History of Opemiska

QC Copper acquired the Springer and Perry properties from Ex-In, who acquired the properties in 1993 and digitized the abundance of data from Falconbridge operations. This includes ~14,500 DDH, for a total of 853,800 metres drilled (today’s value ~$50,000,000), more than 300,000 assays, and 1,000 maps and sections. Falconbridge, between 1953 and 1991, previously mined both the Springer and Perry mines. Together, they produced 23 million tonnes grading 2.4% copper and 0.3 g/t gold. 

Opemiksa Copper Complex in the 1970s, operated by Falconbridge
Opemiksa Copper Complex in the 1970s, operated by Falconbridge

QC Copper conducted a 23-hole, 3,300 metres drill program on the Springer Mine in 2019, which showed excellent near-surface and long mineralized intervals, along with disseminated potential at Springer.

QC Copper acquired the Robitaille and Cooke properties from 2736-1179 Quebec Inc., a private company, as well as the Scott property to expand its land package from 797 hectares to ~13,000 hectares providing significant upside. While Robitaille, similar to Springer and Perry, are predominantly copper projects, the Cooke Mine is a high-grade gold project with a copper by-product, producing ~320,000 ounces at 5.17 g/t gold from gold-hosted quartz veins.

Location and Infrastructure

The Opemiska Copper Complex spans ~13,000 hectares and is located in the Chibougamau region of Quebec, renowned for its mineral wealth. The property hosts four past-producing underground mines in Springer, Perry, Robitaille and Cooke–previously operated by Falconbridge. At one point, Opemiska was considered to be the company’s major copper producer. Falconbridge operated these mines from 1953 to 1991, where it produced a total of 23.6 million tonnes at 2.14% copper, 0.99 g/t gold.

Significant infrastructure exists, including a power station within the property boundary. Simultaneously, the project can be accessed easily via Highway 113, Canadian National Railway, or via airport (located approximately 20km southeast of Chapais).

Property Geology

Opemiska hosts varied styles of mineralization and is exposed to 12km of the Gwillim Fault, which goes through the property. The Gwillim Fault is a key structural control on mineralization at the Opemiska Copper Complex. The varied styles of mineralization on the property include:

  • Opemiska Cu-Au: deposits like Springer, Perry and Robitaille were the mainstay of production in the Chapais District
  • Opemiska Au-Cu: near the Gwillim Fault the same style is dominated by gold. Examples are Cooke mine, Vein #7 at Springer and the Gwillim Mine
  • Blondeau VMS: Blondeau Formation is host to numerous VMS-style occurrences in the district. Examples are the 8-5 Zone in the Cooke Mine and the Barrigan-Brosman prospects.
  • Scott-Lemoine Type VMS: Classic VMS-type deposits located at top of Waconichi Rhyolite on north and south limbs of Chibougamau anticline. This stratigraphy is present on property but has only been tested near surface.

Technical Reports

Maps & Sections

Plans and Sections from Spring 2019 Drill Program

3D Models

3D Interpretation of Opemiska Digital Database

3D Model of Springer Veins & Stopes, Sections


QC Copper conducted a 23-hole 3,300-metre drill program in Spring 2019 to test the near-surface disseminated mineralization on the property and twin some Falconbridge holes as an initial step towards validating historical drilling. Primary conclusions from the drill program included:

  1. Confirmation of near-surface disseminated mineralization with twelve mineralized intersections over or near 100 metres in length;
  2. Mineralization in areas previously thought to be unmineralized, specifically in the Hinge Zone within the rhyolite and the Southeast Zone, which delivered a 284-metre mineralized interval;
  3. Newly discovered high-grade veins outside of the previously mined envelope; and
  4. Crown pillars are thicker than anticipated.
Photo of Diamond Drill Hole OP-2010-19: 17% Copper + 1.7 g/t Gold over 3 metres
Photo of Diamond Drill Hole OP-2010-19: 17% Copper + 1.7 g/t Gold over 3 metres

Spring 2019 High-Grade Intersections

Spring 2019 Long Mineralized Intervals

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