The Jimo occurrence, discovered in 1974, is situated 11 kilometres east of Mount McNamara and 9.5 kilometres northwest of Claw Mountain, about 264 kilometres northwest of the community of Germansen Landing.

The showing 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.

Devonian-Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Stuhini Group andesite flows and pyroclastic rocks. Stuhini 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.

The Jimo area is underlain by Stuhini Group volcanic and volcaniclastic rocks striking 160 degrees and dipping 080 degrees easterly. Basalt, trachyandesites, andesites, andesite dikes, tuffs and agglomerates are locally sheared, fractured and brecciated. Ubiquitous chlorite and epidote are evidence of pervasive weak propylitic alteration. Close to the shear and breccia zones, the propylitic alteration is overprinted by argillic alteration and silicification.

Many of the shear and breccia zones are healed with quartz, calcite and hematite. Quartz and calcite veins and stockworks are common within the shear zones. Widespread oxidation has developed limonite and malachite on many fracture surfaces. Pyrite, hematite and minor chalcopyrite are disseminated throughout the units. Copper mineralization consisting of chalcopyrite, bornite, chalcocite, malachite, chrysocolla and azurite is concentrated in the shear and breccia zones. The copper minerals are often hosted within quartz-calcite veins and stockworks associated with pyrite and hematite. Galena is almost exclusively found within tuffs and brecciated tuffs.

The showing is exposed along a west-trending ridge and in the valley of a west-flowing stream. Mineralized outcrops occur sporadically over a 500 by 400 metre area along the ridge and in the valley bottom. A 9 by 4 metre quartz-calcite stockwork zone, hosted within andesite, along the ridge, yielded 0.38 per cent copper and 21.94 grams per tonne silver over 3.7 metres (Property File - Jimo File, Map 6). In 1988, a grab sample (DM-53 on Jim 1 claim) of a 20-centimetre-wide quartz-calcite vein hosted within brecciated tuff along the valley floor assayed 34.0 grams per tonne silver (Assessment Report 18465).

In 1988, on behalf of Prolific Resources Ltd., a field exploration program was completed on their 'Toodoggone' properties comprising the Stik, Fred, Adoog, Doog, Jim and Mike claims. The objective of the program was to locate and evaluate the gold potential of epithermal quartz breccia systems on the claims. Exploration consisted of extensive prospecting, geological mapping, lithogeochemical sampling (355 rock), hand trenching (1 trench, 19 metres), and soil sampling (722).