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SDLRC Blog: Brooke Clements highlights technical articles for April 2018

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.

April 2018

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
Improving evaluation methods for production capacity and life of open pit diamond mines Akishev et al., ID This article addresses economic optimization of open pit diamond mines in Arctic Russia. ALROSA's perspective should be interesting; I believe they have the deepest open pit mines on the planet. It is critical to have a fundamental understanding of the potential economics of open pits on kimberlites at the early stage of kimberlite evaluation.
Articles on the Argyle and Merlin Mines, Australia Boxer et al. and Reddicliffe and Kammerman, ID The +800 page Monograph published in 2017 by the AUSIMM documents famous Australian ore deposits and appears to be a worthwhile reference for explorationists. There are many famous type localities described including two summaries of diamond deposits, Argyle and Merlin. This monograph needs to be purchased to be viewed.
Diavik's Foxfire diamond revisited Butler et al., ID This short paper on Foxfire, Canada's most famous rough diamond is a free download and worth checking out for the pictures.
Inversion of airborne geophysics over the DO-27/DO-18 kimberlites. Part 1. Potential field Devries et al., ID DO27 Kimberlite, Northwest Territories, Canada: DO27 is a famous (maybe infamous) kimberlite. Many of us remember the day in 1994 when disappointing diamond results were reported for a 3,000 tonne bulk sample collected from DO-27 by Kennecott, as the day the junior diamond exploration market died. Programs conducted by Peregrine Diamonds Ltd. from 2005-2007 returned better diamond results and extensive core drilling helped develop a good understanding of the pipe geology. Several years ago, Doug Oldenburg, Professor of Geophysics at the University of British Columbia assembled a group of students and professors in a working group. The group studied and performed inversions on all available geophysical data from the DO-27 and DO-18 kimberlite complex and compared the results with the geologic models and drill data. I was fortunate to interact with this dynamic group. As I remember it, they had three objectives: 1) See how well the geophysics reflects the known geology, 2) See if the geophysics points to areas that might warrant exploration, and 3) Look at it as a geophysical case study that might optimize geophysical methods in kimberlite exploration in the future. One conclusion is that ground geophysics may not be necessary if airborne geophysical data is analyzed properly. All 3 of the papers were published by the Society of Exploration Geophysicists in 2017 and they are free to download.
Inversion of airborne geophysics over the DO-27/DO-18 kimberlites. Part 2. Electromagnetics Fournier et al., ID
Inversion of airborne geophysics over the DO-27/DO-18 kimberlite. Part 3. Induced polarization Kang et al., ID
Quaternary glaciation of the Great Lakes Region Kehew and Curry, eds., ID The abstracts from this collection of papers on glacial geology describe complicated glacial processes and illustrate how confusing the signs left behind by the glaciers can be to those of us crazy enough to try to make a living trying to find the source of indicator minerals in glacial terrane. We sure have learned a lot about glacial processes and indicator mineral dispersions in Canada since 1991.
Naming of the Kohi-Noor and the origin of the Mughal-cut diamonds Malecka, ID I flag this article about a famous diamond from India because I find the early history of gemstones fascinating.
4th International Diamond School Held Jan 29-Feb 2, 2018 in Bressanone, Italy The April issue has references to some of the 18 talks by prominent diamond researchers at the 4th International Diamond School for which there are currently no online links or abstracts. The School was held in Padova, Italy in early 2018. All of the titles look interesting, if you know anyone who attended, you should see if there is any written material available.


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