Highly Siderophile Elements and the Rhenium-Osmium System in Chondritic Components

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dc.contributor.advisorWalker, Richard Jen_US
dc.contributor.authorArcher, Gregory Judeen_US
dc.contributor.departmentGeologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2013-02-06T07:33:12Z
dc.date.available2013-02-06T07:33:12Z
dc.date.issued2012en_US
dc.description.abstractChondritic meteorites and their components provide information about the early solar system, as well as processes that affected meteorite parent bodies post-accretion. The rare earth element (REE) abundances, highly siderophile element (HSE) abundances, Re-Os isotope systematics, Re isotopic composition, and Os isotopic composition were investigated in Allende chondritic components in order to: (1) classify several recently separated Allende calcium-aluminum-rich inclusions (CAIs) based on REE abundance patterns, (2) determine the abundances of six HSE (Re, Os, Ir, Ru, Pt, and Pd) in CAIs, chondrules, and matrix, and compare the different chondritic components, (3) further assess the magnitude and characteristics of open-system behavior on the Allende parent body using Re-Os of CAIs, chondrules, and matrix, (4) determine if the Re isotopic composition of CAIs was altered by cosmic ray interactions, and (5) investigate possible nucleosynthetic anomalies in CAIs.en_US
dc.identifier.urihttp://hdl.handle.net/1903/13580
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pquncontrolledAllendeen_US
dc.subject.pquncontrolledHighly Siderophile Elementsen_US
dc.subject.pquncontrolledMeteoritesen_US
dc.subject.pquncontrolledopen-system behavioren_US
dc.subject.pquncontrolledRare Earth Elementsen_US
dc.subject.pquncontrolledRhenium-Osmiumen_US
dc.titleHighly Siderophile Elements and the Rhenium-Osmium System in Chondritic Componentsen_US
dc.typeThesisen_US

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