Humlin Property, Red Lake

The Humlin property is located 10 km northwest of Red Lake, Ontario, in the prolific Red Lake Mining District. The property consist of thirty-one staked mining claims totaling 294 units (approximately 4700 Ha).The property is accessible via watercraft in summer, ice roads in winter, and locally via bush roads.

The Humlin property covers the central portion of the Red Lake Greenstone Belt, and is transected by a broad (>1 km wide), "Mine Trend" parallel, regional-scale, northwest-trending structure referred to as the Pipestone Bay - St. Paul Bay deformation zone. The structure parallels structures observed in the Campbell and Red Lake mines area, and is considered important as a possible conduit for auriferous fluids. Numerous cross-faults have been interpreted from magnetic breaks, which may be important gold trap sites. The area is underlain by tholeiitic to komatiitic flows and ultramafic intrusions of the 2.98 to 2.96 Ga Balmer assemblage, and lesser felsic tuff and siliciclastic rocks of the 2.74 to 2.73 Ga Confederation assemblage, which overlies the Balmer assemblage on a regional unconformity. All of the major deposits in the belt are found within a few hundred metres of the unconformity, including the Madsen Mine (2.6 Moz) where mineralization is localized along the unconformity surface. The western margin of the Dome stock (2.72 Ga) underlies the southeast corner of the claim group, whereas the Killala-Baird batholith (2704 Ma) underlies the southwest corner.

Minor gold occurrences (1-5 g/t Au) are found throughout the property, and several significant multi-ounce arsenopyrite-quartz vein gold prospects occur along trend on neighbouring patents to the south that are controlled by Goldcorp (e.g. Redruth and Humlin patents). The high-grade Alcourt prospect forms a small hole in the north central portion of the Humlin Property. Hydrothermal alteration includes locally intense Fe-carbonate and fuchsite (potassic) alteration of mafic and ultramafic rocks, disseminated tourmaline in quartz-rich sedimentary rocks overlying the angular unconformity, and talc alteration of ultramafic rocks. Alteration zones are locally associated with elevated to strongly anomalous arsenic.

Key Point about the property

• Geology of Humlin based on detailed airborne magnetics and shoreline mapping
• Area exhibits permissive folded and faulted ultramafic/basaltic Balmer assemblage stratigraphy transected by major Mine Trend parallel deformation zone
• Gold occurrences on neighbouring property to south actively explored by Placer Dome
• Limited historic exploration on Rubicon claims

Related documents/websites

→ Property map - Red Lake North
→ rubiconminerals.com