The Jacleg prospect is located about 1500 metres northwest of Lewis Creek, approximately 26 kilometres northeast of Kimberly. The showing area is underlain by rocks of the Mesoproterozoic (Helikian) Purcell Supergroup, Fort Steele Formation, consisting largely of quartzite and siltstone.
The 2003 Jacleg property exploration program included a small drill program of three holes totalling 418.9 metres. Drill hole JG03-01 and JG03-02 were located at/near the old Copper King workings and Jacleg showings respectively. Drillhole JG03-03 was located at the Goldylot showing (082GNW137) about 2 kilometres south of the Jacleg prospect. The Jacleg prospect contains the Copper King and Jacleg showings as one MINFILE occurrence due to their proximity.
This area of the Jacleg claims is underlain by relatively flat-lying stratigraphy of the Fort Steele Formation comprised mainly of massive white, gray, and yellowish quartzites with intervening narrower zones of mixed lithologies ranging from argillite to thin and medium bedded quartzites. The more massive quartzites commonly have poorly defined bedding.
At the Jacleg showing, visible gold is present in quartz veining with pyrite and dolomite in brecciated “Banded Unit” rocks. No obvious copper-staining is present at the Jacleg showing and the quartz has not been worked on (as of 2002), even though the two zones of quartz breccia (Jacleg and Copper King) are well exposed on opposite sides of a rounded knob. A “chromium-nickel” dike (lamprophyre dike?) cuts between two areas of quartz veining, possibly with a north-south strike.
The Copper King workings are developed in large quartz veins hosted by a 'Banded Unit' of mixed lithologies ranging from phyllitic argillites to thin and medium bedded siltstones; and quartzites. The workings include a shallow shaft and 2 sloughed trenches. Dump material consists mainly of coarse quartz-dolomite with pyrite and minor chalcopyrite; sampling has returned values of 6.785 and 4.455 grams per tonne gold with elevated copper, molybdenum, and silver (Assessment Report 26662).
Anomalous gold is locally associated with green-brown dike material that includes specular hematite.
Pyrite is present at numerous localities and is present within quartz veins and disseminated within wallrock. Pyrite is concentrated near or within north-northwest trending quartz breccia zones; minor chalcopyrite is locally associated with the pyrite.
At the Copper King it was reported that widely anomalous gold mineralization was hosted in copper-bearing quartz veins in the Fort Steele Formation. Drillhole JG03-01 was drilled to a depth of 119 meters, intersecting strongly silicified, sericitized and carbonate altered quartzites, siltstones and two altered mafic dikes, one near the top of the hole and one near the bottom. Quartz-carbonate veins and veinlets were scattered throughout the hole. Sample M171732 from hole JG03-01 was taken over a 0.7 metre length and graded 0.12 per cent copper and 0.5 gram per tonne silver (Assessment Report 27366). This sample was part of a larger 8.6 metre interval consisting of altered lamprophyre dike with pyrite and pyrrhotite within calcite-dolomite which contained disseminated pyrite, pyrrhotite and chalcopyrite. Hole JG03-02 was drilled approximately 140 metres west of the Copper King old-working in the Jacleg showing area where a quartz vein occurred sub-parallel to bedding and was reported to contain ‘poddy’ visible gold.
WORK HISTORY
In 2000 prospecting was conducted over much of the Jacleg and Goldylot claims of SuperGroup Holdings Ltd and M.C. Kennedy. Detailed geologic mapping was undertaken on two portions of the property where previous workers had identified gold and copper mineralization and had dug small trenches, adits, and shafts. A. total of 131 rock samples were collected and analyzed as part of the prospecting and geological mapping programs (Assessment Report 26662).
In 2000/2001, National Gold Corporation, collected sample JK-9 at the Jackleg showing located about 200 metres west of the Copper Creek drillhole. The sample graded 1.95 grams per tonne gold (Assessment Report 26905).
In the early 2000s, the Jacleg property was optioned to Chapleau Resources who conducted an exploration program consisting of surface prospecting and rock sampling, grid soil sampling and diamond drilling. A total of 113 grab and chip rock samples were collected and a total of 1604 soil samples were collected. The drill program included 3 diamond drill holes of NQ size, totaling 418.9 meters. Figure 3 and 4 show drill locations and/or Jacleg and Copper King occurrence locations (Assessment Report 27366).
This work discovered surface mineralization, consisting of auriferous narrow quartz veins which tended to be limited in strike length and which were part of larger trends of mineralized showings over several kilometers in length. These veins were thought to be related to the Wildhorse Anticline, a major north-northwest trending overturned fold structure that passes through the property. Gold on the Jacleg property was found to be related to "listwanite-altered" mafic dikes. Soil samplings identified several small gold, copper, and lead anomalies.
In 2016 to 2019, PJX Resources Inc. conducted geological mapping and rock geochemistry sampling on the Dewdney Trail Property, including the Jackleg area (Assessment Reports 36649, 38859).
Refer to Lazy 19 (082GNW059) for related information of the Jackleg property.
