The Wasa prospect is located about 3 kilometre north of Lazy Lake near Wasa Creek, approximately 32 kilometres northeast of Kimberly. The showing area is underlain by rocks of the Mesoproterozoic (Helikian) Purcell Supergroup, Fort Steele Formation consisting largely of quartzite and siltstone.
In 2005, prospecting on the Diorite portion of the Rocky Block property by Ruby Red Resources returned significant results of auriferous mineralization. Visible gold was discovered in several areas hosted within brecciated Ft. Steele quartzites and “cycle-tops”, which can be traced on both the north and south sides of Wasa creek. The best gold values came from at the WASA showing assayed 91.95 grams per tonne gold (Sample Wasa-10, Assessment Report 28268). The breccia unit has a 330-degree strike with a 36-degree dip northeast. The vein characteristics were vague but reported as limonite-pyrite-rich quartz veins with visible gold.
The breccia contains abundant quartz veining in both quartzites and siltstone “cycle-tops”; often the “cycle-tops” become ripped up and intermixed in the breccia. The breccia is often saturated with limonite and pyrite, having a very porous “boxwork” style weathering. Carbonate is the most significant alteration type associated with the breccia. The (general?) mineralogy of the veins is polymetallic with azurite, chalcopyrite, galena, malachite, scorodite, and tetrahedrite. Visible gold was noted within limonite “boxwork”, vugs, and alone in quartz. Of the 39 samples taken from the area, 21 were taken from the breccia zone, 16 of which returned values higher than 100 parts per billion gold and multigram gold was obtained from seven samples.
Refer to Wolf Creek (082GNW136), Jacleg (082GNW135), and Lazy 19 (082GNW059) showings for related geological and work history details.