 | Creaser, Robert A., Grütter, Herman, Carlson, Jon, Crawford, Barbara (2004) Macrocrystal phlogopite Rb–Sr dates for the Ekati property kimberlites, Slave Province, Canada: evidence for multiple intrusive episodes in the Paleocene and Eocene. Lithos, 76 (1) 399-414 doi:10.1016/j.lithos.2004.03.039 | Journal (article/letter/editorial) | | phlogopite Rb–Sr dates for the Ekati property kimberlites, Slave Province, Canada: evidence for multiple intrusive...Alberta, 126 ESB, Edmonton, AB, Canada T6G 2E3 b Mineral Services Canada, 205-930 Harbourside Drive, North...Vancouver BC, Canada V7P 3S7 c BHP Billiton Diamonds Inc., #8-2604 Enterprise Way Kelowna BC, Canada V1X 7Y5...kimberlites from the Ekati property of the Lac de Gras region, Slave Province, Canada. These new data show...show that kimberlite magmatism at Ekati ranges in age from at least Late Paleocene ( f 61 Ma) to Middle |  | Nowicki, Tom, Crawford, Barbara, Dyck, Darren, Carlson, Jon, McElroy, Ross, Oshust, Peter, Helmstaedt, Herb (2004) The geology of kimberlite pipes of the Ekati property, Northwest Territories, Canada. Lithos, 76 (1) 1-27 doi:10.1016/j.lithos.2004.03.020 | Journal (article/letter/editorial) | | of kimberlite pipes of the Ekati property, Northwest Territories, Canada Tom Nowicki a,*, Barbara Crawford...Mineral Services Canada Inc., 205-930 Harbourside Drive, North Vancouver, BC, Canada V7P3S7 b BHP Billiton...Kelowna, Canada c BHP Billiton Diamonds Inc., Yellowknife, Canada d Queens University, Kingston, Canada Received...characteristics of kimberlites on the Ekati property, NWT, Canada. To date 150 kimberlites have been discovered...m) was present at the time of emplacement. The Ekati kimberlites range in age from 45 to 75 Ma. They |  | | Journal (issue) | | FEATURE ARTICLE______________ 208 Diamonds in Canada B. A. Kjarsgaard and A. A. Levinson This article...article chronicles the history of Canadian diamond exploration, with particular attention given to key discoveries...as well as Canada’s growing impact on the world diamond market. pg. 206 NOTES AND NEW TECHNIQUES __________... natural inclusions in fancy-color diamonds • Diamond with “compact disc” inclusion • Hemimorphite •...Gem News International • Australia’s Ellendale diamond mine opens • Aquamarine and spessartine from Tanzania |  | | Journal (article/letter/editorial) | | kimberlite volcanic activity in the Lac de Gras kimberlite field, Canada and some recommendations for kimberlite...kimberlite volcanic activity in the Lac de Gras kimberlite field, Canada and some recommendations for kimberlite...VOLCANIC PT ACTIVITY IN THE LAC DE GRAS KIMBERLITE FIELD, RI CANADA AND SOME RECOMMENDATIONS FOR ...of Alberta, Edmonton, T6G MA 1 * TE D 2E3, CANADA Corresponding author (chiranjeeb.sarkar@ualberta...kimberlites has played a key role in diamond exploration within the Lac de Gras kimberlite field. Nonetheless |  | | Journal (article/letter/editorial) | | Edmonton, Alberta, Canada T6G 2E3 b Geological Survey of Canada, Ottawa, Canada K1A 0E8 Received 21...region of Ontario to Eocene kimberlites in the Lac de Gras field, N.W.T. Based on a compilation of more...more than 4000 km from Somerset Island in northern Canada through the Fort à la Corne field in Saskatchewan...approximately 50. The discovery of significant diamond-bearing kimberlite in North America ( f 1991) has...for kimberlites and related rocks, especially in Canada. The number of new kimberlite discoveries continues |  | | Journal (article/letter/editorial) | | fine-quality diamonds on kimberlite. Photo courtesy Aber Diamond Inc. WARREN F. BOYD R. T. Boyd Limited Suite 546...546, 109 Thomas Street Oakville, Ontario Canada L6J 7R4 diamondswfb@cs.com I n the early 1980s, when...the Figure 2. Canadian diamond mines (Ekati and Diavik) and future diamond mines (Jericho, Snap Lake...20:04 22 August 2013 Figure 3. The Ekati Diamond mine—Panda pit. Photo courtesy BHP Billiton. world...discovery of diamonds in the Northwest Territories in the far north of Canada in 1991 led to the largest |  | | Journal (issue) | | FEATURES 130 Gem Trade Lab Notes • “Banded” twinned diamond crystal • Diamonds with unusual inclusions • Feldspar...cut • Canadian diamonds • PDAC conference • A diamond table with trigons • “Burmite” • Cat’s-eye amethyst...pyrochlore inclusions • Vortex (Yogo Gulch) sapphire mine update • “Canary” tourmaline from Malawi • Bismuth-bearing...• “Jurassic Bugs” amber imitation • Assembled diamond imitations from Brazil • Enamel-backed quartz as... Switzerland A. A. Levinson Calgary, Alberta, Canada Christopher P. Smith Lucerne, Switzerland C. |  | | Journal (issue) | | Switzerland A. A. Levinson Calgary, Alberta, Canada James E. Shigley Carlsbad, California C. S. Hurlbut...(“Modeling the Appearance of the Round Brilliant Cut Diamond: An Analysis of Brilliance,” by T. S. Hemphill...set of input ray incident angles to the modeled diamond, each emanating from the hemisphere’s internal...internal surface. The amount of light entering the diamond (that which can potentially contribute to WLR) is...three-dimensional analysis of the appearance of a diamond. Mr. Haske states that he examined our results |  | | Journal (issue) | | Circle No. 1 on Reply Card ;\ ,, A Canadian Diamond Marketing Company On the Road , Circle No. 2...Co1nmittee (ASTC), from open data standards, to mine-tomill integration, to underground communications...Metallurgy and Petroleum Xerox Tower, 1210, 3400 de Maisonncuve Blvd., W. Montreal, Quebec H.32 3B8 Tel...discussion appeanng m its pubhcat1ons. Pnmed 111 Canada 4 Newfoundland········· ····················...16 17 17 FEATURES Canadian Dia1nond Industry Diamond fever. ........... ........................... |  | | Journal (issue) | | Cubic zirconia (CZ), is one of the most serious diamond impostors today. It is rare that a well-made ring...One such is described. Keywords: cubic zirconia, diamond simulant Introduction 10 8 Recently the author...seemed to be a cushion-shaped fancy light yellow diamond circled by 16 brilliant-cut diamonds (Figure 1)...and calculated weights that the stone was not a diamond, but the testing procedure was continued. Under...These properties do not correspond with those of diamond but are consistent with the published values for |  | | Journal (issue) | | SOURCES DIAMOND MANUFACTURING & DISTRIBUTION DIAMOND ECONOMICS PERSPECTIVES ON THE DIAMOND MARKET ...Janse Canadian Diamond Production: A Government Perspective 40 Douglas Paget Russian Diamond Sources 43 N...V. Sobolev The New York Diamond Market 44 Hertz Hasenfeld The Antwerp Diamond Sector 46 Marcel Pruwer...Challenges and New Developments 47 M. A. Mitchell Diamond Manufacturing and Distribution: The Israeli Perspective...International Economic Developments on the Diamond Market 50 Carl Pearson Diamond Economics: A Dynamic Analysis 51 |
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