Scadding Township, East Wahnapitae, Ontario
The Alwyn-Porcupine was mined in 1901, having reported past production of 6,363 tonnes at 6.857 g/t Au and 3% Cu from a shaft with lateral workings. In 1983 the Alwyn Porcupine Mine was dewatered, with mapping and sampling done on the east face of the first level 30 feet below surface. Assays from this program returned 15.086 g/t Au and 5.97% Cu over 6 feet (MNDM Assessment file report AFRI #41I10NE0154).
Mineralization at this site occurs within crack-seal quartz veins containing chalcopyrite with associated malachite staining. (Photo below)
Crack-Seal Texture on the Alwyn-Porcupine Mine Site
Newly exposed quartz veins vary in width between 1cm and 30cm, some are altered moderately by carbonate. Numerous E-W trending veins contain between 1-15% chalcopyrite. Another vein set trending between 300-330 degrees commonly lacks sulphide mineralization or contains sulphides where contact with an E-W trending vein occurs. The exposed stripped areas containing quartz veins and stringers define a width of about 22m from shear to olivine diabase dyke. The map below shows mapping and sampling done in a trench 10m north of the historical shaft.
Anomalous samples from the stripping program are listed below:
Future work will involve cutting a localized grid and undertaking a magnetometer and electromagnetic (possibly an IP) survey. Existing historical boreholes may allow for borehole surveying of adjacent conductors.