The Spectrum 4 East occurrence is located on a ridge to the east side of a north flowing tributary on the south side of the Ryan River.
The area is underlain mainly by plutonic rocks of the Jurassic to Tertiary Coast Plutonic Complex.
Locally, copper mineralization, in the form of covellite coatings on pyrite, chalcopyrite and malachite with sphalerite occur in a possible roof pendant of meta-sedimentary or metavolcanic rocks.
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.