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- 4Stern, Richard A.
- 3Pearson, Graham
- 2Bussweiler, Yannick
- 2Hardman, Matthew
- 1Brey, Gerhard Peter
- 4Earth and Atmospheric Sciences, Department of
- 4Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 1Canadian Centre for Isotopic Microanalysis (CCIM)
- 1Canadian Centre for Isotopic Microanalysis (CCIM)/Laboratory Research and Technical Material (CCIM)
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- 1Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
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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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Formation of mixed paragenesis diamonds during multistage growth – constraints from in situ δ 13C–δ 15N–[N] analyses of Koidu diamonds
Download2022-01-01
Lai, Mei Yan, Stachel, Thomas, Stern, Richard A., Hardman, Matthew F., Pearson, D. Graham, Harris, Jeff W.
Abstract Inclusion-bearing diamonds from the Koidu kimberlite complex, Sierra Leone (West African Craton) were analyzed in situ for carbon and nitrogen isotope compositions, nitrogen concentrations and nitrogen aggregation states. In a suite of 105 diamonds, 78% contain eclogitic mineral...
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Improving the use of eclogitic garnet as a diamond indicator mineral, and constraining the origin of eclogites in the subcontinental lithospheric mantle
DownloadSpring 2020
Diamond occurs in the subcontinental lithospheric mantle (SCLM) and is transported to the surface by kimberlite-lamproite volcanism and other deeply-derived volcanic rocks. In the SCLM diamond is often hosted by peridotitic or eclogitic substrates. Even when it occurs in economic abundances in a...
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2014-05-19
This report describes the methods and samples utilized (to 2014) within the Canadian Centre for Isotopic Microanalysis (CCIM), University of Alberta, for routine analysis of δ13CVPDB, δ15NAIR, and N abundances of diamonds by secondary ion mass spectrometry (Cameca IMS 1280). Analyses by...
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The aluminum-in-olivine thermometer for mantle peridotites — Experimental versus empirical calibration and potential applications
Download2017-02-01
E. Jackson, Simon E., Bussweiler, Yannick, Hardman, Matthew, Stern, Richard A., Brey, Gerhard Peter, Kjarsgaard, B.A., Pearson, Graham, Stachel, Thomas
This study provides an experimental calibration of the empirical Al-in-olivine thermometer for mantle peridotites proposed by De Hoog et al. (2010). We report Al concentrations measured by secondary ion mass spectrometry (SIMS) in olivines produced in the original high-pressure, high-temperature,...
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The evolution of calcite-bearing kimberlites by melt-rock reaction: evidence from polymineralic inclusions within clinopyroxene and garnet megacrysts from Lac de Gras kimberlites, Canada
Download2016-07-01
Luth, R. W., Stone, Rebecca, Menzies, Andrew, Bussweiler, Yannick, Pearson, Graham, Stachel, Thomas, Kjarsgaard, B. A.
Megacrystic (>1 cm) clinopyroxene (Cr-diopside) and garnet (Cr-pyrope) xenocrysts within kimberlites from Lac de Gras (Northwest Territories, Canada) contain fully crystallized melt inclusions. These ‘polymineralic inclusions’ have previously been interpreted to form by necking down of melts at...