Location: Golden Triangle, Northwest BC (399483 E, 6263158 N)
Mineral Deposit Type: Porphyry / Epithermal / VMS / Shear Vein Gold
Commodity: Copper, Gold, Silver, Lead, Zinc, Nickel
Size: 10,600 Ha (30 Contiguous Claims)
Exploration Completed: WV3 Remote Sensing, Mapping, Sampling (soil/rock), VTEM and Drilling (6742m)
Planned Work: Mapping, Sampling, Worldview-3, VTEM analysis and drilling
The Kirkham property lies within the Stikine Terrane, near the boundary between the Intermontane and Coast Tectonic Belts of the Canadian Cordillera. Locally, the Kirkham property lies on the western margin of the Eskay Rift with trans-tensional structures host to several metallic ore deposits in the district. It is underlain by volcanic and sedimentary rocks of the Upper Triassic Stuhini Group and the Lower to Middle Jurassic Hazelton Group. According to Kyba and Nelson (2016), the contact between these two rock formations is a key geological marker for copper-gold mineralization in the Golden Triangle. Also referred to as the “Red Line”, this marker has been traced over a strike length of 10km (north-south) on the Kirkham Property.
Location & Access
Golden Triangle Metallogeny
- Devonian to Permian, Stikine Assemblage, comprised of bi-modal volcanic rocks, clastic sedimentary rocks, and limestones.
- Late-Triassic Stuhini Group submarine volcanic (generally basaltic) and sedimentary rocks,
- Late Triassic to early Jurassic Hazelton Group of sab-aerial bi-modal volcanic rocks and volcanoclastic and clastic sedimentary rocks.
- Middle Jurassic to lower Cretaceous Bowser Lake Group north-easterly sourced, southwesterly younging clastic sedimentary rocks.
The Unuk River area has attracted prospectors, geologists and entrepreneurs in search of mineral deposits since 1893 (Grove, 1986). The earliest reported work around Kirkham property was in 1929, when “two claims [were] located, carrying free gold on the surface to the amount of $10 to the ton” (17 g/tonne) on Glacier (Fewright) Creek (BCDM Annual Report, 1929, p. C112). Exploration of the area has been concentrated in a few waves including
- Initial exploration of accessible areas in the 1920s and 1930s, on foot or float planes out of Stewart.
- Helicopter gossan reconnaissance in the 1950s and 1960s.
- Porphyry copper exploration in the 1970s.
- Gold exploration in the early 1980s and opening of Snip and Eskay Creek mines in the early 1990s.
Significant Exploration Work and Results
- Airborne magnetic survey in 1959 led to delineation of the Max iron (-copper-cobalt) deposit with an historic, non-compliant resource of 11.2 million tonnes grading 45% Fe (Minfile, 2013)
- Great Plains Development Company in 1975 and 1976, collected soil and rock chip samples between King and Fewright Creeks. The sampling defined a semi-continuous 200-300 m wide Cu-Mo soil anomaly (>180 ppm Cu, >7 ppm Mo) and 2 rock chip samples yielded 0.60% Cu and 1.28 g/t Au. The reconnaissance silt and soil samples were followed up with a soil/VLF/magnetics grid over the Cole prospect on the ridge-top between King and Terwilligen Creeks.
- Du Pont’s geochemical sampling 1981 showed a 100 x 600 m north-south Cu-Au soil anomaly (>250 ppm Cu, >100 ppb Au) which was then extended further 700 m to the south and remained open to the north and south. Although a massive pyrite boulder was discovered in the Gossan Creek, which returned 7.1 g/t Au, but no significant mineralization reported in the outcrops (Korenic, 1982).
- Placer/Skyline’s in 1983 work on the Cole prospect revealed elevated Au, Ag, As, Zn in isolated soils 500 m west of Cole Lake (Gareau, 1983).
- Cominco in 1988 reported massive pyrite lenses along the gossan creek (Adam Fault) that returned up to 9.5 g/t Au and veinlets within argillaceous siltstone in the vicinity of the fault (Westcott, 1988). Winslow Gold Corp., in late 1988 commissioned an airborne geophysical survey which extended north as far as King Creek and covered the Mt. Dunn prospect (Dvorak, 1989b). Mapping, prospecting and geochemical sampling in following year identified altered and mineralized “quartz diorite” (monzonite) south almost to Fewright Creek (Aussant and Dupre, 1989c).
- Corptech Industries Inc. in 1989 carried out a helicopter-borne VLF/magnetic survey over King and Consoat claims. They confirmed the Great Plains’ Cu-Mo soil geochemical anomaly and revealed a coincident, but slightly narrower, >100 ppb Au soil anomaly. Limited IP lines across the Evan and Cole prospects indicated two zones of high chargeability (>20 ms) near the eastern and western limits of the lines. Corptech drilled three test holes (364 m) and intersected pyritic and silicified monzonite carrying average 604 ppb Au over 14.5 m (Chapman and Dewonck, 1989; Chapman et al., 1989; Chapman et al., 1990).
- The exploration work from 1991-1991 by Canadian Industrial Minerals Corp. in the Achilles area (King East) identified four gold-in-soil anomalies with up to 3.3 g/t Au (Wesa,1990a). The trench samples to the north of King Creek returned 0.40 m @ 17.1 g/t Au and 6.0 m @ 2.0 g/t Au (source unknown) whereas soil sampling south of King Creek identified a new 5.9 g/t Au soil anomaly (Howson, 1991a).
- Rimfire Minerals in 2002 and carried out limited fieldwork on the Mt. Dunn and Cole prospects (Awmack, 2003).
- In 2006, Paget Minerals Corp. carried out extensive rock sampling (Marsden, 2007) and drilled five holes (1,587m) with their best intersection of 332 m @ 0.13% Cu and 0.18 g/t Au (Bradford, 2009).
Summary of Historic Exploration Work (1960-2009)
Metallis Exploration Work and Results 2013-2018
- In 2013, Metallis Resources acquired the Kirkham property. A 50 km2 airborne EM/Mag/Radiometric survey outlined severalgeophysical targets in the eastern claims. Metallis expanded the property by the acquisition of all other claims situated inside Kirkham Property.
- In 2014, Metallis expanded the Kirkham property with the acquisition of Achilles and King Creek claims where a heavy mineral sample returned 3.8g/t Au. Metallis commenced an exploration program focused on the “King Anomaly” and carried out regional mapping, sampling and trenching.
- In 2015, Metallis conducted geological mapping and sampling over the southernmost part of 6.5 km long Hawilson Monzonite. This intrusion belongs to the Texas Creek plutonic suite responsible for most porphyry copper-gold deposits in the Golden Triangle including the KSM cluster with an endowment of >100 million ounces of gold. Evaluation of the Homer prospect and soil geochemistry indicated elevated Au including two samples returned 0.2 and 0.4 g/t Au respectively. A gossanous outcrop of chloritized and pyritic andesite returned 1.48 g/t Au and 3.1 ppm Ag.
- Metallis Resources Inc. in 2016, engaged Geotech Ltd to conduct a VTEM/magnetic/radiometric survey over a 6000 hectare of the property, which was not surveyed in 2013. The results were interpreted for conductors related to massive sulphide lenses as well as delineate structures and potassically altered and mineralized intrusions using magnetic and radiometric signals.
- Fewright Creek represents an arcuate resistivity surrounding a mag-low that coincides with phyllic alteration, gossan, and a small felsic plug reflecting a
porphyry Cu-Au system.
- King East represent a large mag-high and resistivity-lowanomaly correlated with gold-bearing veins and felsic dikes mapped in the southern part of this
- North and South Terwilligen represent coincident magnetic and resistivity anomalies, along with propylitic alteration in the area indicate a high-level
- King Target represent a linear coincident resistivity and magnetic anomalywithin a geological setting similar to the Snip Mine, located 40-km to the
northwest. The pyroclastic dome, limestone and mineralized chert layers reflect VMS style mineralization as in the Eskay Creek.
- Metallis Resources Inc. in 2017 drilled 5 holes totaling 1648m. This program confirmed a 3-km long, north-south trending corridor of porphyry copper-gold
mineralization along the southern half of the 6-km long Hawilson monzonite overprinted by a gold-rich zones of up to 3.36 g/t (KH17-08). Meanwhile, Metallis’
geologists reviewed several other targets including
- Porphyry Cu-Au mineralization at Camp, Cole, King E and Terwilligen prospects
- Magmatic Ni-Cu mineralization at Thunder North and Thunder South
- VMS/Shear vein Au at the Natt, King and Etta prospects (Razique & Weatherup 2017).
- Based on the results from 2017 exploration and drilling program, Metallis Resources in 2018 conducted multiple high resolution VTEM surveys to identify conductors associated with porphyry Cu-Au, VMS-Shear vein Au and magmatic Ni-Cu mineralization throughout Kirkham Property. Metallis drilled 12 diamond core holes (>5000m) which expanded the Cliff target and discovered 2 gold-rich porphyry centers including Nina and Cole currently ranked as high-priority targets.
Summary of Exploration Work by Metallis Resources (2013-2019)