The Edon occurrence lies on the western flank of Ehahcezetle Mountain above Eddontenajon Lake, approximately 5 kilometres southeast of the village of Iskut. The showing occurs in the dissected highlands of the Tanzilla Plateau and is approximately 1.5 kilometres southeast of the Mabon (North Rok) developed prospect (104H 035).
The Edon showing comprises a large (1 by 1.5 kilometres) pyritic "Stain zone" containing several mineralized occurrences with visible chalcopyrite and molybdenite. The quartz monzonite stock, which intrudes unnamed Upper Triassic to Lower Jurassic fragmental feldspar porphyritic andesite, hosts the occurrences and has undergone intense quartz-sericite alteration and the introduction of tourmaline. The stock is possibly related to the Early Jurassic Rose and Edon plutons. The Stain zone lies within a well developed propylitic alteration envelope marked by abundant chlorite, epidote, and pyrite.
The Edon showing is one of seven anomalous areas with greater than 200 parts per million copper plus elevated gold in soils, determined from historic and 2017 soil sampling, that characterize a nine-kilometre-long favourable mineralized trend. The trend extends from the Mabon (North Rok) developed prospect, southeast to Ealue Lake (Press Release - Colorado Resources, November 21, 2017, January 18, 2018).
Geological mapping in 2017 extended the Mabon monzodiorite stock for approximately 2000 metres south towards the Silver Standard (104H 045) and West (104H 002) occurrences. The Mabon stock hosts an inferred resource of 142.3 million tonnes of 0.22 per cent copper and 0.26 gram per tonne gold. Prospecting, rock and soil sampling indicate that the Mabon stock extensions are also locally gold and copper mineralized and the stock may have enhanced copper-gold mineralization along its northeastern contact, proximal to the Mabon Creek fault. The Mabon Creek fault places younger hematitic Lower-Middle Jurassic Hazelton Group volcanic and tuffaceous rocks against older Upper Triassic Stuhini Group mafic volcanic rocks, and small plugs and dikes of the Edon stock locally cut the fault. This suggests that the Mabon Creek fault predates mineralization and may act as a control on copper-gold distribution (Assessment Report 37578).
The Mabon stock has been U-Pb dated at 215.8 ±3 Ma with the timing of mineralization based on Re-Os dates at 207.2 ±0.9 Ma. This suggests that the timing of mineralization is similar to Red Chris (104H 005), and forms part of a Triassic intrusive-related mineralizing event within the Iskut area. Geochronological data indicate that the Mabon stock intrudes either the Lower Hazelton volcanic rocks or rocks of the Upper Triassic, near the Hazelton-Stuhini unconformity (Assessment Report 37578).
A single drillhole tested the mineralization at depth, and the best assay was 0.05 per cent copper, 0.2 gram per tonne gold, and 0.01 per cent molybdenum (Assessment Report 8481).
In 2010, three grab samples of propylitic altered andesite breccias yielded anomalous copper values of 5226, 7267, and greater than 10,000 parts per million but only a single anomalous gold value of 14 parts per billion and no anomalous molybdenum values (Assessment Report 31817).
In late 2009, Brett Resources Inc. staked the North Rok claim group and then in mid-2010 carried out a reconnaissance-style program to test for possible extensions of the Rok-Coyote copper-gold system (104H 001, 12, 24). The program included silt sampling of creek drainages, prospecting and rock sampling of colour anomalies and known copper showings and occurrences and systematic rock chip sampling along elevation contour lines over the Edon stock and across the Plateau occurrence (104H 034).
