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Location: 3 km SW from Tyndrum, United Kingdom
57 Sloane Street, 1st Floor, Gabba Buidling, The Campus Office Park,JohannesburgSouth Africa
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In March 2025, Acrux acquired its majority stake as part of a long-term investment to recapitalise and restart the mine.
The Cononish deposit is hosted in a meta-sedimentary sequence of schists, pelites, quartzites, psammites and calcareous rocks of the Appin and Argyll Groups belonging to the Dalradian Supergroup.The gold and silver mineralisation occurs within a steeply-dipping quartz vein which is up to 8.3m wide and has an average width of about 1.8m. The vein system was emplaced during the late to post-tectonic late Silurian to early Devonian episode of granitoid intrusion in the Grampian Highlands. It shows both brittle and ductile style deformation and completely postdates metamorphism and associated Caledonian foliations. Quartz veining is associated with the Tyndrum Fault, one of a set of northeast southwest trending, left lateral, faults characterizing the Scottish Highlands.Gold occurs as electrum (a natural gold / silver alloy) and some minor amounts of native (pure) gold; silver occurs additionally as minor tellurides. The gold/electrum is fine-grained, generally <100 µm in size. Visible gold up to 1,000 µm to 2,000 µm in size is rare. Assay data suggests that gold and silver is spatially associated with sulphides in the quartz vein. The main sulphide is pyrite, but galena, chalcopyrite and sphalerite occur in small amounts.Although the vein outcrops on surface in limited areas, this will not be exposed by mining and little weathering and no supergene alteration has been encountered to date.
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