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A Detailed Metallogenic Study Of The Mcfaulds Lake Chromite Deposits, Northern Ontario, Jordan E. Laarman

Electronic Thesis and Dissertation Repository

The Black Label, Black Thor and Big Daddy chromite deposits are a series of chromitite layers that are hosted by the 2734.5 +/-1.0 Ma ‘Ring of Fire’ Intrusion in the McFaulds Lake greenstone belt of Northern Ontario. Over 4200 electron microprobe analyses and 142 laser ablation ICP-MS analyses were performed on chromite and record individual fractionation sequences of chromitite below the metre scale. In comparing results, the dunite-hosted Black Thor chromites are higher grade with 53 to 49 wt. % Cr₂O₃, more primitive than Black Label chromites at 50 to 46 wt. % Cr₂O …