Geomark has a 100 percent interest in approximately 7,590 acres of leased claims near the old Colomac mine, located approximately 200 km north of Yellowknife, Northwest Territories. The property hosts two small gold showings, the Main and Cass zones. Comaplex Minerals Corp. originally staked claims in the area in 1982 and Echo Bay Mines Ltd., under option to Comaplex, completed over 160 drillholes (29,300 m) of diamond drilling to define the two zones, but eventually terminated its right to earn an interest in the property.
In 1994, Royal Oak Mines Inc. optioned the property and completed additional diamond drilling (approximately 7,050 m in 85 short holes) on the Main and Cass zones with the intention of using the gold bearing rock to augment the low grade feed at the Colomac Mine, located 13 km to the northeast. Royal Oak’s intention was exploitation of the two showings through shallow, open pits. In 1996, a 13 km long road was constructed between the two properties and a small test pit started at the Cass showing. Exploration by Royal Oak was never completed due to the company (and the Colomac mine) going into receivership.
The gold mineralization at the Main zone is hosted in quartz-carbonate vein lodes associated with a fault zone at the contact between mafic volcanics and sediments of the Archean Yellowknife Supergroup. Cass zone gold mineralization is associated with tension gash type quartz veins hosted entirely in a gabbro sill. Brittle deformation dominates.
