The Duke occurrence, composed of several quartz veins with chalcopyrite, is located 1 kilometre south of Toodoggone Lake and about 290 kilometres north of the community of Smithers.

The Duke 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.

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 Duke showing lies adjacent to a granodiorite to diorite stock of the Black Lake Suite (formerly the Omineca Intrusions) near its contact with undivided volcanics of the Hazelton Group. Hazelton Group volcanics consist of grey, green and purple feldspar porphyritic andesitic flows and pyroclastic breccias, plagioclase porphyritic andesite and augite porphyritic flows and breccias. Bedding strikes northwest and dips moderately to the northeast. Numerous pink feldspar porphyry and hornblende porphyry dikes and sills are associated with the volcanics. Numerous other small granodiorite stocks and plugs crop out in the area.

Abundant disseminated pyrite occurs in contact areas between volcanics and intrusive rocks. These are evident as prominent gossans, some of which also contain quartz veins and/or silica veins and breccias.

The Duke showing consists of several quartz veins with chalcopyrite hosted in augite porphyritic flows and breccias. These crop out on the north face, near the top, of an east-trending ridge. Sample CL-2-81-3, of a quartz and epidote vein with associated malachite and azurite, assayed 18.4 grams per tonne silver, 0.015 gram per tonne gold and 0.079 per cent copper. Sample CL-2-81-4, of a quartz vein, analyzed 13.5 grams per tonne silver, 0.02 gram per tonne gold and 0.078 per cent copper (Assessment Report 9502).

In 1980-81, work performed by Serem Ltd on their Duke 1 and 2 claim consisted of detailed silt sampling of streams draining the claims, two soil contour lines, six soil lines on a loose grid, and prospecting and mapping of the exposed areas (Assessment Report 9502). A total of 114 soil and silt samples and 15 rock samples were collected and analyzed. The Duke 1 and 2 covered the area the Gravy (094E 205), Gravy East (094E 206), To 2 (094E 212) and Duke (094E 218) occurrences.

In 1987, Skylark Resource held the Esta 1 and 2 which covered the area immediately adjacent to the north of the Duke showing. They covered a portion of the area held previously by Serem Ltd., now Cheni Gold Mines Inc. The work program comprised prospecting and preliminary geology combined with two soil sample lines totalling 5 kilometres. No mineralized showings were discovered.

The Gravy claims were previously held by Hemlo Explorations Ltd. This work seems to have occurred to the immediate south of the Duke showing area. Work on the Gravy property in 1985 consisted of grid and contour soil sampling in selected areas. The exploration program on the Gravy II and IV claims in 1985 consisted of wide-spaced contour soil sampling and grid soil sampling in two areas at the southwest corner of the property (Assessment Report 14436). Work in 1987 for Mt. Graves Explorations Inc. included reconnaissance geological mapping, stream and grid soil sampling. This work resulted in the discovery of anomalous precious metal values in rocks, silts, and soils (Assessment Report 17226).

In 2003, Stealth Minerals conducted a property-wide airborne geophysical magnetic and electromagnetic survey over the Sam property which covered the following occurrences: Graves (GWP) (094E 087), Yellow Rose (094E 203), Gravy (094E 205), Gravy East (094E 206), To 2 (094E 212) and Duke (094E 218). Rock samples were taken in the area. In 2004, Stealth completed minor sampling on the Sam claims.

See Gravy (094E 205) for details of some common property work history.