The Bridge Zone occurrence is located on the north side of the Teihsum River, approximately 4.8 kilometres east-southeast of the river mouth. Access is by logging roads from Port Alice to the V.L. Main. From there, a gated logging road (Western Forest Products, 1994) proceeds up the Teishum River. Access has been poor due to several washouts, but the road may have been repaired over time.

The area is underlain primarily by volcanic rocks of the Lower Jurassic Bonanza Group. Carbonates of the Triassic Parson's Bay Formation are exposed in the river valley. It is these rocks that host the mineralization. Many basic to felsic dikes criss-cross the area. The overlying volcanic rocks comprise green and maroon basalt flows with some limestone interbeds. The Parson's Bay Formation carbonates exposed in the valley comprise black, thinly bedded, tuffaceous limestone, limestone agglomerate (breccia?) and reefal limestone with well-preserved shell fossils. Felsite dikes and sills intrude the limestone and are often mineralized. Later diorite dikes are also present.

The main structures are north striking shear zones with a steep dip and a conjugate set of steeply dipping shears, trending 40 degrees northeast.

Locally, a fossiliferous marble has been intruded by a gabbroic stock and diorite dikes. The limestone is contorted, bleached, silicified and skarned for approximately 150 metres from the contact. At the contact, strong graphitic shearing occurs over a 5 to 7 metre wide zone, striking northeast. The shear zone hosts quartz-carbonate veins with pyrite, sphalerite and realgar.

This area hosts at least three separate areas of mineralization:

1.) Adjacent to the contact, strong shearing occurs in a 10- metre wide zone, striking 65 degrees, and hosts quartz-carbonate veins with pyrite, sphalerite and realgar. In 1994, a sample (AR-6) assayed 3.98 grams per tonne gold, 7.9 grams per tonne silver, 0.196 per cent copper and 5.52 per cent zinc over 0.3 metre (Assessment Report 236945).

In 2005, diamond drilling on the main shear yielded the following (Assessment Report 27807):

- Hole TR-04 intersected a 6.4 metre interval, from 12.5 to 18.9 metres, containing disseminated and massive stringers of arsenopyrite and pyrite assaying 14.55 grams per tonne gold over 0.5 metre, with a weighted average of 4.18 grams per tonne gold over 2.86 metres.

- Hole TR-06 intersected a 4.58 metre interval, from 9.87 to 14.45 metres, of the same mineralized shear and assayed 6.11 grams per tonne over 1.53 metres, with a weighted average of 4.1 grams per tonne gold over 4.58 metres.

2.) Approximately 25 metres from the contact, a 1 metre wide replacement pod of massive sphalerite, chalcopyrite, pyrite and greenockite is exposed. In 1994, a sample (AR-7) assayed 6.96 grams per tonne gold, 34.3 grams per tonne silver, 2.63 per cent copper and 25.8 per cent zinc over 1 metre (Assessment Report 236945).

3.) Between 25 and 50 metres from the contact the limestone hosts numerous sphalerite-pyrite stringer veins and, in one area, banded sphalerite and galena layers over 5 metres. In 1994, a 5 by 5 metre chip sample (AR-8) assayed 8.44 per cent zinc (Assessment Report 23645).

The Teaser Vein is located approximately 200 metres north of the Bridge Zone and is exposed in a former road ballast pit. The vein is 0.3 metre wide and consists of quartz, carbonate, realgar and graphite in a shear zone along a diorite dike cutting a gabbro-diorite breccia. Realgar and small, vuggy quartz-limonite veins are also noted in the area.

Work History

Documented exploration in the area began in 1984 when the "Vancouver Island Syndicate" performed some regional geochemical surveys west of the property. This was followed by some geochemical work by Westmin in 1985 that covered the area of the showings. This work identified a strong gold geochemical anomaly in the area of Deadfall Creek (Gold Creek Zone). In 1990, Granges did some work in the area but did not pursue it aggressively. In 1994, J.W. Laird prospected the area as the A 1-4 claims. In 1997, Cascade Metals completed a program of rock and soil sampling, geological mapping and ground geophysical surveys on the area as the Teihsum River Gold project.

In 2003, J.W. Laird prospected the area as the J 1-4 claims. In 2004 and 2005, Red Lake Resources completed a program of geological sampling and three drill holes, totalling 111.56 metres. In 2007, Grande Portage Resources Ltd. completed a program of geochemical (rock, silt and soil) sampling and a 1748.1 line-kilometre airborne magnetic survey on the area as the Merry Widow and Merry Widow Extension properties. During 2011 through 2013, Homegold Resources completed limited programs of prospecting, geochemical (rock and soil) sampling and air photo geological interpretation on the area as the Raging River project. In 2020, Roughrider Exploration Ltd. completed a program of rock, silt and soil sampling on the area as the Empire Mine property.