Geochemical and Radiometric Constraints on the Redox History of Late Ediacaran Oceans

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dc.contributor.advisorKaufman, Alan J.en_US
dc.contributor.authorPeek, Saraen_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.accessioned2012-10-11T06:20:57Z
dc.date.available2012-10-11T06:20:57Z
dc.date.issued2012en_US
dc.description.abstractOver the past decade, significant field and laboratory studies have been devoted to furthering understanding of the chemical conditions that accompanied the origin and diversification of Earth's earliest multicellular animals during the Ediacaran Period (ca. 635-542 Ma). Here, I apply geochemical methods to excellently preserved and exposed sections spanning approximately the last 10 million years of the Ediacaran Period. From Arctic Siberia, hundreds of samples were collected at high stratigraphic resolution, from which carbonate carbon and oxygen profiles have been produced, along with organic carbon and sulfur isotope data. From South China, a carbonate carbon isotope profile has been constructed. Radiometric dates constrain the timing of deposition in our sections. This work uses geochemical data and radiometric dating to inform and improve intra- and inter-basinal correlation, and serves as a preliminary study confirming the suitability of our Siberian sections to the study of oxygenation during the latest Ediacaran Period.en_US
dc.identifier.urihttp://hdl.handle.net/1903/13272
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pqcontrolledGeologyen_US
dc.subject.pquncontrolledChinaen_US
dc.subject.pquncontrolledcorrelationen_US
dc.subject.pquncontrolledEdiacaranen_US
dc.subject.pquncontrolledradiometric datesen_US
dc.subject.pquncontrolledredoxen_US
dc.subject.pquncontrolledSiberiaen_US
dc.titleGeochemical and Radiometric Constraints on the Redox History of Late Ediacaran Oceansen_US
dc.typeThesisen_US

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