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SDLRC: Brooke Clements highlights technical diamond articles for January 2020


Sheahan Diamond Literature Reference Compilation
The Sheahan Diamond Literature Reference Compilation is compiled by Patricia Sheahan who publishes on a monthly basis a list of new scientific articles related to diamonds as well as media coverage and corporate announcements called the Sheahan Diamond Literature Service that is distributed as a free pdf to a list of followers. Pat has kindly agreed to allow her work to be made available as an online digital resource at Kaiser Research Online so that a broader community interested in diamonds and related geology can benefit. The SDLRC Blog is a guest commentary by an industry expert about articles, themes and trends in recent issues of the SDLRC.

January 2020

Comments by Brooke Clements

Brooke Clements received a B.Sc in Geology from Indiana University and an M.Sc in Economic Geology from the University of Arizona. From 1982 to 1997, he was an Exploration Geologist and Regional Manager for Exmin Corporation where he conducted diamond exploration programs throughout the United States. From 1998 to 2007 he was Vice President, Exploration for Ashton Mining of Canada Inc. Under his leadership, the Ashton-SOQUEM exploration team discovered the Renard diamond district in Quebec where Stornoway Diamonds opened the Renard Diamond Mine in 2016. From 2007 to 2015 he was President of Peregrine Diamonds Ltd. where he led the team that discovered the Chidliak diamond district on Baffin Island in the Canadian Arctic. Currently, Brooke is President of JBC Ventures Ltd., a consulting company specializing in mineral exploration and community and government relations. He is also President and CEO of Craton Minerals Ltd., a private diamond exploration company focused on discovering North America's next new diamond district.

Brooke Clements has volunteered to highlight the scientific articles that caught his attention in the monthly reference compilations. The opinions expressed are solely his and he can be reached at .

Technical Articles
Adding logic to luck: recent advances in coloured stone exploration in Canada. Groat, ID A good summary of coloured gemstone exploration and discovery in Canada. Because of the remoteness of most of the country, the relatively small size of the deposits and difficulties in recognizing deposits in the field, there have been very few coloured gemstone discoveries in Canada. Most of discoveries have been in the last 20 years. Most coloured gem deposits throughout the world are located in areas with relatively dense populations. The author has been involved in a number of Canadian programs and discoveries in remote areas. He makes a case that there is good potential to make new discoveries in Canada. Success will require: good prospectors, new technology like drones and efficient transportation methods in remote areas that are cheaper than helicopters.
Effect of shifting ice flow and basal topography in shaping three dimensional dispersal patterns , Lac de Gras region, Northwest Territories. Kelly et al., ID A common question pondered often by North American diamond explorers goes something like this: "Are there more new North American diamond districts to be found and are there any more world class pipes to be found within known North American districts?" Using indicator minerals as the primary tool, it's pretty clear to me that the easy districts and pipes have been found. The next generation of discoveries will require more detailed interpretation of complex glacial environments combined with geophysics. Ongoing studies by the NWT Geological Survey and several universities will undoubtedly assist with future interpretation of dispersal patterns. This paper illustrates that even in areas of shallow overburden, the indicator mineral story is more complex than it appears. Based principally on a grid of reverse circulation drilling, the authors reconstruct the indicator mineral dispersion patterns related to two famous NWT kimberlites located approximately 30 km southeast of the Diavik Diamond Mine, DO27 (Tli Kwi Cho) and DO18.
Diamond mining at Theindaw, Myanmar. Sun et al., ID This short paper reminds us that there are diamonds in Myanmar and other parts of Asia with no known sources. Diamonds in Myanmar are recovered as a by-product in alluvial tin and precious stone mining. The authors traveled to the remote Theindaw region and observed one such mining operation. Between 1985-1992 official government records document 1,458 carats of diamonds from the region with stones ranging in size from .02 to 72.85 carats. No official records of diamonds recovered in Myanmar have been kept since 2002.
The subglacial mosaic of the Laurentide ice sheet; a study of the interior region of southwestern Hudson Bay. Gauthier et al., ID This detailed Quaternary study of a region of northeastern Manitoba is a free download. It provides good guidance on how to attempt to unravel the glacial history and indicator mineral patterns in a complex glacial environment. The authors document ice flow from the east and from the north and west. Manitoba has seen a lot of diamond exploration activity over the last 30 years because of the presence of unexplained indicator mineral anomalies. So far, no kimberlites have been discovered. Adia Resources has sparked renewed interest in the diamond potential of the province with their Lynx project south of this study area, where they have identified a large highly diamondiferous ultramafic volcaniclastic deposit.

 
 

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