The centre of the Alder Zone is located about 350 metres west of the Edye Pass Mine (103J 015) in the Refuge Bay area on North Porcher Island, 36.7 km south-southwest (209°) of Prince Rupert, B.C. The area is underlain by a Creta- ceous to Tertiary quartz diorite stock of the Coast Plutonic Complex that has intruded Paleozoic to Mesozoic metasediments and meta- volcanics. The zone trends for about 300 metres in a northeast direction.

Few details of the zone are reported except that mineralization is similar to that of the AT Zone (Surf Point Mine, 103J 017). At least 3 holes have been drilled on the Alder Zone with the best intersection grading 19.06 grams per tonne gold over 1.2 metres (George Cross Newsletter #92, May 12, 1988).

AT Zone mineralization is presumed to be the same as the general description for the Surf Point Mine: ie. the deposit consists of short and irregularly distributed lenses of auriferous pyrite and chalco- pyrite in quartz veins, largely within quartz diorite.

In 2015, Imperial Metals Corp. conducted an exploration program to locate old showings on their Porcher Island property. The program included 9 rock samples from showings, 32 soil samples and 12 stream sediment samples. The stream sediment sampling proved successful in delineating the Edye Shear, a known gold bearing area, as a gold target, with the highest gold stream sediment sample, 128.8 ppb at site PIG-15-05, less than 100 m northeast of the Alder showing. This location is on the drainage of the regional depression of the Edye Structural corridor which contains gold bearing veins and structures (Assessment Report 35801).