The GIC East occurrence is located at an elevation of approximately 1540 metres on the east side of a small south-southwest–facing valley, approximately 3 kilometres west of Park Creek.
Regionally, the area lies at the eastern edge of the Intermontane Belt near the Kutcho fault and marks the boundary with rocks of the Omineca Belt. The oldest rocks in the area are a sequence of lower greenschist–grade metamorphosed sedimentary and volcanic rocks correlated based on lithological similarities to rocks of the Asitka Group found elsewhere (Geological Survey of Canada Open File 483). Fossil evidence from later regional mapping dates at least part of the sequence as Mississippian (Geological Survey of Canada Paper 80-1B, pages 207-211). A tentative Devonian to Permian age is assigned to these rocks. Five stratigraphic units have been recognized and are, from oldest to youngest: feldspathic chlorite schist; phyllite, sericite and calcareous sericite schist; massive rhyolite, chert and sericite schist; carbonate; and upper feldspathic chlorite schist. The rocks are complexly folded and have undergone at least two phases of deformation. They are predominantly calc-alkaline with minor alkaline members. The sequence is similar in many respects to rocks of the Kutcho Formation in the southeastern corner of the Cry Lake map area. To the south of the Stikine River, Lower Jurassic Toodoggone Formation (Hazelton Group) volcanic rocks and Upper Cretaceous sedimentary rocks of the Sustut Group dominate. North and east of the Stikine River valley, two Early Jurassic plutonic bodies of the Black Lake Suite intrude these rocks. One is quartz monzonite in composition and the other is diorite. Small zones and pendants of Upper Triassic Takla (Stuhini) Group are found to the east and north of the Toodoggone Formation rocks. The west-northwest–trending Grass fault is located immediately to the south and separates Asitka Group schists to the south from Upper Triassic Takla (Stuhini) Group volcanic rocks to the north.
Locally, a gossanous (jarosite- and goethite-altered) volcanic rocks host narrow quartz veins with pyrite and minor magnetite and molybdenite. The veins trend 120 to 130 degrees and dip near vertical.
Another zone of mineralization is reported approximately 1.5 kilometres to the east on an east-facing slope west of Park Creek, at an elevation of approximately 1700 metres, and comprises a gossanous zone in silicified volcanics and volcanic tuff associated with a fault hosting quartz stringers with pyrite and minor galena. The vein(s) strike 344 degrees and dip 68 degrees.
In 2007, three grab samples (90160 to 90162) yielded from 0.50 to 1.15 grams per tonne gold with 0.004 to 0.043 per cent molybdenum, whereas a sample (90053/54) from the eastern zone yielded 0.15 gram per tonne gold and 0.149 per cent copper (Assessment Report 29605).
Work History
The area has been historically explored in conjunction with the nearby Park (MINFILE 094E 028) occurrence. The earliest record of work in the area dates to 1976, when Cominco Ltd. undertook stream sediment sampling as part of a base-metals exploration program.
In 1980, Du Pont of Canada Exploration Limited staked the Park 1-3 claims and conducted a program of prospecting, rock and silt sampling and geological mapping. Several gossans were recognized, mainly associated with the intrusive contact between granodiorite and chert. The following year, Du Pont expanded their Park property, filled in gaps in their silt coverage, and took reconnaissance soil samples over the entire property. In 1982, Du Pont conducted geological mapping and a program of rock, silt and soil sampling. In 1983, Du Pont extended the magnetics/VLF survey. With this program, Du Pont’s option was vested and they formed a 50:50 joint venture on the Bill property with Cominco.
In 1987, Pacific Comox Resources Ltd. and Skylark Resources Ltd. completed a program of rock and soil sampling and a 2.1 line-kilometre ground electromagnetic (VLF) survey on the area as the Chuc 1-4 claims.
In 1995, AGC Americas Gold Corp. conducted a program soil sampling over a 900- by 1000-metre grid and minor rock sampling on the area as the Arc 1-4 claims. This survey showed the gold-copper soil geochemical anomaly to be much larger than previously known, covering an area of 500 by 900 metres and open to the east and west. This enlarged geochemical anomaly and accompanying mineralization and geophysical anomalies is referred to in this report as the ‘GIC prospect’ . In 1997, AGC Americas and Antares Mining and Exploration Corporation participated in a joint Geological Survey of Canada–industry airborne magnetic survey over the entire Toodoggone area, including the GIC occurrence.
In 2001, Rimfire Minerals Corporation acquired the Bill property and carried out a program of prospecting; rock, silt and soil sampling; core resampling and geological mapping on the area as the BT 1-3 claims. Stikine Gold Corporation optioned the Williams property from Rimfire in 2002 and carried out limited prospecting through 2003. In 2005, Rimfire carried out geochemical sampling and geological mapping on the GIC area and two outlying geochemical silt anomalies, followed by 17 kilometres of pole-dipole IP surveying on the GIC area. In 2006, Arcus Development Group Inc optioned the Williams property from Rimfire. In 2007, Equity Engineering Ltd was contracted by Rimfire to carry out a program of geological mapping, prospecting and rock, soil and silt sampling on the Williams property.
In 2014, Kiska Metals Corp. completed a program of prospecting, geological mapping and rock and soil sampling on the area.
