Distinguished Speaker Dr. Bruce Kjarsgaard Unearths "Kimberlite Hosted Diamond Fields" This Week

  • Oct 13, 2018

Our Distinguished Speaker this week is Dr. Bruce Kjarsgaard, Senior Research Scientist at the Geological Survey of Canada.

“The Kimberlite-hosted Diamond Fields of Canada”

A newcomer (since 1998) as a supplier of gem quality rough diamonds to the world market, Canada is the third most important diamond producer (by value) in the world, based on the output of the world class Ekati, Diavik, Gahcho Kué diamond mines in the Northwest Territories, the Victor Mine in northern Ontario, and the Renard Mine in Quebec.

The history of the exploration and discovery of primary kimberlite-hosted diamond deposits throughout Canada (>750 kimberlites are currently reported; >95% of these have been discovered since 1990) will be examined in the context of old (and revised) surficial geology and geophysical exploration models and tactics. Emphasis is placed on the important diamond mines in Canada, or kimberlites at the advanced stages of evaluation or development (e.g. Fort à la Corne, Saskatchewan).  Some of the ‘unusual’ characteristics of Canadian kimberlites, such as the small size but exceptionally high diamond grades of the Lac de Gras, NT kimberlites, or the huge size of the Fort à la Corne kimberlites, are compared with those of producing kimberlites worldwide.

Genetic models for kimberlite volcanic emplacement and formation/destruction of diamonds have undergone radical revisions over the past two decades, due to the significant new knowledge derived from Canadian kimberlite and diamond deposits. In addition, access to mantle xenoliths and xenocrysts from these kimberlites has radically changed our understanding of the mantle lithosphere of the Canadian Shield.

Kjarsgaard has 30+ years experience that range from regional geological mapping to detailed mineral deposit scale studies. His forte is solving problems utilizing broad-based petrology methods (including mineralogy, major and trace element mineral chemistry, whole rock geochemistry, experimental petrology, volcanology) of mantle-derived volatile-rich ultramafic rocks (kimberlites, carbonatites), economic mineralization associated with these rocks, and exploration methods for these deposit types.

Kjarsgaard obtained his Honors B.Sc. (Specialized Honors Earth Science) at the University of Guelph, Canada, in 1986 and his Ph.D. from The University of Manchester, England, 1990.

Join us as we unearth the latest on Canadian kimberlite-hosted diamond fields on Friday, October 19, 2018 at 12:30 PM in Room 204, Natural Science Building on the East Lansing Campus.