite parent body.--Abstract.en_US
dc.format.mediumFormat: Onlineen_US
dc.publisher[Fort Worth, TX] : Texas Christian University,en_US
dc.relation.ispartofUMI thesis.en_US
dc.relation.requiresMode of access: World Wide Web.en_US
dc.relation.requiresSystem requirements: Adobe Acrobat reader.en_US
dc.titleCharacterization of the ungrouped pallasite Choteau [electronic resource] /en_US
dc.typeTexten_US
local.academicunitSchool of Geology, Energy and the Environment
local.subjectareaGeological Sciences


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