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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 2022
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 .
In her November newsletter, Pat referenced an impressive diamond-kimberlite session at the GAC-MAC annual meeting in London in November. Eleven talks from the session are referenced this month. The abstracts are in alphabetical order in the abstract volume. Four talks of note were: Grutter et al. on the lithosphere under the central Superior craton in Ontario, Pearson et al. revisited the craton concept and its relevance for diamond exploration, Podolsky outlined the process of defining diamond resources and reserves and Xu et al. described the age and provenance of the lithospheric mantle underneath the Chidliak diamond district in Nunavut.
NEW DIAMOND BOOKS
References to the following three new diamond books are provided.
Deljanin et al.:Diamonds - Natural, treated and laboratory grown
Newman:Diamonds: their history, sources, qualities and benefits
Vanneste:Blood, Sweat and Earth: The struggle for control over the world's diamonds through history
In November 1991, the discovery of the diamond-bearing Point Lake kimberlite in the NWT by the BHP-Dia Met-Fipke-Blusson joint venture was announced. The discovery triggered an unprecedented wave of diamond exploration in Canada and the world that helped shape many people's careers, including yours truly. In less than seven years, in 1998, the world class Ekati Diamond Mine went into production. This November, 30 years after the initial discovey, Rory Moore, CEO of Canadian Arctic Diamonds, provided an outlook on the future of Ekati at the Yellowknife Geoscience Forum. They have gone full-circle and are now in the final stages of permitting an open pit mine on the Point Lake pipe. They plan to begin a testing program in 2023 and 2024 of an underwater crawler mining system. Moore predicts that after the Point Lake pit is exhausted, Ekati will be focused exclusively on underwater mining of material from flooded pits.
Petrology-mineralogy studies of ilmenite-bearing xenoliths from the Grib kimberlite in northwestern Russia and laboratory reaction experiments between harzburgite and allikite-like silicate melts were completed. The authors postulate possible links between megacrysts and Ti-rich metasomatism of the lithospheric mantle by aillikite-related melts and potential evolution towards kimberlite magma. Figure 1 is a good map of the Eastern European craton showing kimberlite and reltated rocks.
