Coppercorp / Glenrock Gold
Results of Stone Gold’s exploration program in 2018 was the rediscovery and identification of new gold occurrences west and north of the Glenrock main grid in grab samples reporting values of up to 13.4 g/t Au.
This discovery was made in an area that largely remains untested in terms of drilling, with the results confirming that the main grid of the Glenrock showing is open along strike to the west based upon a grab sample reporting 10.6 g/t Au.
During 2019, follow-up prospecting in the vicinity of the 10.6 g/t Au sample uncovered multiple additional outcrops within the heavily vegetated area. These outcrops consisted of highly silicified, finely pyritized, Archean mafic volcanic rocks spread over two hundred square metres.
Twelve grab or one square metre composite were collected which reported an average of 1.37 g/t Au with values of up to 4.9 g/t Au.
The mineralized surface area appears to be open for expansion to the east, west and north of the occurrence.
Thirteen core samples obtained over 14 sequential metres of 95% unsplit core returned values averaging 0.51 g/t Au and up to 1.73 g/t Au. The samples were collected from a historic drill hole west of the same area. The mineralized section is open at both ends.
Nearly every core and surface outcrop sample collected in 2019 from the Glenrock Gold West area reported anomalous to ore grade value.
The Land Package
The Mamainse Point area in Ontario, Canada has a long history of copper exploration and mining including two past producing deposits: the Coppercorp Mine (1965-1972) and the Tribag Mine (1965-1973), the former within the present Coppercorp Property (“Property”) holdings while latter to the east on adjacent claims held by a third party. Following closure of the mines, the area of the Coppercorp Mine was closed to staking and exploration for 30 years by the Ontario Government becoming available to the public again in 2002.
The Coppercorp Property is located in Ryan, Palmer, Kincaid and Nicolet townships in the area of Mamainse Point on the southeastern shore of Lake Superior 85 kilometres north of the town of Sault Ste. Marie in north central Ontario, Canada. The Trans-Canada Highway crosses the westernmost portion of the property and provides a major all weather road connection to Sault Ste. Marie to the south.
The claims cover an area of approximately 17,856 ha (178.56 km2) and are in good standing until at least January 5, 2018. The total value of work required to keep the claims in good standing is $446,400 per annum and the total value of available reserve credit is $1,537,378 that can be applied to extend the claims until at least 2021.
The project is situated on the eastern edge of the Late Proterozoic (1050-1115 Ma) Midcontinent Rift, most of which now lies beneath Lake Superior. Numerous past-producing and present deposits have been discovered and mined around Lake Superior associated with the rift, including the prolific native copper deposits of the Keweenawan Peninsula, Michigan. The Coppercorp Property is situated within the
Mamainse Point Formation of the Keweenawan Group in the Proterozoic Southern Province, on the eastern edge of the Mid Continental Rift.
The Coppercorp Property represents an aggregate of the majority of those prospects including the Former Montreal Mining Sand Bay mining leases encompassing the Coppercorp Mine area, Baseline and Kincaid Breccia prospects, Jogran Porphyry and Richards Breccia prospects, and Glenrock gold prospects. The Property was considerably enlarged by the immediate previous holder Superior Copper Corporation in 2011 to 2013 adding the Baseline Prospect claims to the north and the Jogran / Richards and Glenrock claims to the east to the core Coppercorp Mine area holdings.
Glenrock Historical Drilling and Sampling
Archean Lode Gold Mineralization
Vein and shear hosted Archean lode gold showings and occurrences as exemplified by the Glenrock Au-Ag-Co prospects are found in the southeast part of the property. The Glenrock Prospect area is broken down into the Glenrock Main, Glenrock North, and Bjornaa Vein Au-Ag (+-Co-Cu) showings. The showings are hosted in sheared, east-west striking, mafic metavolcanic carbonated rocks interspersed with series of ribbon-like cherty seams plus thin quartz veins and patchy pyritization. The dimensions and continuity of these showings remain undetermined.
Historic trenching results include 6.33g/t Au over 4m and 3.96g/t Au over 8m plus diamond drilling results from Aurogin holes AR97-04 and AR97-08 report intersections of 4.2m at 3.4g/t Au and 13m at 1.27g/t Au at the Glenrock North showing. At the Glenrock Main showing a historic trench reports 0.44 oz/ton Au, 0.4% Co, 0.9% Cu over 3.5 ft and drilling intersected up to 5.6g/t Au and 0.07% Cu over 1.5m in hole AR97-01.
After acquiring the claims covering the Glenrock area in 2012, the historic work that has been conducted on the multiple mostly gold showings of the prospects was reviewed by Superior Copper with a focus on the Aurogin 1997-1998 exploration program which consisted of surface stripping and sampling followed by IP surveying and diamond drilling (Table 6-1). The IP surveys were re-interpreted to determine the correlation among chargeability, sulphide and gold content, finding that most significant Au values in drill core are associated with pyrite and chalcopyrite mineralization in areas of moderate-strong IP chargeability anomalies. Drill core from three Aurogin holes were quartered, re-sampled and re-analyzed by Superior Copper with results shown in Table 6-8.