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Skip to Search Results- 17Graduate and Postdoctoral Studies (GPS), Faculty of
- 17Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 6Earth and Atmospheric Sciences, Department of
- 4Earth and Atmospheric Sciences, Department of/Research Materials (Earth and Atmospheric Sciences)
- 2Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Canadian Centre for Isotopic Microanalysis (CCIM)
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Age, origin and composition of the Attawapiskat lithospheric mantle and its diamonds (western Superior craton, Canada)
DownloadFall 2013
This study reports results from peridotitic and eclogitic xenoliths and di- amond samples from the Attawapiskat area to understand the processes of craton formation and modification in the Superior lithospheric mantle. These diamondiferous kimberlites also provide an opportunity to study the...
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Aviat diamonds: a window into the deep lithospheric mantle beneath the Northern Churchill Province
DownloadFall 2012
The northern Churchill Province is an intensely explored, yet poorly researched target area for diamonds. I examined the mantle sources and residence history of diamonds from Aviat, located on the Melville Peninsula. Aviat diamonds display a δ13C range extending far below the average mantle value...
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Biogenic and Abiotic Carbonates in Altered Oceanic Crust (AOC) and Implications to Subduction Zone Carbon Cycle
DownloadFall 2017
Altered oceanic crust (AOC) is an important carbon reservoir for subduction-zone carbon recycling. However, the character of the carbon reservoir (e.g., total budget and isotopic signatures) in AOC has not been well constrained. Here, based on analyses of contents and isotope compositions of 73...
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Carbon and nitrogen isotope systematics in diamond: Different sensitivities to isotopic fractionation or a decoupled origin?
Download2016-11-16
Hogberg, Katie, Stachel, Thomas, Stern, Richard A.
Using stable isotope data obtained on multiple aliquots of diamonds from worldwide sources, it has been argued that carbon and nitrogen in diamond are decoupled. Here we re-investigate the carbon–nitrogen relationship based on the most comprehensive microbeam data set to date of stable isotopes...
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Cathodoluminescence images of Koidu diamonds
2022-09-01
Cathodoluminescence images of Koidu diamonds
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Fall 2011
The Renard kimberlites (52°48’26N, 72°14’52W: Quebec, Canada) are typical for primary diamond deposits: being located within Archean basement (Superior craton). Pb-Pb isotope data of clinopyroxenes also suggests an Archean age (~2.7Ga) for the subcratonic lithospheric mantle (SCLM). The Carolina...
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Descriptions of Koidu diamonds and their mineral inclusions
2022-09-01
Descriptions of Koidu diamonds and their mineral inclusions
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Diamond sources beneath the Hall Peninsula, Baffin Island, Nunavut: A preliminary assessment based on Chidliak diamonds
DownloadSpring 2014
Diamonds from the Chidliak kimberlite field, located on the Hall Peninsula of Baffin Island, are the focus of this study. Morphology, carbon and nitrogen isotopic compositions, and nitrogen characteristics of Chidliak diamonds are used to constrain diamond sources, and conditions of diamond...
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Fall 2013
Monocrystalline gem-quality diamonds from Akwatia, Ghana and De Beers Pool, South Africa have trace-element concentrations ranging from ppt to ppm levels, but mostly are below the limit of quantification. CeN/EuN (1–6; N = chondrite normalized) and CeN/TiN (0.6 to 12) indicate mildly elevated...
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Evaluation of seed hardness and malting characteristics of barley grain for use in ruminant diets
DownloadSpring 2015
In Western Canada, over 70% of the barley grain grown for malt is sold as livestock feed. The main objective of this thesis was to investigate the relationship between ruminal dry matter digestibility (DMD) and seed hardness (SH) and malting characteristics (MC) of barley grain by measuring in...