Chapter 7: The LaRonde Penna Au-Rich Volcanogenic Massive Sulfide Deposit
Published:January 01, 2017
Patrick Mercier-Langevin, Benoît Dubé, François Blanchet, David Pitre, Annie Laberge, 2017. "The LaRonde Penna Au-Rich Volcanogenic Massive Sulfide Deposit", Archean Base and Precious Metal Deposits, Southern Abitibi Greenstone Belt, Canada, Thomas Monecke, Patrick Mercier-Langevin, Benoît Dubé
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The 2698 Ma LaRonde Penna deposit, with over 71 Mt of ore at 3.9 g/t Au (280 t Au or ~9 Moz Au), is the second largest Au-rich volcanogenic massive sulfide (VMS) deposit in the world. It is part of the Doyon-Bousquet-LaRonde mining camp in the eastern part of the Blake River Group.
The deposits of the Doyon-Bousquet-LaRonde mining camp are hosted by the volcanic rocks of the Hébé-court (base) and Bousquet (top) formations that form a southward-younging homoclinal sequence, with nearly vertical dips due to a north-south compressional event responsible for the development of an E-W–trending, steeply S-dipping,...