The Joanna West mineral showing is located along the southwest ridge of Mount Gordonia, 1.2 kilometres from the summit. The showing is 290 kilometres north of Smithers. It lies within the Omineca- Cassiar mountains in the north-central portion of the Toodoggone gold camp.

The Joanna West showing is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins.

Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks. These Takla rocks have been intruded by plutons and other bodies of the mainly granodiorite to quartz monzonite Early Jurassic Black Lake Suite and are in turn unconformably overlain by or faulted against Lower Jurassic calcalkaline volcanics of the Toodoggone Formation, Hazelton Group.

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

Toodoggone volcanics, observed at the Joanna West showing, are described as purple agglomerates, grey to purple tuffs, rhyolites and orange lithic to crystal tuffs (Assessment Report 20671). The oldest rocks are light to dark green porphyritic or massive andesitic flows and pyroclastics of the Takla Group (Assessment Report 20671). These have been summarized as basaltic and andesitic flows and breccia, with minor limestone and argillite (Bulletin 86).

Propylitic alteration is widespread throughout the area surrounding the Joanna West showing, predominantly affecting andesitic flows and tuffs. These zones are characterized by chlorite alteration of plagioclase, biotite and hornblende phenocrysts, accompanied by a strong increase in epidote and/or carbonate, pyrite and magnetite in the groundmass (Assessment Report 20671).

The southwest ridge of Mount Gordonia is crossed by numerous north and northwest-trending, steeply dipping faults, with which numerous quartz veins and zones of silicification are associated. The veins are commonly mineralized with gold, silver and copper. One of these veins comprises the Joanna West showing. The quartz vein contains milky white quartz with minor propylitic alteration and is about 40 centimetres wide. Sulphides comprise up to 3 per cent, consisting of chalcopyrite and lesser pyrite; oxides comprise another 3 per cent, consisting of malachite and lesser goethite (Assessment Report 20671).

In 1985, a rock sample, taken approximately 200 metres to the northwest, assayed 0.51 gram per tonne gold, 9.4 grams per tonne silver and 1.02 per cent copper (Assessment Report 14765).

In 1988, a chip sample (33229) of quartz veining with chalcopyrite, malachite and azurite assayed 0.18 gram per tonne gold, 3.5 grams per tonne silver and 0.168 per cent copper over 0.40 metre (Assessment Report 18536).

In 1990, A grab sample (JD-012) analysed 5.65 grams per tonne gold, 15.3 grams per tonne silver and 0.61 per cent copper (Assessment Report 20671). Also at this time, chip samples (DJ-020 through -022) taken over 0.25 to 0.50 metre of quartz veining in a silicified andesite with pyrite and chalcopyrite, located approximately 150 metres to the northwest, assayed up to 0.550 gram per tonne gold, 14.0 grams per tonne silver and 0.243 per cent copper (Assessment Report 20671).

In 2004, a float sample (185257) of mineralized quartz vein material assayed 1.480 grams per tonne gold, 13.2 grams per tonne silver and 1.00 per cent copper (Assessment Report 27638).

Work History

In 1972, Alakon Metals Ltd. performed prospecting and geophysics in the area of the Joanna I and I1 claims. McKelvie (Assessment Report 2506) reported the presence of specular hematite, copper-staining and quartz veinlets in the bottom of creeks draining the cirque on the west side of Mount Gordonia.

The Joanna mineral claims were originally staked in 1985. These consisted of the Joanna I, II, III and IV (1 to 4). The Joanna I and II were also known later (or restaked) as the Gordonia and Gulch claims and held by Consolidated Harlin Resources in 1990. Joanna I and II formed the northern half and the Joanna III - IV formed the southern half. The Joanna l-4 contained the EHL (094E 036), Joanna Gold (094E 172), Joanna JD (094E 173), Joanna East (094E 174), Joanna West (094E 175), Gulch East (094E 176), Gulch West (094E 177).

In 1985, Hi-Teck Resources conducted geochemical exploration on the Joanna III and IV on behalf of the Toodoggone Syndicated. In 1985, Hi-Tec Resource conducted geochemical soil and silt sampling for Armor Development Corp on the Joanna I and II claims. In 1986, Hi-Tec Resource Management Limited performed a program of geochemical rock and soil sampling for Armor Development Corporation on the Joanna I and II claim. In 1986, International Damascus Resources conducted geophysical, geochemical and geological work on the Joanna III and IV claim. J.P. Sorbara and Associates wrote a compilation report on the Joanna property for Marian Minerals Corporation in March 1988.

In August of 1985 a program of "preliminary exploration work on the northern claims... delineated geochemically anomalous areas of interest using grid soil and stream silt geochemistry" (Assessment Report 14765). Preliminary work in 1985 on the Joanna 3 and 4 claims (the southern claims) consisted of contour soil, stream silt, panned concentrate and rock geochemistry and delineated anomalous areas of interest (Assessment Report 14765). Soil sampling delineated three areas of anomalous gold - silver - copper.

A 1986 exploration program was designed to explore the southern continuation of the gold and silver anomalies delineated in 1985 on the Joanna 1 and 2 ((Assessment Report 15338). The 1986 program delineated several geochemically anomalous areas. A program of limited prospecting was also conducted at this time. Numerous quartz veinlets were located in cirque basins on the west side of Mount Gordonia,

In 1986 Western Geophysical Aero Data Ltd. conducted a program of airborne magnetometer and VLF- electromagnetometer surveying over the Joanna III and IV claims. An east-west trending magnetic low, coincidental with an east-west valley, was delineated on the Joanna IV claim. This was postulated to be a major fault structure. A magnetic high, located 600 meters north of Joanna III was interpreted to be an intrusive plug.

Further work conducted in 1986 included "a program of soil and silt geochemistry, rock sampling, mapping and prospecting" (Assessment Report 15338, 15818) that would extend known soil anomalies. The program outlined a gold soil anomaly of approximately 300 by 300 metres in size. Two programs of ground geophysics were carried out in the same year, a magnetometer survey and a VLF-EM survey.

In 1988 a program of limited geological mapping, prospecting, rock and soil sampling was conducted on the Joanna III and IV by International Damascus Resoruces (Assessment Report 18536). The program "defined strong precious and base metal rock and soil anomalies in association with some quartz veining

In March 1988, Western Geophysical Aero Data Ltd. flew an airborne magnetometer survey over the Joanna I and II claims for Marian Minerals Corp (Assessment Report 17267).

In 1989, Marian Minerals Corp. completed a program of geological mapping and rock sampling on the Joanna I-II claims.

In 1990, Consolidated Harlin Resources collected 106 rock and 154 soil samples o the Johanna III to IV and the Gordonia and Gultch claaims.

In 1995, AGC Americas Gold Corp acquired 6 new claims totaling 120 units which tie onto the eastern boundary of their JD property (see 094E 171). This initial program was set up to sample gossans or zones of alteration seen on the property. Work was largely restricted to the Hairy in the north and Spur in the south. It resulted in the discovery of the discovery of the JD-Hairy showing (094E 235). Work on the Spur occurred in the area of the Falcon A2 (094E 185) and Falcon A1 (094E 184).

In 2004, Stealth Minerals held the Gordo Group of claims which covered the Joanna occurrences and the Falcon occurrences (094E 185 and 185) to the south and Oxide Peak occurrences (094E 179, 180 and 181) to the west. Stealth collected 854 rock samples for analysis and 274 samples were taken PIMA rock spectroscopy for alteration identification (Assessment Report 27638). Ten silt and 30 soil samples were also taken.

In 2005, Stealth Minerals Ltd. completed a further program of prospecting, geological mapping and rock sampling on the Gordo-Too-Oxide property.

In 2014, a program of prospecting and geological mapping was completed on the area as the Tod property.

In 2016, Seven Devils Exploration Ltd. completed a program of prospecting and rock sampling on the area.

In 2018, Arcwest Exploration Inc. conducted a program of geological mapping and minor rock sampling on the area.