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Role of changing effective bulk composition in the formation of grossular zoning during garnet granulite metamorphism in the Western Fiordland Orthogneiss, NZ

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dc.contributorDonahoe, Rona Jean
dc.contributorGenareau, Kimberly D.
dc.contributorTulloch, A. J.
dc.contributor.advisorStowell, Harold Hilton
dc.contributor.authorNorton, Rebecca Ann
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2017-03-01T17:39:13Z
dc.date.available2017-03-01T17:39:13Z
dc.date.issued2015
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractGarnet compositions and zoning, which are important records of crustal processes, are often used to constrain P-T-t paths for deep crustal rocks now exposed at the surface. These P-T-t paths require knowledge of the stable minerals and effective bulk composition during each increment of garnet growth, because effective bulk composition may change due to compositional fractionation by mineral growth and/or mass transfer. The importance of changing effective bulk composition as the result of partial melting is shown for two samples from the Western Fiordland Orthogneiss, New Zealand. Both samples experienced partial melting during garnet granulite metamorphism. High grossular garnet rims in granulite from Fiordland and elsewhere have been interpreted to result from pressure increases during garnet growth. Pseudosection models presented here indicate that changes in effective bulk composition from host, to garnet reaction zone, and then to leucosome, could produce peritectic garnet with high-grossular rims which grew along an isobaric path during melting and/or melt injection.en_US
dc.format.extent51 p.
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otheru0015_0000001_0002188
dc.identifier.otherNorton_alatus_0004M_12505
dc.identifier.urihttps://ir.ua.edu/handle/123456789/2555
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectGeology
dc.subjectPetrology
dc.titleRole of changing effective bulk composition in the formation of grossular zoning during garnet granulite metamorphism in the Western Fiordland Orthogneiss, NZen_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Geological Sciences
etdms.degree.disciplineGeology
etdms.degree.grantorThe University of Alabama
etdms.degree.levelmaster's
etdms.degree.nameM.S.

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