The Eagl 1 (South Plateau-Southwest Ponds) occurrence is located near the north side of a series of small lakes on a gentle northwest-facing slope, south of the Dease River and approximately 5.5 kilometres southeast of its junction with the Eagle River.

Regionally, the area is underlain by basaltic intrusive rocks of the Permian Slide Mountain Complex (Blue Dome fault zone). Several kilometres to the southwest alkali feldspar granite intrusive rocks of the Lower Cretaceous Cassiar Batholith are exposed.

Locally, at the South Plateau–Southwest pond zone(s) massive sphalerite-galena breccia and fine-grained pyrite veins in a manganese-iron–stained outcrop. A second zone of mineralization, referred to as Eagl West zone, located approximately 1 kilometre north of the previous zone, comprises an area of silicification and iron carbonate–altered volcanic rocks hosting (chalcedonic) quartz-clay stockworks with disseminated pyrite and lesser galena-chalcopyrite mineralization.

In 1983, three samples (32912C, 32915C and 32918C) from the Eagl West zone yielded from 0.12 to 0.80 gram per tonne gold with up to 22.0 grams per tonne silver, 1.00 per cent lead and 0.20 per cent zinc, whereas a sample (32923C) from the South Plateau zone yielded 0.22 gram per tonne gold, greater than 1.00 per zinc and greater than 100 grams per tonne silver (Assessment Report 12218).

In 1984, channel samples of subcrop from trench 6 on the South Plateau zone yielded up to 0.30 gram per tonne gold, greater than 100 grams per tonne silver, greater than 1.00 per cent zinc, 1.00 per cent lead and 0.057 per cent antimony over 4.00 metres (sample 74540E), whereas a sample (7592E) of quartz vein hosting chalcopyrite-galena mineralization from the area assayed 0.23 per cent copper 0.066 per cent antimony, 12.3 grams per tonne silver and 0.17 gram per tonne gold (Assessment Report 12495).

In 1986, diamond drilling o the South Plateau-Southwest pond zone yielded intercepts of 0.6 gram per tonne gold and 42.1 grams per tonne silver over 2.4 metres, including 2.7 grams per tonne gold and 557 grams per tonne silver over 0.15 metre in hole 1 and 0.4 gram per tonne gold and 23.6 grams per tonne silver over 1.9 metres, including 0.8 gram per tonne gold and 342 grams per tonne silver over 0.10 metre in hole 2 (Assessment Report 15839).

Work History

The area has been explored in conjunction with the nearby Eagl (MINFILE 104P 073) occurrence, 2 kilometres to the east-southeast, and a complete exploration history can be found there.