The Spectrum 4 occurrence is located in steep terrain on a ridge, east of a large ice field to the south of the Ryan River.

The area is underlain mainly by plutonic rocks of the Jurassic to Tertiary Coast Plutonic Complex.

Locally, a series of parallel quartz veins with pyrite, averaging 10 centimetres wide and exposed over 2 metres, are hosted in a fresh (un-altered) granodiorite.

In 1981, samples assayed up to 84.0 grams per tonne silver and 9.9 grams per tonne gold (Assessment Report 9712). The following year, samples yielded up to 15.0 grams per tonne gold and 56.0 grams per tonne silver (Assessment Report 10905).

Work History

In 1973, Orequest prospected and mapped the area as the Ski claims, Ryan property. During 1979 through 1983, Great Western Petroleum completed a program of geological mapping, geochemical sampling and airborne geophysical surveys on the area as the Spectrum claims. During 2004 through 2007, TTM Resources completed a program of geological mapping, geochemical sampling and airborne geophysical surveys on the area as the Molygold project. During 2016 through 2018, Ridgeline Exploration, on the behalf of Rain Resources Corp., completed a program of rock and soil sampling and an airborne magnetic survey on the area as the Southern Spectrum property.