Siltstones, sandstones, greywackes and conglomerates of the Lower Jurassic Takwahoni Formation (Laberge Group) are intruded and locally hornfelsed by hornblende diorite stocks of Late Cretaceous Windy Table Complex.

From late 2013 to February 2012 IMGM International Mining Canada Inc. held a large group of claims totalling 23,313 hectares that stretched west from Trapper Lake east to the Sheslay River and south from Kowatua and Tatsatua creeks. The exploration work was focused primarily on the Tats zone (104K 155). In 2014, IMGM collected 313 stream silt samples and 75 rock samples across their property. Several samples were taken in the IMGM17 showing area. A 20 centimeters wide quartz vein hosted in biotite-amphibole granite strikes 255 degrees, dipping 85 degrees. A sample of this vein (Q923751) graded 0.51 gram per tonne gold, 15.4 grams per tonne silver and 0.37 per silver (Assessment Report 35006). Malachite was reported on a sample taken nearby.

See the Tats zone (104K 155) further details of the IMGM property. See the nearby Vine for related geological and local work history details.