The Marilyn occurrence is located between Tagish and Atlin lakes, approximately 9 kilometres northwest of the community of Atlin.

The area is underlain by Upper Mississippian to Permian ultramafic rocks and Upper Mississippian to Permian Nakina Formation basaltic volcanic rocks, both of the Cache Creek Complex. Locally, disseminated pyrite and minor mariposite occurs in strongly carbonate-altered metavolcanic rock that hosts numerous quartz-carbonate veins.

The mineralization in the area of the present-day Marilyn property was probably first discovered in 1992 by British Columbia Geological Survey geologists while conducting regional geological mapping (Open File 1992-8). In 1993, G. Lee conducted a magnetometer and VLF-EM survey along approximately 19 kilometres of regularly cut lines. This survey resulted in the delineation of several VLF conductors and magnetic lows (suspect carbonate alteration zones) on the property.

In 2009, Saturn Minerals Inc. completed a program of geological mapping and geochemical sampling. Rock samples (MK24, ML12) yielded up to 57 parts per billion gold, 32.8 parts per million silver, 1064 parts per million copper, 1893 parts per million lead, and 39 parts per million tellurium. Sample MK24 returned 47,600 parts per billion gold (Assessment Report 31246).