In Brief:
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- Large land position covering multiple discoveries in Finlayson Lake VMS camp
- Extensive database including geology, geochemistry and property-wide geophysics (aerial magnetics and VTEM) available
- Untested 800 m soil anomaly up to 576 ppb Au and 0.55% Zn
- Similar geological setting to surrounding VMS deposits
- Pronounced regional geochemical highlight of Finlayson district
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Expo covers a prominent series of VMS targets in the heart of the Finlayson Lake VMS district. Recent soil geochemistry work and aerial geophysics complement past prospecting finds and highlight the potential for discovery near the existing infrastructure of the Wolverine Mine.
Project History
Regional stream sampling conducted by the Geological Survey of Canada in the 1980s revealed a large area of strongly anomalous Zn, Ag, Cu, Ba, & Pb in silts some 25 km south of Wolverine Lake in the Finlayson VMS district. Follow-up prospecting by Ron Berdahl led to discovery of bedded sulphides grading to 13.53 % Zn, with skarn outcrops grading to 17% combined Pb-Zn. Samples from an exposure of bedded sulphides returned 10.8% Zn, 0.3% Cu and 325 g/t Ag.
Cominco Ltd. optioned the Expo property from Berdahl in the mid-1990s. Limited drilling intersected bedded Zn-Cu-Ag-Ba mineralization and favorable stratigraphy to host VMS-style deposits. Cominco’s final word before dropping the option was that Expo remained a significant VMS target, recommending further drilling and additional exploration on the property (Bannister, 1997). The project has not been optioned since. 18526 Yukon Inc. recently completed a property-wide aerial magnetic and VTEM survey, and discovered a strong multi-element anomaly in soils, with anomalous Zn values up to 5497 ppm (0.55%) and Au values to 576 ppb (0.576 g/t) over an ~800 x 300m area. This work has yet to see follow-up.
Geology & Mineralization
Expo is underlain by the “middle unit” of the Yukon Tanana Terrane, a sequence of Late Proterozoic to Paleozoic felsic metavolcanics, carbonaceous phyllites and schists with interbanded mafic metavolcanics that is also host to the Wolverine (3.75 Mt @ 12.5% Zn, 1.4% Pb, 1.4% Cu, 336.6 g/t Ag, 1.6 g/t Au – recently in production with Yukon Zinc Corp.), Kudz Ze Kayah (18.3 Mt @ 6.3% Zn, 1.9% Pb, 0.9% Cu, 1.4 g/t Au, 148 g/t Ag – in feasibility stages with BMC Minerals) and Fyre Lake (3.6 Mt @ 1.57% Cu, 0.10% Co and 0.61 g/t Au) deposits in the surrounding Finlayson Lake District. Showings on the Expo property bear mineralogical similarities both to Wolverine and to KZK, though the pronounced geochemical signature at Expo suggests a larger or stronger system could be at play.
Infrastructure
The Expo claim block lies within 20 km of the Wolverine Mine access route, within 25 km of Yukon Zinc’s mill, and within 30 km of the Robert Campbell Highway. The proximity of other significant VMS deposits in the district has obvious benefits for the Expo property, both in terms of illustrating its potential to host similar mineralization, and by reducing development costs should another nearby deposit go into production.
For more information on the Expo project please contact us.