The Cas occurrence is located in the northerly reaches of the Cottonwood River area 35 kilometres northwest of Cassiar, immediately north of Toozaza Creek.

The rocks are predominantly metasediments and carbonates aligned against the contact with granodiorite and biotite quartz monzonite of the Early Cretaceous Cassiar batholith. The contact trends northwest through the centre of the property. Contact metamorphism is present near the intrusion but not pervasive over the entire property. Local higher grade metamorphism to greenschist facies is seen at the contact. The sediments and carbonates are likely part of the Tournaisian (lower Early Mississippian) to Permian(?) Sylvester allochthon. A series of northwest trending interbedded dolomite, limestone, argillite, greywacke and metawacke are found in the main cliff showing area. Interbeds of dolostone and fetid limestone are likely of Middle-Upper Devonian McDame Group; quartz sandstone and quartzites can be found near the contact of the batholith. Minor mudstone occurs in places. The sedimentary units appear to be a remnant of the regional stratigraphy perched upon Cassiar batholith intrusive rocks. Granodiorite and quartz biotite monzonite occur on both the east and west flanks of the sediments on the Cas property. Intrusive talus can be found below the sediments north and south of the property, implying that the property is underlain by intrusive rocks of the batholith.

Barite, sphalerite and galena occur on a north-facing cliff and is hosted in dolomite interbeds within a section of metapelites, muscovite schist and minor carbonate bands. Minor disseminated pyrite is associated with the galena and imparts centimetre-scale, rusty weathered surfaces in some outcrop. Skarn minerals are evident in places, particularly diopside, actinolite and garnet. Some dolomite beds exhibit distinct orange weathering. The sphalerite is fine to medium grained, brown to salmon pink and appears to be stratiform with mineralization in fine laminations conformable to bedding. Barite occurs in millimetre-laminations increasing to massive barite 70 centimetres thick in one observed fold nose. Pyrite, sphalerite and galena are found as medium grained traces disseminated along bedding parallel fractures within the barite. The barite itself in thicker sections, is white and coarsely crystalline. Mineralization can be traced for approximately 12 metres in one exposure but is scattered and discontinuous at other sites in the section. Lead and zinc results from rock sampling by Cominco in 1997 exceeded calibration of instrument for geochemical analysis and should be submitted for assay (Assessment Report 25341).

In 1996, the Cas claims were staked to cover a short drainage with anomalous zinc and lead values reported from a 1978 Geological Survey of Canada regional sediment sampling program. In 1997, Cominco Ltd. conducted mapping/prospecting and contour soil sampling. In 2018, on behalf of Jedway Enterprises Ltd., a photogrammetric, topographic and geophysical study was completed at a scale of 1:9131 using a geological map from assessment report 25341, a Google Earth photo, and residual total field magnetic map from MapPlace2.