The San (Pop) occurrence is located on a south facing slope, north of the Barriere River, approximately 4.0 kilometres northwest of the eastern end of North Barriere Lake.

The area is underlain by a strongly porphyritic, reddish granite of the Cretaceous Baldy Batholith, which intrudes metasediments consisting of mica schists, quartzites, argillites and slates of the Upper Paleozoic Eagle Bay Assemblage.

Locally, mineralization occurs within the granite near its contact with the metasediments. Pyrite and minor galena, sphalerite and chalcopyrite occurs as blebs and streaks in a sheared quartz vein up to 1.1 metres wide along a 100 metre north east strike.

In 1979, diamond drilling yielded up to 43.1 grams per tonne silver, 1.90 per cent lead and 0.29 per cent zinc over 61 centimetres, while a surface samples assayed up to 0.34 gram per tonne gold, 277 grams per tonne silver, 0.88 per cent lead and 0.39 per cent zinc over 1 metre (Property File - C.T. Pasieka [1979-10-01]: A Diamond Drilling Report on the Pop Claim #1588).

In 1982, 6 tonnes were milled yielding 22.768 kilograms of silver, 582 kilograms of lead and 333 kilograms of zinc.

The area has been explored historically with several trenches and a short adit of unknown age. In 1966, Kamstar Mines conducted a program of diamond drilling and an electromagnetic survey. In 1979, a single hole, totalling 30.9 metres, was completed.