The region is underlain by a roof pendant, consisting of volcanic and sedimentary rocks, within the Eocene Coast Plutonic Complex. These pendant rocks have been correlated with Middle-Upper Jurassic Hazelton Group rocks and overlying upper Middle to Upper Jurassic Bowser Lake Group sedimentary rocks (Geological Survey of Canada Open File 3453). The Hazelton rocks consist of variably chloritized pillow and massive andesite and basalt with minor mafic tuffs. The overlying Bowser Lake sediments consist of argillite, siltstone and sandstone with minor chert and limestone. There are two observable phases of folding in the area, an initial north-northeast trending phase followed by a later east-northeast trending phase.

The Outsider-Star quartz vein system consists of two veins, both striking at about 010 degrees. The most significant of the two is the Outsider vein but the Star vein (103O 019)is generally considered to be its southern extension. The Outsider vein dips 45 degrees east, has been traced for about 900 metres and varies from 0.6 to 6.1 metres in width, averaging 3.0 metres. The Star vein has been traced along strike for 680 metres and varies from less than 0.5 metres to 1.8 metres in width. The Outsider vein lies along the contact between greenstone (hangingwall) and silicified argillite (footwall) and is conformable to the bedding of the hostrocks.

Mineralization in the Outsider vein consists of chalcopyrite and pyrrhotite with minor pyrite and traces of sphalerite in a gangue of fine grained, grey to white quartz. Higher grade ore lies near the wall of the vein. The Star vein consists of fine grained white quartz with pyrrhotite and lesser chalcopyrite. Locally, up to 50 per cent of the vein consists of sulphides.

Discovered in 1896 during the Gaillard Expedition, the Outsider vein was mined initially during 1906 and 1907 and shipped ore to the Brown-Alaska smelter in Alaska. Between 1924 and 1928, 112,966 tonnes of ore was produced for silica flux and copper smelting at Anyox. A total of 125,966 tonnes grading 1.9 per cent copper were produced from the Outsider vein between 1906 and 1928. In the last two years of production the ore averaged 0.139 gram per tonne gold and 10.29 grams per tonne silver. In 1917, the Star vein produced 4845 tonnes of quartz carrying minor copper, gold and silver values (Minister of Mines Annual Report 1917).

There are adits on the Star and Outsider veins at the following elevations (in metres): 91, 183, 274, 326, 350, 380, and 395. The Outsider vein system has been traced for about 914 metres on surface and was mined over a vertical depth of 152 metres. Production from the vein was limited to one main oreshoot. The oreshoot, which averaged 4.3 metres in width, was mined from 274 metres elevation to the surface.

Unclassified reserves for the Outsider property are 181,440 tonnes grading 1.5 per cent copper (CIM Special Volume 37, page 183).

In 2006, TA Minerals completed an airborne geophysical survey over the Maple Bay area. In 2010, a program of MMI soil sampling was completed on the area.

In 2014, a program of geological mapping, geochemical (rock and soil) sampling and a 4.3 line-kilometre ground magnetometer survey were completed on the Coastal Copper claim. Rock samples from the area are reported to have yielded up to 4.20 per cent copper and 36.7 grams per tonne silver (Wasteneys, H. (2018-09-28): NI 43-101 Technical Report - Maple Bay Property).

In 2018, Golden Opportunity Resources Corp. examined the area as the Maple Bay property. A sample of float from the area assayed 5 per cent copper, 26 grams per tonne silver and 0.105 gram per tonne gold (Wasteneys, H. (2018-09-28): NI 43-101 Technical Report - Maple Bay Property).