The Tulin occurrence is located approximately seven kilometres southeast of Trapper Lake.

The immediate Tulin showing area is underlain by volcanic rocks of the Upper Triassic Stuhini Group, as indicated by regional geology maps. Stuhini rocks are underlain by Upper Paleozoic rocks of the Stikine Assemblage consisting of Permian limestone, marble and calcareous sedimentary rocks; Carboniferous coarse clastic sedimentary rocks; and Mississippian undivided volcanic rocks. In the region, argillite, wacke, and conglomerate turbidites of the Lower Jurassic Takwahoni Formaiton (Laberge Group) and felsic rocks of the Paleocene to Eocene Sloko Group overlie the Stuhini Group. The Stuhini rocks are intruded by granite, alkali feldspar granites and quartz phyric felsitic intrusions just east and west of the Tulin showing. A Triassic quartz dioritic batholith contact is mapped a little further south of the Tulin showing.

Several rock samples were collected by Brixton Metals Corp in 2020 in the area of the Tulin MINFILE UTM location. At this location a sample grading 1.8 per cent copper was collected (Figure 6-15, Press Release, Brixton Metals Corp., Dec.15, 2020). Several more highly copper-anomalous samples were taken within a kilometre to the south and southwest.

In 2020, Brixton Metals Corporation announced that it has entered into a purchase agreement to acquire a 100 per cent interest in the Metla mineral claim group of 6,413 hectares from Stuhini Exploration Ltd. In 2020 Brixton completed 3,025 metres of drilling in 16 core holes on the new Central Outlaw and West Outlaw zones on their Thorn property. A total of 1473 rock samples and 5588 soil samples were also collected throughout their expanded Thorn property including the Metla Target area that contains the Metla prospect the RTA-2 showing, and the new Tulin (north of RTA-2) and Metarg showings (further east) (Figure 6-15, Press Release, Brixton Metals Corp., Dec.15, 2020).

Refer to Thorn (104K 031), Chivas (104K 180), East Outlaw (104K 083) and Oban (104K 168) for details of the work history of the greater Thorn property. See Metla (104K 161) and RTA-2 (104K 193), Borge (104K 160) and Copper Ridge (104K 173) for related information.