The Magnum Creek copper occurrence is located 1 kilometre east of Magnum Creek, 2.75 kilometres north-northwest of its junction with Delano Creek in the Muskwa Ranges of the Northern Rocky Mountains (Geology, Exploration and Mining in British Columbia 1971, Figure 11).
The occurrence is in a region known as the Muskwa Anticlinorium, a major north-northwest–trending structure characterized by moderate folding and thrust faulting. The structure consists of Middle Proterozoic (Helikian) rocks of the Muskwa Assemblage, as well as Paleozoic rocks (Geological Survey of Canada Map 1343A; Geological Society of America, Geology of North America, Volume G-2, pages 111, 639). All belong to Ancestral North America (Geological Survey of Canada Map 1713A). Northeast- to northwest-trending Proterozoic diabase dikes are common in the region.
The occurrence area is underlain by the Aida Formation of the Muskwa Assemblage, which here consists of dark-grey, calcareous and dolomitic slate, limestone and dolostone (Geology, Exploration and Mining in British Columbia 1971; Geological Survey of Canada Memoir 373). Locally, bedding dips gently and the strike is variable. Slaty cleavage dips moderately southwest. North-striking shear zones cut the rocks and contain narrow quartz-carbonate veins well mineralized with bornite and specular hematite.
A good description of mineralized float material found in creeks on the Mac 3 and 5 claims, almost certainly derived from the Magnum Creek showing immediately to the east, is given in Assessment Report 3535, pages 14 and 15.
Work History
During 1969 through 1972, Great Northern Petroleums and Mines Ltd., Mundee Mines and Vallex Mines completed programs of geological mapping, soil sampling, a 20 line-kilometre ground magnetic survey and an airborne magnetic survey on the area immediately south of the occurrence as the Lee, Ole, Shaw and Marg claims. In 1971, Churchill Copper Corp. Ltd. completed a geological mapping program on the area as the Mac, Don and ME claims. In 1979 and 1980, Halferdahl & Associates Ltd. completed a regional program of soil sampling on the area as the Tuchodi property.
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. Also in 2005, Action Minerals Inc. and Aries Resource Corp. completed a program of prospecting on the area as the Lucky Lady claims of the Trident Copper project. In 2006, Bradford Mineral Explorations Ltd. conducted 4467.0 line-kilometres airborne magnetic and electromagnetic surveys on the area as the Trident property.
In 2007, Action Minerals Inc. and Aries Resource Corp. completed a program of prospecting, geological mapping, 7 diamond drill holes, totalling 274.0 metres, and a ground electromagnetic (VLF) survey on the Missy and Angel claim groups of the Trident Copper property. Chip sampling of the southwestern lower section of the folded/brecciated zone yielded an average of 0.24 per cent copper over a 100-metre section, whereas 15 samples from the Vein 2 yielded an average of 4.35 per cent copper (Assessment Report 29756).
During 2017 through 2019, Fabled Copper Corp. completed programs of prospecting, geological mapping, rock sampling and a ground electromagnetic survey on the area as the Churchkey property. In 2021, Fable Copper Corp. completed a program prospecting, rock sampling and UAV photogrammetry surveys on the Church-Key-Neil property.
