The region has a long mining history and has produced 4.1M ounces of gold production over the past 100 years. One of the larger past-producers was the combined MacLeod-Cockshutt Mine which produced 1.5M ounces of gold. More recently the Hardrock Project held by Greenstone Gold Mines (jointly owned by Centerra and Premier) has elevated attention to the area by announcing their intentions to mine their project near Geraldton, Ontario (east of Longrose on Highway 11). The Hardrock project mineral resources include: 1.4M ounces gold in measured and indicated; and 1.36M ounces gold in the inferred categories.
In 1947 Longrose Gold Mines drilled 18 short, AQ-sized diamond drill holes totally about 2000m. These short holes appear to have been testing structures associated with the nose of folds along the margins of banded iron formation (BIF). Mineralization within the historical holes indicates narrow, high-grade intercepts at BIF contacts. Diamond drill hole 47-17 was drilled to a depth of 157 ft (48m) and was collared on BIF. Logs record sedimentary bedrock showing alteration and silicification for about 27m down hole. Only the quartz veins were sampled returning assays of 1.1 to 1.7 grams per ton, outlining a significant interval of mineralized rock. Diamond drill hole 47-12 along strike, west of DDH47-17 drilled the same BIF unit and also retuned narrow, high-grade gold intercepts. From near the top of the hole, at 36 feet (11m), to the bottom of the hole at 711 feet (216.7m) drill logs record altered greywacke and quartz veining with lean banded iron formation again only the quartz veins were sampled. One 0.5-foot vein returned 0.9 ounces per ton (~25.5 g/t). The interval from 34.5 m to 54.6 m records 4 veins within greywacke and banded iron formation and having significant pyrite and pyrrhotite. The veins sampled in this interval returned values between 0.6 and 1.7 g/t outlining a 20m wide target at/or near surface. Similarly, another east-west trending structure extends westward from the Lake Nipigon South showing (east of the claims) toward DDH47-01 and may extend still further westward drill holes UND-01 and UND-03 (1998). While there is not enough data to know if the mineralized intercepts in these holes are the same structure are they are on the same trend and form a exploration target. (Figures 5 & 6).