 | | Journal (issue) | | FEATURE ARTICLE______________ 208 Diamonds in Canada B. A. Kjarsgaard and A. A. Levinson This article...News International • Australia’s Ellendale diamond mine opens • Aquamarine and spessartine from Tanzania...from the Erongo Mountains, Namibia • New morganite mine in Madagascar • Namibian gem localities • New opals...Massachusetts A. A. Levinson Calgary, Alberta, Canada Christopher P. Smith Lucerne, Switzerland Editor...still a newcomer as a supplier of rough diamonds, Canada is now among the world’s most important diamond |  | | Journal (issue) | | GEMOLOGICAL INSTITUTE OF AMERICA Canada’s Diavik Mine Fabergé Imperial Bodyguards Responsible Sourcing...of Colored Stones Journey to the Chivor Emerald Mine Summer 2016 VOLUME 52, No. 2 EDITORIAL 103 Responsible...Mining Diamonds in the Canadian Arctic: The Diavik Mine James E. Shigley, Russell Shor, Pedro Padua, Christopher...Rainier’s Footsteps: Journey to the Chivor Emerald Mine Robert Weldon, Jose Guillermo Ortiz, and Terri Ottaway...adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory |  | | Journal (article/letter/editorial) | | Engineering, Queens University, Kingston, Ontario, Canada K74 3N6 of Terrestrial Magnetism, Carnegie Institution...population of xenocrystic diamonds contributing to run-of-mine production. Evidence is accumulating that the diamond-forming...= Premier representing oldest Group I kimberlite mine (filled diamond), increasing thickness of solid...peridotitic and eclogitic affinities are found together (De Stefano et al., 2006). 0361-0128/98/000/000-00 $6...greenstone belt southeast of Baker Lake, Nunavut, Canada. It overlaps in age with the 1.84 to 1.83 Ma Christopher |  | | Journal (article/letter/editorial) | | from Canada Downloaded by [Florida International University] at 19:52 23 August 2013 C anada is home...from emerald to sapphire, Canada has it all. Yet, for most of its history, Canada has been regarded as a...species have been found at one time or another in Canada (fig. 1). Some gem localities, such as those for...S. WILSON PO Box 352 Kingston, Ontario K7L 4W2 Canada brad@alpinegems.ca 96*2: 405,9(3: The...the emerging diamond mining industry has turned Canada into a gemproducing giant. Possibly encouraged |  | Kilgore, McKensie L., Peslier, Anne H., Brandon, Alan D., Schaffer, Lillian A., Morris, Richard V., Graff, Trevor G., Agresti, David G., O'Reilly, Suzanne Y., Griffin, William L., Graham Pearson, D., Gangi, Kelsey, Shaulis, Barry J. (2020) Metasomatic control of hydrogen contents in the layered cratonic mantle lithosphere sampled by Lac de Gras xenoliths in the central Slave craton, Canada. Geochimica et Cosmochimica Acta, 286. 29-53 doi:10.1016/j.gca.2020.07.013 | Journal (article/letter/editorial) | | lithosphere sampled by Lac de Gras xenoliths in the central Slave craton, Canada McKensie L. Kilgore, Anne...lithosphere sampled by Lac de Gras xenoliths in the central Slave craton, Canada, Geochimica et Cosmochimica...lithosphere sampled by Lac de Gras xenoliths in the central Slave craton, Canada McKensie L. Kilgorea,...Sciences, University of Alberta, Edmonton, Alberta, Canada fTrace Element and Radiogenic Isotope Lab, University...orthopyroxene, clinopyroxene and garnet from Lac de Gras peridotite xenoliths contain 29 - 146, 109 – |  | | Journal (article/letter/editorial) | | phlogopite, carbonate, serpentine, locality in Canada) (Fig. 1C). In melt inclusions contrast to hypabyssal...of Geology Lakehead University Ontario, P7B 5E1, Canada E-mail: rmitchel@lakeheadu.ca PETROGRAPHY OF HYPABYSSAL...Hypabyssal kimberlite from Batty Bay (Somerset Island, Canada) that contains abundant olivine macrocrysts (oliv...pyroclastic kimberlite from Candle Lake (Saskatchewan, Canada) that contains dark lobate magmaclasts (M) and...(from lherzolites), red Ti-pyrope and orange almandine garnet (from eclogites), Mg-ilmenite, Cr–Al-spinel |  | | Report (chapter) | | for diamond exploration in glaciated terrain in Canada M. B. McClenaghan and B. A. Kjarsgaard Geological...in Canada M. B. M c C L E N A G H A N & B. A. K J A R S G A A R D Geological Survey o f Canada, 601...601 Booth Street, Ottawa, Ontario K 1 A OE8, Canada (e-mail: bmcclena@nrcan.gc.ca) Abstract: This paper...exploration techniques used in the glaciated terrain of Canada, focusing on indicator mineral methods and till...sediments and vegetation. Diamond exploration in Canada focuses on kimberlite, the primary host rock for |  | | Journal (issue) | | Switzerland A. A. Levinson Calgary, Alberta, Canada James E. Shigley Carlsbad, California C. S. Hurlbut...Department, and Mr. Cooper is research director, at De Beers DTC Research Centre, Maidenhead, United Kingdom...among the rarest of gems (Federman, 1989, 1998). The De Beers Polished Division, in their published compilation...with the current mining recovery rate. Of all the De Beers South African rough production, there is on...excitement along the chain from the discovery at the mine to the sorting” (M. Semple, pers. comm., 1998). |  | | Journal (article/letter/editorial) | | diamonds from the Panda kimberlite (Ekati Mine, Northwest Territories, Canada) in which both mineral and fluid...2004) and from the Superior and Slave Cratons, Canada (Miller et al., 2014; Tomlinson et al., 2006)....erupted into the Archean Slave Craton, Northwest Territories, Canada. The kimberlite eruption age is dated...of peridotite xenoliths from the Diavik diamond mine in the same province as the Panda kimberlite showed...fayalite, 11 enstatite, ferrosilite, pyrope, almandine, and grossular, respectively (Whitney and Evans |  | | Journal (article/letter/editorial) | | olivine, 76 ppm, 0.19%; Fe (almandine, 315 ppm, 1.57%), Al (almandine, 66 ppm, 45.9%); Ca (Cr-diopside...Hetman et al (2004) from the Gahcho Kué kimberlites (Canada). Segregations dominated by carbonate, which are... 2010 (Greenland) and Bussweiler et al., 2015 (Canada)). While the large Colossus olivines collectively... 2003) kimberlites, located in the south and northwest of the Zimbabwe craton respectively. T Smith...(Siberian craton, CE P Sobolev et al., 2009) and the Ekati kimberlites (Slave craton, Menzies, et al., 2004) |  | | Journal (article/letter/editorial) | | Queen’s University, Kingston, Ontario K7L 3N6, Canada John J. GURNEY and Stephen H. RICHARDSON Department...d’inclusions syngénétiques de minéraux provenant de péridotites (de type P) et d’éclogites (de type E) dans le diamant...diamant montrent que les épisodes de formation du diamant dans la lithosphère subcontinentale coïncident...majeur, à environ 3.5 ou 3.2 Ga, suit de près la formation de racines stériles sous les noyaux continentaux...épisode de métasomatose enclenché par des fluides riches en CO2, probablement liés à une zone de subduction |  | | Journal (issue) | | gemological description Variety of orange-brown almandine-pyrope garnets Plastic impregnated and dyed to...his observations on the new laser treatment with De Beers. Meanwhile, in 1970 General Electric announced...town near Atlanta, Georgia, or some hamlet up in Canada near Toronto, what the gem experts were talking...pp. 698–705. Gruosi F. (1999) The Black Diamond. De Grisogono, Geneva, 72 pp. Harris J.W. (1992) Diamond...diamond treatment by “internal” graphitization. Revue de Gemmologie, Nos. 145/146, pp. 42–60. Novikov N.V |  | Milani, S., Nestola, F., Alvaro, M., Pasqual, D., Mazzucchelli, M.L., Domeneghetti, M.C., Geiger, C.A. (2015) Diamond–garnet geobarometry: The role of garnet compressibility and expansivity. Lithos, 227. 140-147 doi:10.1016/j.lithos.2015.03.017 | Journal (article/letter/editorial) | | Available online 30 March 2015 Keywords: Pyrope Almandine Bulk modulus Thermal expansion Diamond Entrapment...the P–V EoS for synthetic single crystals of almandine (Alm, Fe3Al2Si3O12) as well as an intermediate...Å3, KT0 = 172.6(1.5) GPa and K′ = 5.8(5) for almandine and V0 = 1516.32(13) Å3, KT0 = 167.2(1.7) GPa...composition. The unit-cell volume along the pyrope–almandine join changes linearly within the error of measurement...and are composed of more than 90% pyrope and almandine components, S. Milani et al. / Lithos 227 (2015) |  | | Journal (article/letter/editorial) | | eight coated diamonds from the Panda kimberlite (Canada). The mineral inclusions in the diamond coats come...fibrous coats of diamonds from the Panda kimberlite (Canada). The conditions of diamond growth, such as temperature...clinopyroxene, Mg-chromite), eclogitic (pyrope–almandine garnet and omphacitic clinopyroxene, coesite,...fluid in a fibrous diamond coat from the Diavik Mine (Canada) range in composition from Na–K–Cl brine to...diamonds from Africa [1,2] (open squares) and Diavik (Canada) [6] (open triangles) and cloudy diamonds from |  | | Journal (issue) | | opal • Chinese akoya cultured pearls • Pyrope-almandine from Tanzania • Pink-to-red tourmaline from Myanmar...to 18 ct. Courtesy of H. Stern, New York and Rio de Janeiro. Photo © Harold & Erica Van Pelt. Color separations...Institut des Matériaux Jean Rouxel (IMN) Université de Nantes, France Emmanuel Fritsch, IMN Reply: We want...diamonds of cube and cuberelated shape from the Jwaneng mine,” Journal of Crystal Growth, Vol. 94, 1989, pp....has been more recently reviewed in an article of mine (B. Rondeau et al., “Diamants cubiques et presque |  | Smart, K.A., Tappe, S., Simonetti, A., Simonetti, S.S., Woodland, A.B., Harris, C. (2017) Tectonic significance and redox state of Paleoproterozoic eclogite and pyroxenite components in the Slave cratonic mantle lithosphere, Voyageur kimberlite, Arctic Canada. Chemical Geology, 455. 98-119 doi:10.1016/j.chemgeo.2016.10.014 | Journal (article/letter/editorial) | | mantle lithosphere, Voyageur kimberlite, Arctic Canada K.A. Smart, S. Tappe, A. Simonetti, S.S. Simonetti...mantle lithosphere, Voyageur kimberlite, Arctic Canada, Chemical Geology (2016), doi: 10.1016/j.chemgeo...mantle lithosphere, Voyageur kimberlite, Arctic Canada PT Smart, K.A.1*, Tappe S.2, Simonetti A.3, Simonetti...kimberlite on the northern Slave craton in Arctic Canada were studied for garnet and clinopyroxene major...xenoliths from 174 Ma Voyageur  MA kimberlite, Canada Cratonic eclogite suite has 2.1 Ga basaltic and |  | | | | in the field ~“ Various geological locations iin Canada© Physical properties of minerals and rocks, and...surrounded ce ne white calcite, from!iheBluebell Mine; Riondel, Digitized by the Internet Archive...Fitzhenry & Whiteside Canadian Museum of Musée canadien de la Saad @./ NATURE Beginner’s Guide to Rocks and...Fitzhenry & Whiteside acknowledges with thanks the Canada Council for the Arts, and the Ontario Arts Council...acknowledge the financial support of the Government of Canada through the Book Publishing Industry Development |  | | Journal (article/letter/editorial) | | et al., in press), and apatite from garnet (e.g. Ekati, Slave craton and Koidu, West African craton; Haggerty...mantle eclogites are Cr-poor pyrope – grossular –almandine mixtures with wide variations in grossular-contents...Eclogites from the Slave craton (Jericho and Ekati/Lac de Gras pipes) Fig. 12. Lead isotopic compositions...oceanic crust. Eclogites from the Roberts Victor mine show the widest range of d18O-values from 2.5x to...et al., 1997; Koidu: Barth et al., 2001, 2002b; Ekati: Jacob et al., 2003a; Aulbach, 2003.) (Fig. 14) |  | Harris, Garrett A., Pearson, D. Graham, Liu, Jingao, Hardman, Matthew F., Snyder, David B., Kelsch, Dave (2018) Mantle composition, age and geotherm beneath the Darby kimberlite field, west central Rae Craton. Mineralogy and Petrology, 112. 57-70 doi:10.1007/s00710-018-0609-4 | Journal (article/letter/editorial) | | Nature 2018 Abstract The Rae Craton, northern Canada, contains several diamondiferous kimberlite fields...defined by new seismic studies. Keywords Northern Canada . Peridotite . Pyroxenite . Xenolith . Kimberlite...Earth Sciences Building, Edmonton, AB T6G 2E3, Canada 2 China University of Geosciences, 29 Xue Yuan...University, 935 Ramsey Lake Road, Sudbury, ON P3E 2C6, Canada 4 Bluestone Resources Inc., Suite 1020 – 800...Street, Vancouver, BC V6C 2V6, Canada The Rae Craton of northern Canada is an extensive but complex crustal |  | | Journal (issue) | | Carlsbad, California A. A. Levinson Calgary, Alberta, Canada Thomas M. Moses New York, New York Kurt Nassau...diamonds from the Ekati mine, in the bitter cold of Canada’s Northwest Territories. Photo © Jiri Hermann;...future potential. The new Ekati mine in Canada’s frigid Northwest Territories, Namdeb’s production offshore...the mining companies to develop and economically mine increasingly hard-to-access diamonds. Technology...diamond (995.20 cts) ever found at the Jagersfontein mine. The bracelet was on view in the Nature of Diamonds |  | Van Rythoven, A.D., Schulze, D.J., Hauri, E.H., Wang, J., Shirey, S. (2017) Intra-crystal co-variations of carbon isotopes and nitrogen contents in diamond from three North American cratons. Chemical Geology, 467. 12-29 doi:10.1016/j.chemgeo.2017.06.027 | Journal (article/letter/editorial) | | 22 Russell Street, Toronto, Ontario, M5S 3B1, Canada. AN 3. Carnegie Institution of Washington – Department...South kimberlite pipe (Diavik Mine), Slave Craton, Northwest Territories (Canada); sixteen diamond samples... CE kimberlite dyke, Superior Craton, Quebec (Canada) and twelve diamond samples from the Kelsey Lake...Schulze et al., 2004; Craven et al., 2009; Wiggers de Vries CR et al., 2013) may be missed. This trend...pipe at the Diavik Diamond Mine, Slave Craton, Northwest Territories, Canada; the Lynx dyke (adjacent to |  | | Journal (article/letter/editorial) | | within the Premier diatreme root (Cullinan Diamond Mine, South Africa): New insights to mineralogical-genetic...within the Premier diatreme root (Cullinan Diamond Mine, South Africa): New insights to mineralogical-genetic...within the Premier diatreme root (Cullinan Diamond Mine, South Africa): New insights to mineralogical-genetic... (Bartlett, 1994; Tappe et al., 2018a). Premier Mine, which has operated intermittently IP since 1903...1903 and was renamed to Cullinan Diamond Mine in 2003, holds several records; CR for example, the largest |  | | Journal (article/letter/editorial) | | Geoscience, University of Calgary, Calgary, Alberta, Canada T2N 1N4 a r t i c l e i n f o Article history:...km and 200 km, below the Lac de Gras region of Slave craton (northern Canada) and below the Kimberley...and garnet ranges from pyrope (Mg# of 100) to almandine (Mg# of 0). For our purposes we consider Mg#s...compositional range from pyrope (100% Mg) to almandine (100% iron). Below we list the parameters for...Romano et al.'s (2006) data for the two pyrope-almandine garnets Py100 (H1741, Mg# of 100) and Py85Alm15 |  | Gress, Michael U., Howell, Daniel, Chinn, Ingrid L., Speich, Laura, Kohn, Simon C., van den Heuvel, Quint, Schulten, Ellen, Pals, Anna S. M., Davies, Gareth R. (2018) Episodic diamond growth beneath the Kaapvaal Craton at Jwaneng Mine, Botswana. Mineralogy and Petrology, 112. 219-229 doi:10.1007/s00710-018-0582-y | Journal (article/letter/editorial) | | diamond growth beneath the Kaapvaal Craton at Jwaneng Mine, Botswana Michael U. Gress 1 & Daniel Howell 1,2...Michael U. Gress m.u.gress@vu.nl 1 Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, The Netherlands...University of Alberta, Edmonton, AB T6G 2E3, Canada 3 De Beers Exploration, Johannesburg, South Africa...recorded in the mantle beneath an individual diamond mine and the scale of these events, remains unknown....Re-Os isochron ages (Pearson et al. 1998; Wiggers de Vries et al. 2013). Initial attempts have also been |  | | Journal (issue) | | Switzerland A. A. Levinson Calgary, Alberta, Canada Editor, Gemological Abstracts A. A. Levinson ...can compare to the fundamental shift in the role of De Beers from custodian of global diamond supply to...economic and geopolitical forces Shor describes, De Beers abandoned the philosophy that had guided the...fact that the De Beers brand name is now reserved for its retail partnership with LVMH (De Beers LV) is...the arrival of new sources such as Australia and Canada—led to the restructuring of the rough diamond market |
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