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Rhenium-osmium geochronology and geochemistry of the Upper Jurassic marine black shales, Agardhfjellet Formation, Central Spitsbergen, Svalbard and mercury degradation of Upper Permian shales, East Greenland and mid-Norwegian shelf

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dc.contributor.authorPark, Junhee, author
dc.contributor.authorHannah, Judith, advisor
dc.contributor.authorHarry, Dennis, committee member
dc.contributor.authorBorch, Thomas, committee member
dc.contributor.authorGeorgiev, Svetoslav, committee member
dc.contributor.authorHammer, Øyvind, committee member
dc.contributor.authorOlaussen, Snorre, committee member
dc.date.accessioned2024-05-27T10:32:44Z
dc.date.available2024-05-27T10:32:44Z
dc.date.issued2024
dc.description.abstractEvery rock has its own story. Rocks are categorized as igneous, metamorphic, and sedimentary types based on their origins and overprinting processes. The human species is confronting the crisis of climate change and some rocks hold a climate story from the past, permitting speculation on the future. On the geological time scale, Earth has experienced both scorching and freezing environments, the latter referred to as Snowball Earth. A critical key to resolving the problems we are facing lies in geology, which deconvolutes environments where specific rocks have formed. This dissertation addresses Boreal sedimentary sections during the Late Jurassic period by conducting three projects; Project I pinpoints depositional ages for black shales from the Agardhfjellet Formation and discusses Os isotopic ratios in the Boreal ocean during the Late Jurassic. Project II evaluates the depositional environments of the Agardhfjellet Formation, which was deposited during a shelf dysoxic-anoxic event. Project III focuses on Hg degradation incurred during incipient weathering and calls attention to interpreting Hg signals of sedimentary rocks, which have been used as an indicator of ancient volcanism. This dissertation provides new radiometric ages and detailed geochemical discussions of the Late Jurassic Agardhfjellet Formation and cautions the use of Hg concentrations when interpreting from outcrop sections. The findings herein significantly enhance our understanding of shelf dysoxic-anoxic events compared with oceanic anoxic events and Hg behavior during the early stage of weathering.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierPark_colostate_0053A_18177.pdf
dc.identifier.urihttps://hdl.handle.net/10217/238453
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2020-
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectblack shale
dc.subjectgeochronology
dc.subjectUpper Jurassic
dc.subjectgeochemistry
dc.subjectAgardhfjellet Formation
dc.subjectRe-Os
dc.titleRhenium-osmium geochronology and geochemistry of the Upper Jurassic marine black shales, Agardhfjellet Formation, Central Spitsbergen, Svalbard and mercury degradation of Upper Permian shales, East Greenland and mid-Norwegian shelf
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineGeosciences
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

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