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SDLRC: Brooke Clements highlights technical diamond articles for October 2021

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.

October 2021

Comments by Brooke Clements

Brooke Clements is President and CEO of Craton Minerals Ltd., a Vancouver-based private diamond exploration company focused on discovering North America's next diamond district. He is also President of JBC Ventures Ltd., a consulting company specializing in mineral exploration and community and government relations. 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. Before that, Brooke was Vice President, Exploration for Ashton Mining of Canada Inc. Under his leadership, Ashton and their partner SOQUEM discovered the Renard diamond district in Quebec where the Renard Diamond Mine commenced production in 2016. From 1982 to 1997, Brooke was an Exploration Geologist and Regional Manager for Exmin Corporation where he conducted diamond exploration programs throughout the United States. He holds a BSc in Geology from Indiana University and an MSc in Economic Geology from the University of Arizona.

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
Alrosa has completed the first phase of a study into kimberlites' ability to absorb CO2 from the atmosphere ALROSA, ID Kimberlite tailings have been shown to be a great absorber of CO2 from the atmosphere. A team at the University of British Columbia has been working on it for a few years with some very good results. ALROSA has launched a two year study of the ability of kimberlite ore to capture and store CO2. They state that their kimberlites may be able to offset all of their carbon emissions.
Oceanic and super-deep continental diamond share a transition zone origin and mantle plume transportation Doucet et al., ID The authors use carbon isotopes to illustrate the similarities, and differences between oceanic and super-deep diamonds, and suggest that oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds.
Heat generation in cratonic mantle roots - new trace element constraints from mantle xenoliths. And implications for cratonic geotherms McIntyre et al., ID The radiogenic decay of K, U and Th to their daughter isotopes in mantle xenoliths is used to model heat production in the cratonic mantle lithosphere. The study suggests that the the cratonic lithosphere may be greater than 10 km thicker than that determined by previous models developed from the modeling of geothermal gradients.
Application of ground magnetic and soil geochemical surveys for mapping potential kimberlite bodies in the southern margin of the Archean Kaapvaal craton, South Africa Muavhi and Tessema, A., ID A case study of a kimberlite exploration program at the south margin of the Kaapvaal craton in South Africa. Major element geochemistry and geophysics are used to evaluate a group of kimberlite targets and one of them is interpreted as being a Group 1 kimberlite pipe.
Tectonic model for the Proterozoic growth of North America Whitmeyer and Karlstrom, ID In her travels through the literature this month, Pat unearthed a gem from 2007 describing the tectonic evolution of North America with strong emphasis on the Proterozoic. Accompanying that paper was a Powerpoint presentation and movie that illustrated the author's interpretation of the tectonic evolution of North America from the Archean to the present in time slices. Many people I know have used that paper and presentation as a tool to understand big picture North American tectonic evolution.


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