The Jen occurrence is located approximately 1 kilometre east of the west side of Cluculz Lake, 40 kilometres southeast of the community Vanderhoof and approximately 46 kilometres west of Prince George.
The area is underlain by Permian sediments of the Cache Creek group and Upper Triassic to Lower Jurassic volcanics of the Takla Group. The sediments consist mainly of cherty, siliceous, graphitic phyllite and the Takla volcanics consists mainly of massive to well-foliated andesite.
Locally, several areas of vuggy quartz veins within phyllitic and andesitic units have been identified. The area is underlain by Pennsylvanian to Triassic rock of the Cache Creek Complex. The andesites are typically pale to light green and massive to strongly foliated with weak to moderate pervasive carbonate alteration. These are sometimes interbedded with thin beds of strongly foliated argillite.
Work History
The Jen claims were originally staked by Colin Campbell in 1984 to cover an area that indicated anomalous gold geochemistry in soil and rocks. In 1985, a geochemical survey consisting of 225 soil samples was conducted. The survey identified two existing anomalies and one new anomaly was found.
In 1987, the property was optioned by Noranda Exploration Company, Limited. An exploration program consisting of 60 kilometres of flagged grid line, 50 kilometres of magnetic survey, 2 kilometres of induced polarization survey, 286 B-horizon soil samples and detailed mapping was completed in 1988. The surveys outline two potential gold-bearing anomalies but warrant further follow up. Follow-up exploration was conducted later that year and consisted of an additional 407 B-horizon soil samples, 60 kilometres of flagged grid line, 30 kilometres induced polarization survey and 8 diamond drill holes, totalling 655 metres. These surveys identified a strong northeast-southwest–trending structure outlined by gold-in-soil geochemical anomalies scattered over an area 800 metres in length and 200 metres wide. Drilling outlined several highly altered bleached zones with 2 to 15 per cent vuggy chalcedonic quartz veining with very low gold values. The highest drillhole from the 1988 assays was 1.8 grams per tonne gold over 1.0 metre (Sample 46209 from Drillhole CL-88-5; Assessment Report 19112).
In 2006, Seel Enterprises Limited collected 12 rock and 538 soil samples on its C Z claims, which covered the old Jen claim area. The samples were taken at 100-metre intervals on lines spaced 500 metres apart. The survey revealed two areas with gold anomalies.
In 2008, Rupert Seel conducted a percussion drilling program; 26 holes were drilled, totalling 366 metres. Assay results were generally low; however, further assaying and drilling was recommended for three drillholes.
In 2010, 109 soil samples and 9 rock chip samples were collected by Porpoise Bay Minerals.
The most anomalous soil sample, CZ-S111, resulted in 5.8 grams per tonne of gold; the sample also had elevated values of molybdenum, copper, zinc and arsenic that were in the 90th percentile (Assessment Report 31760).
Later in 2010, Porpoise Bay Minerals Limited conducted a small geochemical survey consisting of 37 B-horizon samples and 46 rock channel samples. The rock channel samples were generally low in gold and silver; however, there were a few anomalous copper and zinc values. Sample 20584 resulted in copper and zinc values of 111.7 parts per million and 722 parts per million, respectively (Assessment Report 32743).
