The Foghorn prospect is located approximately 4 kilometres northwest of Drybrough Peak, some 280 kilometres north of Smithers. The occurrence lies within the Omineca-Cassiar mountains at the southern end of the Toodoggone gold camp. The prospect is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins.

Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks. These Takla rocks have been intruded by plutons and other bodies of the mainly granodiorite to quartz monzonite Early Jurassic Black Lake Suite and are in turn unconformably overlain by or faulted against Lower Jurassic calcalkaline volcanics of the Toodoggone Formation, Hazelton Group.

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

The Foghorn prospect is underlain by porphyritic augite plagioclase andesites and related lahars of the Takla Group. These Takla Group volcanics are bounded on the west by quartz diorite to diorite of the Black Lake stock. Propylitic alteration is commonly well developed in the Takla Group volcanics, particularly around porphyritic diorite dikes. Quartz and/or carbonate veining is moderately common as individual veins and as vuggy stockworks. Hematitic and limonitic alteration is common around these vein stockworks.

The Foghorn prospect consists of a major quartz-carbonate vein stockwork zone averaging about 500 metres long by 1.5 metres wide and trending 305 degrees. Veins are vuggy with drusy quartz linings and have pervasive silicification associated with them. Carbonate is commonly associated with these veins. Disseminated pyrite is abundant in both veins and surrounding country rocks.

A total of eight rock chip samples were taken from this quartz vein stockwork during property exploration in 1983. Several of these samples yielded significant assay results. Sample AA-27107 analyzed 45.5 grams per tonne silver and 2.60 grams per tonne gold (Assessment Report 11525). A second sample from the same location, sample AA-27018, assayed 54.5 grams per tonne silver and 2.05 grams per tonne gold (Assessment Report 11525). Also at this time, two samples (AA-26868 and AA-26869), taken approximately 700 metres to the north, yielded values of up to 0.16 gram per tonne gold, 6.7 grams per tonne silver, 0.460 per cent lead and 0.365 per cent zinc (Assessment Report 11525).

In 1988, a rock sample (32658) of rusty, silicified andesite, located approximately 700 metres to the west on the Jerry claim, assayed 0.625 gram per tonne gold and 3.1 grams per tonne silver over 0.15 metre (Assessment Report 18026).

In 2003, samples from the Foghorn occurrence area yielded up to 1.48 grams per tonne gold (Assessment Report 27429).

Work History

In 1983, Kidd Creek Mines Ltd. completed a program of prospecting, geological mapping and rock sampling on the area as the Foghorn and Leghorn claims.

In 1985 and 1988, Energex Minerals Ltd. completed programs of rock, silt and soil sampling on the area as the Leghorn claim. Also in 1988, Beachview Resources completed a program of geological mapping and geochemical (rock and soil) sampling on the area immediately west as the Jerry claim.

Refer to the Pine (MINFILE 094E 016) for details of the Pine property which contained the occurrence from the late 1990s to 2014. Exploration work included programs of rock and soil sampling, geological mapping and airborne geophysical surveys.

In 2003, prospecting in the Dawn-Shastex occurrence area by Stealth Minerals Ltd., as part of their larger Pine property exploration, yielded approximately 130 rock samples.

During 2016 through 2018, Amarc Resources Ltd. completed programs of soil and rock sampling, geological mapping, 115.0 line-kilometres of ground induced polarization surveys and 1940.0 line-kilometres of airborne magnetic surveys on the area as the Joy property.