The East Ridge occurrence is located near the headwaters of Wildhorse River, approximately 39.0 kilometres northeast of Kimberley.

The East Ridge showing area is underlain by Middle Cambrian to Upper Cambrian limestone, marble and calcareous sedimentary rocks of the Lyell, Sullivan, or Jubilee formations. These sediments are intruded by a Cretaceous stock (and as sills and dikes) consisting of granite, granodiorite, and monzonite.

Sample DD07-38 was described as a 20-metre-wide zone of “siliceous hornfels, lots of chalcopyrite, pyrite, some native copper and bornite”. Monzonite, syenite, granite, diorite and hornblendite are noted in the vicinity. Mineralization in the area, extends over an east-west distance of more than 500 metres, and is described as disseminated and as fracture-hosted. Magnetite, garnet, and skarn are reported at various locations. Sample DD07-35, 300 metres east of DD07-38, was described as a fracture-hosted chlorite-rich massive sulphide consisting of “lots of” pyrite and chalcopyrite. The host rock was described as a hornblende-rich intrusion.

Sample DD07-35 graded greater than 1 per cent copper and 44.3 grams per tonne silver (Assessment Report 29942, Appendix 3). A rough map appears to indicate the value of DD07-35 as 2.1 per cent copper (Assessment Report 29942, Rock Geochemistry map). Sample DD07-38 graded 0.5 per cent copper and 2 grams per tonne silver (Assessment Report 29942, Appendix 3).

In 2007, Ruby Red Resources Inc. collected 364 soil and 72 rock samples about 1.5 kilometres (and further) to the northeast of the April showing (082GNW049), revealing new copper, lead, zinc, and silver mineralization on their Do Drop property (see Wild Horse, 082GNW116 and Wildhorse North, 082GNW118) (Assessment Report 29942). In 2008, Ruby Red completed work on their Do Drop/Wild Horse property on or near the Hot 1 (082GNW050) showing area. Work consisted of the collection of 445 soil samples and was conducted in the area of the new showings previously found in 2007 and over the Hot 1 showing (Assessment Report 30642).

In 2010, Ruby Red Resources Inc. conducted a helicopter-borne AeroTEM System Electromagnetic and Magnetic survey in the area, referred to as the Mag High Block (Assessment Report 32077).

Refer to April (082GNW049), Hot 1 (082GNW050), and Do Drop (082GNW146) for related details.