The Mascot showing occurs near the northwest corner of Porcher Island about 1.5 kilometres east of the Surf Point Mine (103J 017).

A quartz vein, striking 050 degrees and dipping 80 degrees north, occurs in Cretaceous to Tertiary quartz diorite of the Coast Plutonic Complex near its contact with Paleozoic to Mesozoic mixed volcanic and plutonic rock. The vein is sheared and is up to 1 metre wide and 20 metres long. Mineralization consists of stringers of pyrite. A selected sample assayed 27 grams per tonne gold and 41 grams per tonne silver (Minister of Mines Annual Report 1933, page 42).