The EHL prospect is located approximately 250 metres north of Mount Gordonia, some 290 kilometres north of Smithers. It lies within the Omineca-Cassiar Mountains in the north-central portion of the Toodoggone gold camp. The EHL prospect 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. Takla volcanics have been intruded by the granodiorite to quartz monzonite Black Lake Suite of Early Jurassic age 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.

The EHL prospect lies within undivided volcanics of the Toodoggone Formation. These are described as well-bedded lapilli tuff and pyroclastic breccia, rare accretionary lapilli tuff and porphyritic andesite (Bulletin 86). At the EHL prospect they have been described as green porphyritic biotite, feldspar andesite and light green tuff (Assessment Report 18763). Immediately to the north the Takla Group volcanics consist of basalt and andesite flows, breccias with limestone and minor argillite (Bulletin 86) and Assessment Report 18763).

Alteration and mineralization at the EHL prospect consists of quartz stringers hosting disseminated, and locally massive, pyrite and chalcopyrite in silicified andesites with associated specular hematite and copper staining. In 1970, exploration in the area uncovered bornite stringers up to 16 millimetres wide in an outcrop exposure near the EHL prospect.

In 1986, two grab rock samples were taken from the EHL prospect. Sample AT-86-R-04 analysed 1.7 grams per tonne gold, 13.0 grams per tonne silver and 0.4915 per cent copper (Assessment Report 15818). Similarly, sample AT-86-R-05 analysed 0.64 gram per tonne gold, 25.2 grams per tonne silver and 1.017 per cent copper (Assessment Report 15818).

In 1989, chip samples (CR-2, FR-10 through -12) from a silicified zone in volcanic porphyry hosting disseminated pyrite and chalcopyrite yielded from 0.134 per cent copper over 2.00 metres to 0.413 per cent copper over 0.30 metre, whereas a sample (KR-7) of malachite-stained silicified andesite assayed 0.217 per cent copper (Assessment Report 18763).

In 2004, samples of mineralized quartz vein float (185332, 185338, 185404) from the area assayed 10.53, 11.25 and 21.75 grams per tonne gold; 22.2, 28.4 and 38.2 grams per tonne silver with 1.00, 0.03 and 0.321 per cent copper, respectively (Assessment Report 27638).

In 2016, four float samples (M456707, M456708, M456719, M456720) of mineralized quartz veining from the area averaged 1.44 per cent copper, 1.3 grams per tonne gold and 45 grams per tonne silver, whereas a sample from a 0.4-metre wide banded quartz-pyrite vein yielded 0.042 per cent tungsten with low base and precious metals (Assessment Report 36482).

Work History

Refer to the Joanna West showing (094E 175) for details of the Joanna property work that occurred to the immediate south.

In 2004, Stealth Minerals held the Gordo Group of claims which covered the EHL area. 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.