Integrated Geochemical Studies of the Shuram Excursion in Siberia and South China

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dc.contributor.advisorKaufman, Alan Jen_US
dc.contributor.authorPedersen, Matthewen_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.accessioned2024-09-23T06:35:39Z
dc.date.available2024-09-23T06:35:39Z
dc.date.issued2024en_US
dc.description.abstractThe Ediacaran Period Shuram Excursion (SE) is a globally-distributed and highly controversial phenomenon where over millions of years, sedimentary carbonates record δ13C values of -10‰ and lower. This carbon cycle anomaly may reflect disequilibrium in the world’s oceans, driven by the oxidation of a large pool of dissolved organic carbon (DOC), with the oxidants sourced from the intense weathering of the continents, forcing major changes to ocean chemistry through the ventilation of the deep ocean, evidenced by a positive shift in carbonate uranium isotope values, and invoking the onset of early animal biomineralization. This study utilizes high-resolution carbonate Li isotopes from two SE-successions, U isotopes, REE abundances and Ce anomalies which reveal the dynamic interplay between intensified continental weathering associated with tectonic reconfiguration and the subsequent environmental and ecological response that may have been amplified by the ecosystem-engineering abilities of a newly discovered sponge-grade animal.en_US
dc.identifierhttps://doi.org/10.13016/wgor-fft4
dc.identifier.urihttp://hdl.handle.net/1903/33487
dc.language.isoenen_US
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pqcontrolledSedimentary geologyen_US
dc.subject.pqcontrolledBiogeochemistryen_US
dc.subject.pquncontrolledLithium Isotopesen_US
dc.subject.pquncontrolledPaleoredoxen_US
dc.subject.pquncontrolledUranium Isotopesen_US
dc.titleIntegrated Geochemical Studies of the Shuram Excursion in Siberia and South Chinaen_US
dc.typeThesisen_US

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