The JOK prospect is located west of Finlay River and 6 kilometres east-northeast of Drybrough Peak in the Omineca-Cassiar mountains some 275 kilometres north of Smithers. The prospect is at the southern end of the Toodoggone gold camp which lies within the eastern margin of the Intermontane Belt and is underlain by a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions. The JOK prospect is situated within a Mesozoic volcanic arc assemblage 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. Takla volcanics have been intruded by the granodiorite to quartz monzonite Black Lake Suite of Early Jurassic age 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.

A weakly developed quartz vein stockwork zone and localized minor brecciation is associated with a strong 3 to 5-metre wide north-northeast striking near-vertical fault. At least 6 narrow (a few centimetres wide) quartz-carbonate veins with vugs, occur over a 3 to 4 metre width in grey porphyritic, andesitic to dacitic flows of the Toodoggone Formation. The north-northeast striking fault separates crystal ash tuffs and flows (west side) from quartzose andesite of the Metsantan Member (east side) of the Toodoggone Formation. Bedding attitudes strike 160 degrees and dip 30 degrees east on the southeast side of the fault.

Multibanded quartz-chalcedony and purple amethystine quartz- bearing veins and breccias contain malachite, chalcopyrite, and dark coloured sulphides (tetrahedrite?). Silicification locally affects the andesitic wallrocks. Two rock grab samples were taken from this zone. Sample R-6729 assayed 2.4 grams per tonne silver, 0.0054 per cent zinc, 0.0020 per cent lead and 0.0019 per cent copper (Assessment Report 17459).

Numerous northwest to northeast striking massive barite veins, all steeply dipping and ranging from 2 to 25 centimetres wide, occur elsewhere in the surrounding area.

Work History

The area has been historically exploration in conjunction with the nearby Electrum (MINFILE 094E 125) and Grace/VIP (MINFILE 094E 129 and 048) occurrences and a complete exploration history can be found there.

In 1985, a Golden Rule Resources Ltd. completed a program of prospecting, geological mapping and rock sampling on the area as the Jock 1-12 claims.

The Jok claims were originally staked in 1987 by Skylark Resources Ltd. who carried out regional geological mapping, prospecting, stream, soil and lithogeochemical surveys and a limited amount of trenching. In 1988 and 1989, Skylark Resources Ltd. carried out further programs of geological mapping, prospecting, geochemical and geophysical surveys and trenching on the area.

Refer to the Pine (MINFILE 094E 016) for details of the Pine property which contained the VIP (MINFILE 094E 047, 048, 049 and 129), Grace (MINFILE 094E 129) and Concha occurrences from the late 1990s to 2014. Exploration work included programs of rock and soil sampling, geological mapping and airborne geophysical surveys.

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.