Claims size: 10,600 Ha (30 contiguous claims)
Ownership: 100% owned by Metallis Resources
Acquisition: Metallis purchased the group of claims assembled by Dr. Rodney Kirkham in July 2013.
Geology: The Kirkham property lies within the Stikine Terrane, near the boundary between the Intermontane and Coast Tectonic Belts of the Canadian Cordillera. It is underlain by volcanic and sedimentary rocks of the Upper Triassic Stuhini Group and the Lower to Middle Jurassic Hazelton Group. Several intrusions believed to belong to the Early Jurassic Texas Creek Plutonic Suite or the slightly younger Eskay Porphyry have been mapped across the property.
Location & Access
Sitting within the golden triangle Kirkham is 20 km southwest of Barrick’s Gold Corp’s past-producing Eskay Creek Mine and 40 km southeast from their past producing Snip Mine; 40 km from Pretium Resources’ Brucejack deposit and 30 km from Seabridge’s KSM deposits.
The closest road access is at the past-producing Eskay Creek gold-silver mine located 20 km northeast of the property up the Unuk River. Eskay Creek is connected by 60 km of controlled-access gravel road to Highway 37 a few kilometres south of the Bob Quinn Lake airstrip.
Currently, the property is accessible by helicopter. The nearest helicopter base is at Stewart, although helicopters are commonly stationed from Bob Quinn Lake and nearby exploration projects.
The Unuk River area has attracted prospectors, geologists and entrepreneurs in search of mineral deposits since 1893 (Grove, 1986). The earliest reported work in the immediate vicinity of the 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:
Recent Work (2013 - 2016)
- Metallis purchased the group of claims comprising the property in July 2013. The original claim block was assembled by Dr. Rodney Kirkham (a world-renowned copper-gold expert) because of its excellent potential to host a wide variety of precious and base metal deposits.
- In August 2013, Metallis carried out a 50 km2 airborne EM/Mag/Spec survey over a part of the property. This survey outlined numerous targets worthy of follow up.
- On November 27, 2013, Metallis Resources expanded the Kirkham Property through the purchase of a group of mineral claims, the purchase was strategic in nature, as it was situated inside the Company’s existing Kirkham Property.
- In June 2014, Metallis further acquired an additional 2 claims known as the Achilles and King Creek claims which were also situated within the existing Kirkham Property. A heavy mineral sample collected at the mouth of a stream that drains the new claims returned a gold assay of 3847 ppb – one of the highest recorded from the Golden Triangle.
- In August 2014, Metallis commenced an exploration work program on the Company’s Kirkham Property in the Golden Triangle of northern British Columbia, focusing on the “King Anomaly”. The planned program comprises of geochemical sampling, trenching and geological mapping
- In September 2015, Metallis completed an abbreviated 2015 exploration program on the Kirkham Property comprised rock sampling and geological mapping of the southernmost part (and lowest accessible elevation) of the Hawlison Monzonite, which intrudes rocks of the Stikine Terrane. This intrusion belongs to the Texas Creek Plutonic Suite which hosts most of the copper-gold mineralization in the Golden Triangle that has a mineral endowment exceeding 100 million ounces of gold within 50 km of the Kirkham Property.
- The program also evaluated the Homer Prospect. A contour soil line was carried out between two soil lines from 1990 and 1991 that yielded anomalous Au values. The 2015 soil geochemistry produced elevated Au values in two neighboring samples, assaying 190 ppb and 450 ppb Au. Prospecting discovered a small gossanous outcrop of chloritized and pyritic andesite which returned 1.48 ppm Au and 3.1 ppm Ag.
- In 2016, the Company engaged Geotech Ltd to conduct a VTEM/magnetic/radiometric survey over a 6000 hectare portion of the property, which was not surveyed in 2013. The VTEM component of the survey is useful for delineating conductors (veins, massive sulphide lenses) down to ~400m below surface. Magnetics are useful for delineating structures and intrusions which are associated with porphyry copper-gold deposits of the Golden Triangle. Radiometrics may show potassic alteration which is associated with some mineralized occurrences. The 2016 survey identified four anomalies, which continue several hundred meters below the surface:
Fewright Creek: features an arcuate resistivity and magnetic anomaly surrounding a magnetic low. A small felsic plug has been mapped within this target. A large gossan occurs on the western side of the target. These features are interpreted to represent a classic alkaline porphyry copper-gold system that has experienced magnetite destruction in the center and propyllitic alteration around the rim. The geophysical results indicate that this anomaly increases in size with depth.
King East: comprises large coincident magnetic and resistivity anomalies.Numerous gold-bearing veins and several small felsic stocks have been mapped on the southern part of this target.
North and South Terwilligen: Are also characterized by coincident magnetic and resistivity anomalies. The propyllitic alteration minerals suggest that this target is high in the porphyry system. The geophysical modelling indicates the intrusion is quite near the surface.
The 2016 survey confirmed a fifth anomaly, a linear, very strong coincident resistivity and magnetic anomaly (King), originally identified by the 2013 survey, which is outboard from the mineralized Hawlison Porphyry. This feature is similar to the geological setting and geophysical response associated with the Snip Mine, located 40 kilometers to the northwest. The presence of a pyroclastic dome, limestone units and mineralized chert layers also could be indicative of an Eskay Creek – type VMS deposit.
All four of the coincident magnetic and resistivity anomalies fit Metallis’ model of the geophysical response from porphyry copper/gold deposits in the Golden Triangle. King East and Fewright Creek also have strong potassium anomalies. These anomalies are at least 2 kilometers in diameter, are near the surface and display proximal features such as small diorite stocks, propyllitic alteration and local mineralized veins.
Target No 1 – Porphyry
- Target No 1 is characterized by an altered and mineralized Porphyry that is, about 6 kilometers long. The geological setting is strikingly similar to several of the KSM deposits, located 20 kilometers to the east of the Kirkham Property. Seabridge’s 2016 PFS incorporates KSM’s Proven and Probable Mineral Reserves of 2.2 billion tonnes grading 0.55 grams per tonne gold, 0.21% copper and 2.6 grams per tonne silver.
- Paget Minerals tested this target in 2009 with five shallow drill holes. These holes show that the copper and gold grades increase with depth. Drill hole MD-09-01, which most deeply penetrated the monzonite reported 92.67m @ 0.217% Cu and 0.277 g/t Au at the bottom. Rock samples show improving grades down section. At the lowest exposure, twenty-two rock samples (Cliff Showing – see Figure 2) from the mineralized monzonite average 0.7 g/t gold and 0.35% copper. The magnetite, potassium feldspars, quartz veins, biotite alteration and mineralization distribution indicate that the lower part of the exposed Monzonite is proximal to the high-grade potassic core. Metallis plans to drill test the mineralized monzonite below the previous drilling intercepts.
Target No 2 – Shear-Vein (King)
- The 2016 geophysical survey confirmed a planar, very strong, coincident resistivity and magnetic anomaly (King Target) that is outboard from the mineralized Hawlison Porphyry. The probable generator of this anomaly is a mineralized shear/vein system belonging to the “INTRUSION-RELATED Au PYRRHOTITE VEINS” type categorized by the BC Geological Survey.
- A heavy mineral sample collected several hundred meters downstream from this target returned a very anomalous assay of 3847 ppb gold. Modelling of the geophysical responses indicate that they are related to a plate-like conductor that is approximately 400 m long, 15m thick and at least 220 m down-dip. This plate is 3 times the size of the Snip deposit, located 40 kilometers to the northwest of the Property.
- The Snip Mine is the best example of this class of mineralized deposits. From 1991 to 1999, the Snip Mine produced over 1.1 million ounces of gold, 429,000 ounces of silver and over 550,000 pounds of copper from 1.2 million tonnes.