The Martha 4 (Magnetite Hill zone) occurrence is located on the north side of Storey Creek, approximately 2.5 kilometres northeast of the creek mouth on Nimpkish Lake.

The area is underlain by north striking carbonates and calcareous sediments of the Quatsino and Parson Bay formations overlie Karmutsen Formation tholeiitic basalts, all of the Upper Triassic Vancouver Group. Lower Jurassic Bonanza Group andesitic to rhyodacitic lava, tuff, breccia and minor sediments are coeval with, or genetically related to, granodiorite of the Nimpkish batholith of the Jurassic Island Plutonic Suite. Strong regional north to northwest trending faults, often defining intrusive and lithological contacts, traverse the area.

Locally, a massive magnetite lens measuring 11 by 24 metres, strikes 080 degrees along the limestone-granodiorite contact. Small pods of magnetite also occur along 080-degree striking felsite dikes cutting the limestone. Chalcopyrite and sphalerite are associated with the magnetite.

In 1988, a sample assayed 0.49 per cent copper and 0.31 per cent zinc over 0.6 metres (Assessment Report 18704). In 1989, a sample (SZ-1) assayed 0.101 per cent cadmium, 0.259 per cent copper and 14.9 per cent zinc (Assessment Report 20092).

Small pods and veins of magnetite, to 0.45 metres wide and 3.0 metres long, are associated with felsite dikes in granodiorite on the Martha 5 claim (Assessment Report 417). Garnet, epidote and ferro-magnesian minerals are reported in small patches (Assessment Report 417, page 3).

Another zone of mineralization is located approximately 200 metres south of the Martha 4 occurrence and comprises a 20-metre-wide gossanous zone exposed along a roadcut at the contact between Quatsino Formation limestone and a volcanic unit interpreted to be Karmutsen Formation basalt. The gossanous zone contains two subvertical metasomatic (propylitic) alteration zones striking 204 to 232 degrees and dipping 15 to 20 degrees northwest. Proximal to the contact zone semi-massive to disseminated pyrite with minor chalcopyrite, sphalerite and magnetite, whereas 10 metres east of the contact a 0.5-metre band of magnetite is reported. In 2017, a rock chip sample (S-17-12) of the mineralized gossanous zone yielded up to 11.8 grams per tonne silver, 0.208 per cent copper and 0.502 per cent zinc (Assessment Report 36824).

A fourth area of mineralization, referred to as the Storey zone and comprising outcrops of magnetite, is located approximately 450 metres east-southeast of the Martha 4 occurrence. In 2017, five chip samples (S-17-24 through -28) yielded from 12.31 to 31.11 per cent iron, whereas a nearby float boulder sample (S-17-30) assayed 24.36 per cent iron, 4.24 per copper and 0.63 gram per tonne gold (Assessment Report 36824).

A fifth area of mineralization is reported approximately 550 metres south-southeast of the Martha 4 occurrence and comprises an 8- by 10-metre zone of altered volcanic rock containing semi-massive sulphides (chalcopyrite, bornite, pyrite, sphalerite, and magnetite) near a contact with granodiorite. In 2017, an outcrop sample assayed 0.222 per cent copper, 4.8 grams per tonne silver and 24.36 per cent iron, whereas a float boulder sample (S-17-1) from the occurrence area assayed 0.479 per cent copper and 10.6 grams per tonne silver (Assessment Report 36824).

Work History

In 1961, BHP-Utah Mines completed a program of geological mapping and a ground magnetometer survey on the area as the Martha and Storey claims. In 1965, Cominco completed a ground magnetometer survey on the area as the Zip claim. In 1969 and 1970, Archeron Mines, completed programs of geological mapping and silt and soil sampling. In 1979, Minas De Cerro Dorado Limited completed a program of geological mapping on the area as the Ricky claim. In 1982, Imperial Metals completed a program of geochemical sampling and geological mapping on the area. In 1988, Hercules Ventures completed a program of geological mapping, geochemical sampling and trenching. In 1998, Doublestar Resources completed a program of geochemical sampling, geological mapping, ground geophysical surveys and trenching on the area as the Storey 1-8 and Joe 1-4 claims. During 1989 through 2006, J.W. Laird completed programs of rock sampling and geological mapping on the area as the Nimpkish and CBL 1-10 claims. During 2010 through 2012, Selkirk Metals Corporation completed programs of prospecting and geochemical sampling on the area as the Storey Creek property. In 2017 and 2018, Selkirk Metals Corp. completed programs of geological mapping and geochemical (rock and soil) sampling on the Storey Creek property.