The Banner (Winston) occurrence is located on the north side of Furry Creek, approximately 700 metres west of the former Victoria zone of the Britannia (MINFILE 092GNW003) mine and at an elevation of 930 metres.

The Britannia district is underlain by a roof pendant of mid- Mesozoic volcanic and sedimentary rocks, within the Cenozoic to Mesozoic Coast Plutonic Complex. A broad, steeply south dipping zone of complex shear deformation and metamorphism called the Britannia shear zone crosses the pendant in a northwest direction. The Indian River shear zone, a narrow zone of foliated rocks, is sub-parallel to the Britannia shear zone and transects the northeast part of the Britannia pendant. The deformed rocks are cut by dacite dikes and several major sets of faults. The Britannia roof pendant is one of many northwest- trending bodies within and in part metamorphosed by the Coast Plutonic Complex. The pendant is comprised of fresh to weakly metamorphosed rocks with sharp contacts against plutonic rocks, and belongs to the Lower Cretaceous Gambier Group. The Coast plutonic rocks consist of older, commonly foliated bodies ranging from diorite to granodiorite and younger quartz diorite to quartz monzonite intrusions (Squamish pluton). The plutonic rocks have produced contact metamorphic aureoles up to 100 metres wide in the Britannia pendant.

Locally, siliceous cherty tuffs and agglomerate host narrow, northeast trending, stringers and pods of massive sphalerite and lesser chalcopyrite mineralization. Between the fractures the host rock has been partially replaced by sphalerite, pyrite, galena and chalcopyrite. The mineralization has been traced over an area approximately 300 metres long and up to 7.5 metres wide. Minor mineralization is also reported on the Cracker Jack Crown grant to the west- south west and on the ridge to the south east.

In 1952, sampling of the stringer sulphides yielded up to 4.8 grams per tonne silver and 4.50 per cent zinc over 0.3 metre, while a 3.0 metre sample of the ’East Centre’ area yielded 3.4 grams per tonne silver, 0.10 per cent copper and 1.5 per cent zinc (Property File - J. B. Thurber [1952-10-01]: Progress report on the Eastern Area of Britannia). The following year, samples yielded up to 0.40 per cent zinc over 2.1 metres (Property File - G. D. Markland [1953-01-01]: Progress Report on Eastern Area of Britannia 1953).

The area has been historically explored in conjunction with the nearby Britannia (MINFILE 092GNW003) mine but was held under different owners and was not explored by Britannia’s underground workings. The area was postulated to hold ore below the 4100 level of the Victoria zone. During 1984 through 1989, Minnova and Fleck Resources completed programs of geological mapping, rock sampling, electromagnetic surveys on the area as part of the Fleck Option.