The Williams East occurrence is located at an elevation of approximately 2000 metres on a south-southwest–facing slope, approximately 7.2 kilometres northeast of Mount Albert Dease.

Regionally, the area lies at the eastern edge of the Intermontane Belt near the Kutcho fault, marking the boundary with rocks of the Omineca Belt. The oldest rocks in the area are a sequence of lower greenschist–grade metamorphosed sedimentary and volcanic rocks correlated based on lithological similarities to rocks of the Asitka Group found elsewhere (Geological Survey of Canada Open File 483). Fossil evidence from later regional mapping dates at least part of the sequence as Mississippian (Geological Survey of Canada Paper 80-1B, pages 207-211). A tentative Devonian to Permian age is assigned to these rocks. Five stratigraphic units have been recognized and are, from oldest to youngest: feldspathic chlorite schist; phyllite, sericite and calcareous sericite schist; massive rhyolite, chert and sericite schist; carbonate; and upper feldspathic chlorite schist. The rocks are complexly folded and have undergone at least two phases of deformation. They are predominantly calc-alkaline with minor alkaline members. The sequence is similar in many respects to rocks of the Kutcho Formation in the southeastern corner of the Cry Lake map area. To the south of the Stikine River, Lower Jurassic Toodoggone Formation (Hazelton Group) volcanic rocks and Upper Cretaceous sedimentary rocks of the Sustut Group dominate. Small zones and pendants of Upper Triassic Takla (Stuhini) Group are found to the east and north of the Toodoggone Formation rocks. The Asitka and Takla Group rocks have been intruded by Late Triassic and Early Jurassic quartz monzonitic rocks and Middle Jurassic granodioritic rocks.

Locally, gossanous and jarositic breccia zones associated with a major northwest-trending fault host magnetite veins and minor quartz veining with trace pyrite and chalcopyrite.

In 2007, a grab sample (90002) of intense jarositic fault breccia assayed 0.56 gram per tonne gold over 10 metres, whereas one float sample (90104) of hornfels material yielded up to 5.7 grams per tonne gold and another float sample (90056) of magnetite-pyrite-chalcopyrite-quartz vein assayed 0.8 gram per tonne gold and 1.4 per cent copper (Assessment Report 29605).

In 2017, a float sample (Q932602) of chloritic quartz vein material hosting clots of chalcopyrite assayed 6.7 grams per tonne silver and 0.587 per cent copper (Assessment Report 35663).

Work History

The area has been historically explored in conjunction with the nearby Mountain (MINFILE 094E 268) occurrence.

In 2007, Arcus Development Group and Rimfire Minerals Corporation completed a program of geological mapping and rock, silt and soil sampling on the surrounding area as the Williams property.

In 2015, Running Dog Resources Ltd. completed a program of geological mapping and rock, silt and soil sampling on the area as the Castle property. Later in the year, a lineament analysis program was conducted. In 2016, a further program of prospecting, geological mapping and rock and soil sampling was completed on the area as the Park My Bills property.