The PJ 100 occurrence (Number 2 zone) is located approximately 3.5 kilometres north of the Gataga River and 9.5 kilometres south-southwest of Churchill Peak in the mountainous Muskwa Ranges of the Northern Rocky Mountains (Assessment Report 2837, Map 3).

The occurrence is in a region known as the Muskwa Anticlinorium, a major north-northwest–trending structure characterized by thrust faults and moderate folding. Rocks as old as Middle Proterozoic (Helikian) outcrop in the structure, along with Paleozoic rocks (Geological Survey of Canada Map 1343A; Geological Society of America, Geology of North America, Volume G-2, page 639). All belong to Ancestral North America (Geological Survey of Canada Map 1713A). The Middle Proterozoic rocks are pre-Windermere Supergroup and are known as the Muskwa Assemblage (Geological Society of America, Geology of North America, Volume G-2, page 111).

Northeast– to (more commonly) north-northwest–trending, steeply dipping diabase or gabbroic dikes are common in the region. These Proterozoic intrusions were structurally controlled; their presence and orientation are closely related to regionally important fault and fracture zones in the Proterozoic sedimentary rocks.

The PJ claim group is underlain mainly by the Aida Formation of the Muskwa Assemblage, comprising dolomitic siltstone, dolostone, argillaceous limestone and slaty argillite (Geological Survey of Canada Memoir 373, Paper 67-68). Slate, argillite and siltstone of the overlying Gataga Formation outcrop locally in the claim group. The strata generally strike northwest and dip moderately east or, mainly, southwest. Slaty cleavage strikes northwest and dips moderately southwest. A number of diabase dikes, 3 to 60 metres thick, are present; most strike northeast to northwest and dip moderately to steeply west. Fault and fracture zones in the sedimentary rocks also strike northeast to northwest.

The mineralized zone at the PJ 100 occurrence is closely associated with the intersection of northeast-trending and north-northwest–trending diabase dikes (Assessment Reports 2837, 5777, 10960). Fractures and quartz veins with these orientations are present, possibly within or marginal to the dikes as well as in the host sedimentary rocks. Mineralized quartz-carbonate (mainly ankerite) veins are primarily controlled by northeast-trending structures, northeast of the main intersection. They are exposed for approximately 60 metres and are generally less than 1 metre thick. The veins contain stringers or massive pods of chalcopyrite. Minor pyrite and chalcocite are also present. Chip samples taken from trenches here gave assays ranging from 1.45 per cent copper over 0.9 metre to 13 per cent copper over 0.75 metre (Assessment Report 2837). This zone is at least 75 metres long but may reach a length of approximately 300 metres southwest before being covered by overburden.

In 2005, a chip sample (B374256) from a 5-metre wide and 30-metre-long quartz vein hosting massive chalcopyrite assayed 14.25 per cent copper over 5 metres (Assessment Report 28281).

More recent work, in 2021, identified three veins in the PJ 100 occurrence area. The first vein comprises a 0.3-metre vein with 5 to 7 per cent chalcopyrite, striking 020 degrees and dipping subvertically. Approximately 30 metres east of the previous vein, a second vein is exposed hosting 6 per cent chalcopyrite. The third (non-mineralized) vein is located approximately 200 metres to the south of the previous veins and comprises a flat-lying (45-degree dip) vein with a strike of 115 degrees. A chip sample (D723524) from the first vein yielded 4.6 per cent copper over 0.3 metre, whereas a grab sample from the second (east) vein assayed 2.95 per cent copper (Assessment Report 39912).

Work History

In 1970, Windermere Exploration Ltd. completed a program of geological mapping, hand trenching and rock sampling on the area as the Bronson, PJ and Book groups of claims. Also at this time, Acroll Oil and Gas Ltd. completed a program of geological mapping on the area immediately south of the occurrence as the Andrew claims. The following year, Bralorne Can-Fer Resources completed a program of soil sampling and ground electromagnetic and induced polarization surveys on the PJ claims. In 1975, Bralorne Resources completed a program of geological mapping and geochemical (silt and soil) sampling on the Andrew, PJ and Sybil claims.

In 1981 and 1982, Coppex Syndicate completed a program of geological mapping and geochemical (rock and soil) sampling on the area as the BE and MO claim groups.

In 2005, Twenty-Seven Capital Corp. completed a regionally extensive program of geochemical (rock, silt and soil) sampling and a 9002.0 line-kilometre airborne magnetic survey on the area as the Muskwa property.

In 2012, a remote sensing and geophysical data interpretation program was completed on the area as part of the regionally extensive Northern IOCG property.

In 2020, Fabled Copper Corp. completed a minor program of rock sampling and historical data review on the area as the Bronson property. The following year, a program of photogeological interpretation, rock sampling and 1.6 line-kilometres of combined airborne magnetic and ground electromagnetic (VLF) surveys were completed on the property.