Summary

Mine Type	Open Pit
Stage	Restarting
Commodities	Graphite
Mining Method	Truck & Shovel / Loader
Project Timeline	...
Mine Life	...
Snapshot	Kearney Mine, one of the world’s largest confirmed graphite deposits, offers a reliable non-China supply source. It operated until 1994 and has been carefully maintained since closure. It is a fully permitted deposit with past production, existing infrastructure, and major capital investment, allowing for a rapid restart. It has strong expansion potential, supported by midstream technology to scale quickly. In 2023, G6 Energy formed an Exclusive Joint Venture with a South Korean technology partner to build a CSPG processing facility, capable of handling concentrate from Kearney and third parties. In June 2023, Kearney graphite was processed with multiple technologies, achieving >99.98% Cg purity exceeding the 99.5% requirement and meeting standards for lithium-ion batteries. G6 Energy will expand in stages, beginning with small-scale CSPG production, then 25 Ktpa and 48 Ktpa, alongside 50 Ktpa of concentrate, ultimately targeting 100,000 tonnes annually.

Deposit type

• Metamorphic

Summary:

The Mine lies within the Central Gneiss Belt (CGB) of the Grenville Province. The Grenville Province extends from Lake Huron, to the west, through Quebec and Labrador, to the east, and south into New York State. The Grenville Province in Ontario has been sub-divided into two general lithologic zones and two structural zones. These are the CGB, the Central Metasedimentary Belt (CMB), the Grenville Tectonic Zone and the CMB Tectonic Zone, respectively.

The Mine lies within the domain of the CGB. This particular domain lies within the lower thrust sheet of the CGB. Structural trends within this domain swing from east-northeast to southwest as they encounter the southern termination of the Powassan Batholith. Peltic gneisses, which host the graphitic horizons, have been traced west of Highway 11 through Algonquin Provincial Park.

High grade metamorphosed quartz-feldspar-biotite-garnet gneisses are the primary rock types in the vicinity of the graphite horizons. The lithologic unit trends tend to strike north at 20º and dip to the east at 30º to 60º.

In the McGuire West portion of the Mine, where the Open Pit is located, the graphite horizon outcrops over a width of up to 200 m and extends over a strike length of 400 m from Minnow Lake to McGuire Lake. Exploration has indicated that there are two distinct graphite horizons separated vertically by a unit differing in composition from the hanging wall and footwall gneisses. The graphitic mineralization is open along strike in both directions. Garnet-hornblendquartz feldspathic gneiss occurs on the Site as lenses up to 100 m long by 30 m wide. Graphite occurs in sporadic minor amounts. The main lithology hosting the graphite mineralization is graphite-quartz-feldspar schist. The predominant minerals are quartz, feldspar with lesser amounts of biotite and sulphides. Within this unit are discrete bands of feldspar-graphite-quartz schist (AGRA, 1994).

Mining Methods

- subscription is required.

Comminution

Crushers and Mills

Processing

- subscription is required.

Commodity Production