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Now showing items 1-11 of 11
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Depositional processes operating on the paleoproterozoic gowganda ice margin
(2014-01-22)Glacial sedimentary rocks of the Huronian Supergroup crop out along the north shore of Lake Huron and were likely deposited on what is thought to have been a divergent continental margin (Fralick and Miall, 1981; 1989). ... -
Diamondiferous mass-flow and traction current deposits in a Neoarchean Fan Delta, Wawa area, Superior Province
(2012-11-10)Diamond bearing Neoarchean metaconglomerates are present in the Michipicoten greenstone belt, Wawa-Abitibi subprovince near Wawa, Ontario. They form a portion of the Dore Metasedimentary rocks in the Arliss Lake subbasin, ... -
Environmental control of seawater geochemistry in a Mesoarchean Peritidal System, Woman Lake, Superior Province
(2020)The 2.857±5 Ga (this study) carbonate platform at Woman Lake, Ontario, Canada, presents a unique opportunity to fill a 130 million year knowledge gap on early carbonate sedimentology and ocean chemistry between similar ... -
Formational processes of recent, arsenic rich, ferromanganese lacustrine precipitates in Nova Scotia and Northern Ontario
(2014-01-22)Banded iron - and manganese - rich precipitates were collected from the lake bottoms of Lake Charlotte (Nova Scotia), Lake Shebandowan (Ontario) and Sowden Lake (Ontario). Investigations of study areas at the macro, meso ... -
Geochemistry of shallow and deep water archean meta-iron formations and their post-depositional alteration in western Superior Province, Canada
(2018)One purpose for studying banded meta-iron formations is to determine the chemical composition of seawater in the Archean ocean and the oxygen content of the Archean oceanic-atmospheric system. Geologists use the geochemistry ... -
Macro- and micro-structure comparison of ancient and modern iron-rich stromatolites
(2015)The Gunflint and Biwabik Formations comprise the middle units of the Paleoproterozoic Animikie Group that crop out near the northwestern shore of Lake Superior. Stromatolitic units were investigated and sampled at 9 outcrop ... -
Paleoproterozoic snowball earth? Sedimentology and geochemistry of a Huronian glacial cycle
(2019)The study discusses new sedimentological and geochemical results for the Paleoproterozoic Bruce glacial cycle, which represents the second of three glacial cycles within the Huronian Supergroup. This Bruce glacial event ... -
Quaternary sedimentology east of Thunder Bay, Ontario; implications for five Paleoindian sites
(2014-01-22)A geoarchaeological investigation was north of Highway 11/17, 34km east of Thunder Bay, Ontario. Five archaeological sites (Mackenzie 1, Mackenzie 2, RLF, Woodpecker 1, and Woodpecker 2) and seven additional sediment exposures ... -
Sedimentology and Geochemistry of Regressive and Transgressive Surfaces in the Gunflint Formation, Northwestern, Ontario
(2016)The 1.878 Ga Gunflint and equivalent iron formations of the Animikie Basin were deposited during the period after the rise in atmospheric oxygen during the Great Oxidation Event, which began at approximately 2.4 Ga. The ... -
Sedimentology and geochemistry of the 2.93 Ga Basinal Facies of the Red Lake carbonate platform
(2019)The Mesoarchean Red Lake carbonate platform is the oldest (~2.93 Ga) known carbonate platform on Earth. It is comprised of a variety of chemical sedimentary rocks including: limestone, dolostone, chert, oxide iron formation, ... -
Sedimentology and paleogeographic reconstruction of the strata in and adjacent to the Sudbury impact layer in the northern Paleoproterozoic Animikie basin
(2016)The Sudbury Impact Layer (S.I.L.) is dated at 1850 Ma and is located between the underlying Gunflint Formation, with an age of 1878±1 Ma that was obtained from zircons in a tuffaceous zone approximately 105 meters below ...