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Location: 7,7 km NE from Lynn Lake, Manitoba, Canada
181 Bay street, Suite 3910TorontoOntario, CanadaM5J 2T3
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Both MacLellan and Gordon deposits can be considered as belonging to the class of gold deposits referred to as orogenic.Gold and silver mineralization can be geochemically anomalous to economic at the MacLellan site, Gordon area as well as the Burnt Timber – Linkwood areas of the southern belt. Gold is usually associated with pyrrhotite-pyrite mineralization and often with minor chalcopyrite, sphalerite, galena and arsenopyrite. Gold mineralization is often associated with narrow quartz and quartz carbonate veins and within semi-massive sulphide lenses 1 to 20 cm thick. Gold is usually very fine grained and is rarely visible and appears to be structurally controlled. The structures, usually quartz veins, are eastwest trending. At MacLellan and Burnt Timber gold-bearing structures dip steeply to the north and are hosted in mafic flows and sediments. Gold seems to be associated with carbonate and silica alteration.With respect to MacLellan, the high-strain-zone and accompanying hydrothermal alteration localized to the picrite flows and minor intercalated sediments, coupled with its chemical trapping characteristics created favourable conditions for gold mineralization. Hastie (2014) emphasizes the importance of brittle D4 structures, with supporting evidence for a second hydrothermal fluid event. The first gold-silver mineralizing episode, during ductile D2 shearing and alteration, is characterized by biotite ± quartz ± sulphide alteration and shows goldpyrrhotite-pyrite mineralization. The second episode of gold- silver mineralization exhibits fracture-fill Au, arsenopyrite, galena, and sphalerite, associated with D4 faulting and hydrothermal fluids with Cr- clinochlore + carbonate ± hornblende + quartz alteration. A significant increase in gold-silver mineralization near the intersections of D2 shear zones and D4 faults is noted throughout the MacLellan deposit. At Gordon, gold is often associated with quartz veins cutting folded and contorted Iron Formation, trending east-west and dipping shallowly to the south. Au mineralization is normally trapped in sulfide replacement zones averaging 2.4 m wide, associated with thin, centimetrescale quartz- sulfide veins and breccia veins. In places, coarse gold flecks are observed within these quartz veins and in iron-carbonate altered fragments within breccia veins. Strong ironcarbonate – chlorite – amphibole alteration is related to some high grade veins.
