The Les occurrence is located north of Mahatta Creek, approximately 3.5 kilometres east of the community of Mahatta Creek.

The area is underlain by andesitic to rhyodacitic lava, tuff and breccia of the Lower Jurassic Bonanza Group. The Bonanza Group volcanics have been intruded by granodioritic stocks of the Jurassic Island Plutonic Suite.

The Les occurrence consists of disseminated to discontinues stringers of chalcopyrite, magnetite, hematite and pyrite in volcanic breccia, interbedded with fine-grained and vesicular andesite adjacent to a small hornblende-albite-diorite stock. The volcanic rocks exhibit tourmaline-argillic-carbonate and silicic alteration resulting from the intrusions.

The mineralization occurs over an area of 150 by 30 metres. Chip samples returned values of 0.15 to 0.60 per cent copper (National Mineral Inventory Card 092L5 Cu8).

Work History

From 1969 to 1970, Skaist Mines completed programs of geological mapping, geochemical sampling and geophysical surveys. In 1991, Stow Resources completed programs of prospecting, geological mapping and geochemical sampling on the Mahatta claims. During 2001 through 2006, the area was explored by S. Laurence and E. McCrossan as part of the Queen claims. Programs of prospecting, geological mapping and geochemical sampling were completed at this time. In 2014, Eden Venture Investments completed a minor program of prospecting and geochemical (rock and silt) sampling on the area as the Copper 1-4 claims of the Klootchlimmis Creek property.