The EOS mineral prospect is located 670 metres north of the Finn zone (MINFILE 094E 171), approximately 5.25 kilometres north-northeast of the Kadah Lake and 3.75 kilometres south of Oxide Peak. It lies within the Omineca-Cassiar Mountains at the southern end of the Toodoggone gold camp.

The EOS 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. 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.

The EOS prospect is underlain by a thick succession of Lower Jurassic volcanics assigned to the Metsantan Member of the Toodoggone Formation. The Metsantan Member consists of latite flows with lenses of lapilli tuff, and lahar; minor volcanic sandstone and conglomerate (Bulletin 86). Immediately to the west a low angle thrust (?) fault separates volcanics of the Metsantan Member from the overlying McClair Member. The McClair Member consists of heterogeneous, lapilli to block tuff, andesitic flows and numerous cogenetic dikes and subvolcanic plugs; minor mudstone and conglomerate (Bulletin 86). Both members are dominated by flows and flow breccias around the JD-EOS prospect (Assessment report 18015). This sequence is cut by a series of steeply dipping diabasic and rhyolitic dikes.

Alteration on the EOS prospect is structurally controlled and ranges from weak propylitic to intense silicic, argillic and sericitic. Propylitic alteration is the most widespread and important alteration type of the prospect, either hosting mineralized veins or forming haloes around more intensely altered and mineralized systems. Propylitic alteration consists of replacement of plagioclase phenocrysts by epidote or hematite and mafic phenocrysts by chlorite, epidote, actinolite, talc and disseminated calcite (Assessment Report 18015).

The EOS prospect consists of a northwest-trending, steeply dipping zone of quartz-calcite veins which are hosted in propylitic altered hornblende-plagioclase andesite. Individual veins are 0.5 to 8 centimetres thick and occur in a 20 to 30-metres wide zone with a density of 2 to 10 veins per metre (Assessment Report 11843). The overall strike length of the EOS prospect extends to over 300 metres consisting of intermittent quartz-calcite stringer zones

The mineralogy of the veins is sphalerite, galena and chalcopyrite in a gangue of quartz, calcite, and pyrite (Assessment Report 11843). The mineralization is best developed adjacent to two rhyolite dikes. Overall, mineralization is erratically developed in narrow veins, separated by barren propylitic altered andesite.

In 1981, samples (71109 through 71122) from the area yielded values of up to 0.560 per cent copper, 2.53 per cent lead, 3.15 per cent zinc, greater than 50.0 grams per tonne silver and 15.7 gram per tonne gold, whereas other samples (71161 through 71164) taken near a hilltop located approximately 200 metres to the southeast yielded values of up to 7.750 grams per tonne gold, 4.8 grams per tonne silver, 0.185 per cent lead and 0.138 per cent zinc (Assessment Report 9833).

Grab sample 67818, taken in 1983 from this zone, analysed 17.7 grams per tonne gold and 47.4 grams per tonne silver (Assessment Report 11843). Another grab sample of vein material is reported to have analysed 179 grams per tonne gold and 470 grams per tonne silver (Assessment Report 18015). Other grab samples analysed as high as 12 per cent combined lead and zinc and 6.60 grams per tonne gold and 59.0 grams per tonne silver (Assessment Report 18015).

In 1994, a chip sample (145653) of mineralized quartz breccia yielded 3.35 grams per tonne gold, 34.6 grams per tonne silver, 0.337 per cent copper, 1.58 per cent lead and 0.40 per cent zinc over 0.3 metre, whereas a float sample (145646) of brecciated and limonitic andesite, taken approximately 750 metres to the east, yielded 1.28 grams per tonne gold and 14.8 grams per tonne silver (Assessment Report 23663).

In 2018, a select grab sample (100264) from a quartz lens with quartz-carbonate veining hosting pyrite, a fine-grained dark sulphide, trace amounts of chalcopyrite in blebs and malachite, located on a ridge to the northwest, assayed 0.589 gram per tonne gold, whereas nearby float samples (100261) of quartz-carbonate veining yielded up to 0.596 gram per tonne gold and 17.9 grams per tonne silver (Assessment Report 38203).

Work History

AGC Americas Gold Corporation and Antares Mining and Exploration Corp drilled 6 holes in the EOS zone. AGC acquired all the Toodoggone properties in July 1999. (Information pertaining to these 6 drillholes was not found in the 2014 MINFILE update.)

AGC is a subsidiary of Timebeat.com Enterprises Inc. Antares became Canesa Capital Corporation in September 1999.

Recent work History in the JD property included rock and large scale soil sampling in 2012 by Tower Resources and aeromagnetic surveying by Duran Ventures in 2008. A few rocks samples were collected in the EOS area. The JD soil survey was very broad and covered the EOS prospect.

Refer to JD (Finn) (094E 171) for JD property work history and geological details. The EOS prospect is part of the JD property.