The Delaware (L.2858) occurrence is located at an elevation of approximately 2150 metres on a east-northeast–trending ridge, in the northern headwaters of the Goat River and approximately 1.4 kilometres south-southeast of White Grouse Mountain.

Regionally, the area is underlain by siltstones, quartzites, dolomites and phyllites of the Proterozoic Aldridge, Creston and Kitchener formations of the Purcell Supergroup, intruded by a small quartz monzonite stock, possibly Cretaceous. Buff dolomites, white-grey quartzites and minor argillites of the Kitchener Formation have a northward strike and dip moderately to steeply west. The Lower Creston Formation consists mainly of laminated to thickly bedded argillites and siltites with minor fine-grained quartz wackes. The rocks are waxy green to olive in colour with tan-weathering surfaces, wavy bedding and abundant mudcracks. Rocks of the Upper Aldridge, underlying an area to the east, consist of a relatively homogeneous unit with occasional thin interbeds of light grey quartzite and laminated light and dark grey argillaceous quartzite. The intrusive stock consists of medium- to fine-grained massive biotite monzogranite. The sediments adjacent to the intrusion have been altered to produce concentric zones of biotite hornfels and siliceous siltstone.

Mineralization in the area is hosted in a number of lithologies that do not appear restricted to just one but rather seem to be controlled by structure in a north-south–trending zone. Mineralization is hosted within a broad zone of phyllitic-sericitic-carbonate–altered sediments that include a thick package of stromatolitic dolomite, argillite, siltstone and quartzite. Zones of quartz stockwork and brecciation/shearing reach widths in excess of 20 metres. These breccias have minimal offset along them by east-west–trending structure. Quartz veining/stockwork is also controlled by folding within the north-south corridor. Relatively narrow veins/structures can blowout in fold hinges to significant widths.

Locally, outcrops and old pits exposed a 0.6- to 0.9-metre wide quartz blow out zone hosting pyrite, chalcopyrite, tetrahedrite, malachite and scorodite.

In 2010, a rock sample (MK10-274) assayed 2.59 per cent copper, greater than 0.20 per cent antimony, 352 grams per tonne silver and 2.20 grams per tonne gold (Assessment Report 32263).

Work History

The area has been explored in conjunction with the nearby Copper King (L.3835; MINFILE 082FNE065) occurrence and a complete exploration history of the area can be found there.