The HPH 1 occurrence is located south of the Nahwitti River, approximately 1.85 kilometres east- southeast of its mouth on Nahwitti Lake.

Regionally, the area is underlain by northwest-trending belts of basaltic volcanics and carbonate sedimentary rocks of the Upper Triassic Karmutsen and Quatsino formations (Vancouver Group) and mafic volcanics and sediments of the Upper Triassic to Lower Jurassic Bonanza Group (Holberg volcanic unit, Nahwitti River wacke and Parson Bay Formation). These volcanic and sedimentary rocks have been intruded by granodioritic rocks of the Early to Middle Jurassic Island Plutonic Suite.

Locally, Quatsino limestone, estimated to be 150 metres thick (Geological Survey of Canada Summary Report 1931A), is silicified and altered to skarn in the vicinity of a felsite dike. Skarn minerals consist of epidote, garnet, diopside and actinolite. Magnetite, pyrite and pyrrhotite with minor chalcopyrite and sphalerite are exposed in the portal of the adit. The mineralization is irregular in outline and is exposed by pits and opencuts over an area of 80 by 3 metres.

In 1936, samples from the shaft area assayed 0.69 gram per tonne gold, 1206.7 grams per tonne silver, 41.0 per cent lead and 25.7 per cent zinc across 1.8 metres (Minister of Mines Annual Report 1936).

In 1981, a chip sample (HPH-18) across 1.8 metres of solid galena, located east of the shaft, assayed 10.50 per cent zinc, 38.10 per cent lead and 3735 grams per tonne silver (Assessment Report 9507).

In 1987, a 2-metre chip sample of mainly galena mineralization from the east wall of the east shaft assayed 3743.4 grams per tonne silver, 38.1 per cent lead and 10.6 per cent zinc (Assessment Report 16347).

In 1988, a chip sample (153) from the east shaft collar assayed 0.07 gram per tonne gold, 1065.4 grams per tonne silver, 39.4 per cent lead, 12.12 per cent zinc and 0.01 per cent copper across 1.0 metre (Assessment Report 17393).

In 2006, a sample from the west shaft area assayed 22.80 per cent zinc, 12.80 per cent lead and 713 grams per tonne silver (Assessment Report 28656).

Another zone of mineralization is located near the top of a small ridge to the southwest of the shafts and comprises honey-coloured sphalerite, hydrozincite and galena hosted within a limestone. In 1992, two samples (76208 and 76209) assayed up to 4.66 per cent zinc, 3.07 per cent lead and 315.3 grams per tonne silver (Assessment Report 22283).

In 1930, American Smelting and Refining drove a 33-metre adit south to intersect an east-trending zone of galena-sphalerite mineralization in silicified limestone. Two shafts on either side of the zone have also been excavated. The east shaft is reported to be 10 metres deep. The west shaft is reported to be 12 metres deep, encountering a 9-metre long cave-in at the bottom (Minister of Mines Annual Report 1931; Geological Survey of Canada Summary Report 1931A). In 1945, Sheep Creek Mines Ltd. completed a dozen short drillholes. In 1948, Western Mines completed an induced polarization and magnetic survey on the area. In 1952, American Smelting and Refining completed a program of geological mapping on the area.

In 1966, Giant Explorations Ltd. completed a program of geological mapping and geochemical sampling on the area as the HPH claims. During 1969 through 1972, Giant Explorations Ltd. completed programs of soil sampling and ground and airborne geophysical surveys on the area. In 1979, Loredi Resources prospected and mapped the area as the Gold and Dust claims.

In 1980, Tally Resources Ltd. prospected and mapped the area as the Pato claim. In 1981, Silver Bar Resources prospected the area. In 1984, the area was prospected and sampled by Daiwan Engineering as the Mead claims. During 1987 through 1991, Hisway Resources Corp., completed programs of geological mapping, ground geophysical surveys, geochemical sampling and six drillholes, totalling 381.5 metres, on the area. In 1992, Cameco Corporation completed a program of rock and soil sampling, geological mapping and ground geophysical surveys on the area.

In 2006, New Livingstone Minerals prospected and sampled the area. In 2017 and 2018, Precipitate Gold Ltd. completed programs of rock and soil sampling, gravity surveys and prospecting on the area as the Island Zinc property.