Provenance and geochronology of Lomonosov Ridge: a contribution to the geology and tectonic history of the Arctic Ocean from dredged rock samples

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dc.contributor.advisor Pe-Piper, Georgia
dc.coverage.spatial Arctic Ocean
dc.creator Robertson, Logan Sidney
dc.date.accessioned 2024-03-26T11:28:58Z
dc.date.available 2024-03-26T11:28:58Z
dc.date.issued 2022-04-26
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/31895
dc.description 1 online resource (viii, 121, 847 unnumbered pages) : illustrations (some colour), maps (some colour), charts (some colour), graphs (some colour)
dc.description Includes abstract and appendices.
dc.description Includes bibliographical references (pages 111-121).
dc.description.abstract This thesis analyzes the OD2016-D2 dredge rock samples collected from a flank of Lomonosov Ridge, a major topographic feature in the Arctic Ocean. U-Pb- and Hf-isotopes were analyzed for 719 detrital zircon grains from ten sandstone samples using the Sensitive High-Resolution Ion Microprobe. The dredge rocks have similar detrital zircon U-Pb age distributions, a Neoproterozoic maximum depositional age, and Scandinavian provenance. Ten lithologies were defined from 176 samples and ten lithofacies from a selection of 96 samples to categorize the rocks and use as a basis for comparison. Two lithofacies associations are present: one indicates a tidal-influenced delta setting with fluvial input and the other indicates a tidal flat setting. The lithologies have similar heavy mineral assemblages, whole-rock geochemistry, and have a largely granitic component to their provenance. Overall, the results suggest that there are two Neoproterozoic units unconformably overlain by a possible Lower Paleozoic unit. en_CA
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dc.description.provenance Made available in DSpace on 2024-03-26T11:28:58Z (GMT). No. of bitstreams: 1 Robertson_Logan_MASTERS_2022.pdf: 63182920 bytes, checksum: 4052ee31e76d9879ed4832d85af7604c (MD5) Previous issue date: 2022-04-26 en
dc.language.iso en en_CA
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcsh Geochronometry -- Arctic Ocean
dc.subject.lcsh Arctic Ocean -- History
dc.subject.lcsh Tidal flats -- Arctic Ocean
dc.subject.lcsh Geology, Structural -- Arctic Ocean
dc.title Provenance and geochronology of Lomonosov Ridge: a contribution to the geology and tectonic history of the Arctic Ocean from dredged rock samples en_CA
dc.type Text en_CA
thesis.degree.name Master of Science in Applied Science
thesis.degree.level Masters
thesis.degree.discipline Geology
thesis.degree.grantor Saint Mary's University (Halifax, N.S.)
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