Adeline Project Information
Stratiform sediment-hosted copper (SSC) deposits
Grey Bed Hosted Mineralization
- Strongly foliated grey shales/slates with mineralization either transposed into fabric or emplaced parallel to fabric and then modified. The mineralization consists predominantly of malachite ± azurite after disseminated bornite ± disseminated chalcocite and minor chalcopyrite [e.g. S. Adeline Mountain –South (left photo) Whiskey Lake 64 (right photo)].
- Strongly foliated grey shales/slates with mineralization hosted within or along boundaries of quartz veins that can be boudinaged within regional foliation. The mineralization consists predominantly of malachite ± azurite after being disseminated to locally massive bornite ± disseminated chalcocite (e.g. Adeline Island and South Adeline Mountain).
Mafic Volcanic Hosted Mineralization
Mineralization is predominantly in quartz-carbonate veins in foliated basalts and along structurally controlled sites such as joints and/or foliation. Copper is present as native copper and locally in malachite and bornite minerals (e.g. Whisky Lake 150 and Salmon Lake Main).
Grey Quartzite Hosted
Host rocks are weakly foliated grey quartzites in close proximity to contact with grey shales/slates. Mineralization is associated with foliated zones near contacts with quartzite or disseminated within the host quartzite matrix with no direct foliation control (e.g. Ellis Main and Adeline Island)
The Ellis Main prospect is exposed in a series of 11 trenches along a steep cliff face south of the western end of Seal Lake. Chalcocite-bornite occurs in association with quartz-carbonate veining within grey phyllite-slate of the Adeline Island Formation. The strongest mineralization occurs across a width of approximately 3-4 m (Altius, Seal Lake Copper Project Technical Report, 2015).
Individual historic grab samples:
4.88% Cu and 192 g/t Ag (Altius 2015)
4.02% Cu and 90.7 g/t Ag (Altius 2015)
3.92% Cu and 166 g/t Ag (Altius 2015)
3.54% Cu and 87.1 g/t Ag
Historic Drill intersections:
From 90.6m intercept: 7.9m @ 1.76% Cu and 56.2 g/t Ag (Playfair hole SL-11-10)
From 57.6m intercept: 4.3m @ 1.69% Cu & 51.8 g/t Ag and from 66.5m intercept 2.1m @ 1.66% Cu & 45.6 g/t Ag (Kennco hole K-10)
From 92.4m intercept: 0.9m @ 1.08% Cu & 19.2 g/t Ag (Kennco hole K-12)
Jeremy Niemi, P.Geo., Director of Exploration for Sterling Metals has reviewed and approved the technical information presented herein.