The 100% owned Round Pond zinc project is located west of Hare Bay, on the Great Northern Peninsula of northwest Newfoundland. This region has seen extensive, episodic programs of exploration for zinc since the 1960s.
The principal target is Mississippi Valley-type (MVT) Zn-(Pb-Ag) mineralization, as found at the former Newfoundland Zinc Mine (historic production from 1975-1990 of 7M tonnes @ 7.5% zinc) at Daniel’s Harbour, circa 140 km to the south. This style of mineralization may be transgressive, and thus be found at different horizons within the host sequence, the Ordovician-age St. George Group.
In 2018 Minfocus expanded the boundary of the original Round Pond project to 63 claims covering 1,500 ha by extending the original property border for roughly 2 km in a northeasterly direction to follow the key limestone-dolostone contact which dips very gently northeast. In August 2020, Minfocus staked 6 additional claims to the north of the expanded claims to cover a linear trend of small ponds which aligns with known regional trends of mineralization at Newfoundland Zinc.
A LiDAR survey was flown in September 2020 which will allow Minfocus to maintain all the Round Pond claims in good standing into 2021. The LiDAR results coupled with historical data from exploration by others will be used to define follow up geophysics and geochemical programs to support drill targeting tailored to the known geometries of MVT orebodies.
Diamond drilling in the 1970’s returned grades up to 6.4% Zn over 3m and outlined a potential Zn deposit, 600 m north of Round Pond. Further exploration in the 1980s indicated that the Main Zone of the Round Pond Deposit contained a non NI-43-101 adherent resource of 400 000 tons of ore grading 2% Zn (Born, 1983). A second zone, referred to as the Phillip’s Zone, was defined by drilling to the southeast of the Main Zone. The historic drill programs were all very shallow and mostly close to the main Round Pond showing, leaving significant exploration potential to be tested.
Previous workers have had varying opinions as to the genesis of the mineralization, which occurs as open-space fillings in dolostone host rocks, notably as the cement to two styles of breccia. Sulphide mineralization is predominantly early, coarse-grained sphalerite around dolostone clast margins. Galena occurs either as grains within sphalerite crystals, or in pore spaces between sphalerite crystals. Pyrite is also present and occurs as either disseminated grains in saddle dolomite cement, or as grains within the dolostone clasts.
Aerial view to SSW, with the main T-shaped Round Pond showing at centre, and its immediate surroundings:
The main showing at Round Pond, looking south along the length of the stripped zone: