The Robin occurrence is located along Blue Bird Creek in the Upper Kitsault Valley, 28.5 kilometres north of the town of Alice Arm. Zones containing argentiferous galena have been extensively explored by trenching and diamond drilling since 1918.

The area is underlain by a sequence of volcanics and sediments of the Upper Triassic Stuhini Group and the Lower Jurassic Hazelton Group. This sequence has been regionally metamorphosed to greenschist facies.

The Robin occurrence lies within bedded to massive andesitic tuffs and breccias, with minor argillite, of the Hazelton Group that dip about 40 degrees northwest. A quartz breccia vein, the Blue Bird vein, is developed in a fault that extends from the Kitsault River northeast to Kitsault Lake for 4 kilometres. The vein strikes for at least 840 metres and possibly an additional 780 metres northeast along Blue Bird Creek, which follows a portion of the fault. The vein dips between 20 and 63 degrees northwest and roughly parallels the bedded rocks. The vein is generally between 7.6 and 12.2 metres wide but is locally up to 21.3 metres wide. It contains angular tuff fragments set in a quartz matrix sparsely mineralized with pyrite and galena.

The more significant mineralization is contained in a northeast trending zone that lies within 15 metres of the footwall of the Blue Bird vein on the south bank of Blue Bird Creek. The zone is exposed in a series of trenches between elevations of 700 and 800 metres. The trenches trace the vein, up to 4.3 metres wide, for a strike length of 150 metres. This zone contains stringers of galena and pyrite with small flakes of native silver, up to 2 centimetres wide, in a pyritic bleached tuff that has undergone quartz-carbonate-sericite alteration. A 1.17 metre chip sample from a trench assayed 1920 grams per tonne silver and 10.0 per cent lead (Minister of Mines Annual Report 1951, page 93). An 8.8 metre drillhole intersection averaged 210 grams per tonne silver (Property File - Silver Butte Mines Annual Report 1968).

Southwest of this zone, about 240 metres, at an elevation of 655 metres, lies a zone of narrow vertical to steeply dipping shear zones. The north trending zone is 110 metres long, 1.2 metres wide and occurs in pyritic, bleached, quartz-carbonate-sericite altered tuff. The shear zones contain minor pyrite, galena and tetrahedrite. A 1.2 metre chip sample across the full width of the zone assayed trace gold, 1179 grams per tonne silver, 0.18 per cent copper, 0.32 per cent lead and 0.06 per cent zinc (Minister of Mines Annual Report 1968, page 58).

The property was originally located as the Tyee group in 1929. Showings of high-grade galena yielding good silver values on the south side of Blue Bird Creek were explored by a series of opencuts and a few short adits between 1930 and 1934. In 1946, the claims were relocated as the Galena group. In 1951, Transcontinental Resources Ltd. did some trenching and drilled eight holes before dropping its option on the claims. The ground was subsequently relocated as the Ace and Galena claims and Silver Butte Mines Ltd. acquired the ground in 1963. In that year and the following year, 457.2 metres of drilling was done. Prospecting in 1967 uncovered a zone yielding high silver values in the vicinity of an old surface cut on the Ace No. 2 claim. In 1968, Silver Butte Mines Ltd. completed three diamond-drill holes totalling 207.2 metres on the Ace No. 2 claim. An area underlain by a soil anomaly at 792 metres elevation was also tested by seven holes totalling 252.6 metres and some geophysical work done by a Ronka EM16.

During 2010 through 2019, Dolly Silver Corporation explored the area as apart of the Dolly Varden property. A complete property exploration history can be found at the Dolly Varden (MINFILE 103P 188) occurrence.

In 2015, Dolly Varden Silver Corporation explored the Dolly Varden property (103P 188) in two phases of exploration. Phase one consisted of extensive groundwork and included geological mapping, prospecting, lithogeochemical rock sampling and soil sampling. Data acquired during phase one helped define drill targets for the second phase. Drilling totalled 2037 metres in ten diamond-drill holes. Three holes targeted the volcanogenic massive sulphide prospective Trout Horizon at the Ace-Galena showing. All holes intercepted stratiform silver-lead-zinc mineralization. Best results include 3.15 metres grading 591 grams per tonne silver from drillhole DV15019 from 46.35 metres depth (Information Circular 2016-1, page 138).

In 2016, Dolly Varden Silver Corporation carried out surface mapping and sampling, and completed 2311 metres of diamond drilling in 13 holes. Diamond drilling was carried out on the Torbit deposit (103P 191) and in the Ace-Galena area. Drilling at Ace-Galena extended known mineralized horizons 300 metres along strike and results included 3.25 metres of 405.77 grams per tonne silver, 0.12 per cent lead and 0.16 per cent zinc within a broader intersection of 66.46 metres of 59.97 grams per tonne silver, 0.12 per cent lead and 0.10 per cent zinc (Information Circular 2017-1, page 167).