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The Renard 2 kimberlite pipe is the largest body within a cluster of nine diamondiferous pipes emplaced approximately 640 Ma into Archean granitoid and gneissic rocks of the eastern portion of the Superior Craton, Canada (Fitzgerald et al, 2009). Located in the Otish Region of northern Québec, Renard 2, a mid-sized pipe with a surface expression of approximately 2.3 hectares, currently forms the bulk of feed to Stornoway Diamond Corporation’s newly commissioned Renard Mine. Kimberlite pipes within the Renard cluster are all characterized by similar Kimberley-type pyroclastic kimberlite (KPK; formerly termed TK or tuffisitic kimberlites). Renard 2 is a diatremeto root-zone kimberlite consisting of two main KPK pipe-infills (Kimb2a and Kimb2b) characterised by distinct diamond grades and determined as emplacement products from distinct and separate batches of magma. In addition, a third phase, Kimb2c, classified as hypabyssal kimberlite, occurs in the form of irregular intrusions and late stage cross cutting dykes. This phase is found within and along contacts of Kimb2a and Kimb2b, as well as along wall rock contacts, and contributes an average of 17% by volume to the modelled kimberlite pipe. A marginal country rock breccia, CRB, envelopes the KPK units, and smooths the external pipe shape.

Continuity of kimberley-type pyroclastic kimberlite phases within Renard 2 over 1,000 m depth – insights to the geological and emplacement model, Superior Craton, Canada