John McBride, M.Sc., P.Geo, Senior Exploration Geologist, Generation Mining
Generation Mining’s Marathon palladium-copper deposit, situated near the town of Marathon Ontario, is located within the Mesoproterozoic Coldwell Alkaline Complex (Coldwell Complex) in the Midcontinent rift of North America.
The conduit style Marathon palladium-copper deposit exhibits exceptional grades and is an example of extreme PGE enrichment ranking it among the world’s highest-grade localities of PGE in disseminated sulfides.
PGE mineralization occurs within the oldest part of the complex within the mafic to ultramafic rocks of the Marathon Series which host the deposit.
In general mineralization consists of varying proportions of chalcopyrite, pyrrhotite, bornite and pentlandite and associated PGE with pyrrhotite being dominant near the footwall and chalcopyrite being more abundant in the upper part of the deposit. Sulfide abundance in mineralized zones is controlled by topographic relief with three dimensional trends of higher Cu and Pd concentrations following ridges and troughs in the footwall.
The Marathon Deposit consists of several large, thick and continuous zones of disseminated sulfide mineralization hosted within the Two Duck Lake Gabbro. The mineralized zones occur as shallow dipping sub parallel lenses that follow the basal gabbro contact and are labeled as footwall, main, hanging wall zones and the W Horizon. The Main Zone is the thickest and most continuous zone. For 516 drill hole intersections with intervals greater than 4 m thick, the average thickness is 35 m and the maximum thickness is 183 m.
The Marathon deposit contains a Measured and Indicated Mineral Resource of 7.13 million oz palladium equivalent (PdEq) within a 179 million tonne pit constrained deposit grading 1.24 grams per tonne PdEq calculated at a CAD $13.00 NSR cut-off (includes an estimated 3.24 million oz Pd, 1.06 million oz Pt and 796 million lbs Cu).
The project has an established resource with the potential to incrementally expand resources at the Marathon deposit, to verify and incrementally expand resources on the nearby Geordie and Sally satellite deposits as well as to outline new resources through exploration.
Generation Mining recently announced that it is in the process of undertaking several short-term trade-off studies prior to commencement of a definitive feasibility study (DFS) later this quarter (Q2-2020).
Generation Mining has opted to undertake a DFS rather than preliminary feasibility study as there have been two previous feasibility studies completed on the project in 2010 and 2014 at significantly lower palladium prices.
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