An Exceptionally High-Grade Flake Graphite Project in Southern Greenland

Amitsoq Graphite, Greenland

The Amitsoq Graphite Project is located in the Nanortalik region of southern Greenland and is one of the highest-grade graphite deposits in the world, with a total inferred, indicated and measured JORC Resource of 23.05 million tonnes at an average grade of 20.41% Graphitic Carbon, giving a total graphite content of 4.71 Mt. The Resource contains a lower graphite layer that has a JORC resource of 16.88Mt at a grade of 21.51% with 3.634Mt of contained graphite. The 2023 Mineral Resource Estimate increased almost three times the tonnage from the 2022 Maiden Resource Estimate, with the contained graphite increasing by 3.08 Mt from the 2022 MRE, an increase of ca. 180%; cementing Amitsoq’s position as one of the very highest-grade graphite deposits globally. For context, deposits with compliant resources above 20% contained graphite grade are scarce, with the average global grade of graphite resources being just 8.45% according to S&P Global. 

GreenRoc is focused on fast-tracking the development of the asset to create a new, responsibly mined source of high-quality graphite that can support the rapidly growing EV battery market, where there is critical supply demand.

The Licence

Amitsoq is owned and operated by GreenRoc’s wholly owned subsidiary, Obsidian Mining Limited, under Mineral Exploration Licence 2013-06 and Mineral Exploration Licence 2022-03.

Successive field seasons have confirmed the presence of two priority target zones: the Amitsoq Island Deposit to the north, which is the site of a former graphite mine and where the current project resource has been defined, and the yet undrilled mainland Kalaaq Deposit to the south, where grades of 17.4 to 33.1% graphite have been returned.

Historic graphite occurrences have also been confirmed in four new zones of interest, broadly forming a north-south tract some 30km long.  The four zones comprise Nanortalik Island, Tusardluarnaq North and Thomsen’s Island, which sit within the southern portion of the licence, and Amitsoq Valley Bed, which lies ~7km NE of the established Amitsoq Island deposit.

On Nanortalik Island, graphitic grades of 23.4% C(g) to 32.5% C(g) have been reported from eight samples over a strike length of ~800m and the graphite bodies remain open along strike to the north and south. At Amitsoq Valley Bed, a new 1km long zone of graphite-bearing rocks with values up to 24.9% C(g) has been identified.

The Resource 

The project has a current JORC Resource of 23.05 million tonnes at an average grade of 20.41% Graphitic Carbon, giving a total graphite content of 4.71 Mt (the 2023 MRE). In the 2023 update, every Resource category increased substantially from the maiden Resource declared in 2022; the upgraded Resource now includes 1.26 Mt of Measured Resource, this being the highest confidence pre-Reserves category. The Indicated Resource has increased 200% over the 2022 MRE from 2.04 Mt to 6.12 Mt and the Inferred Resource has increased 150% over the 2022 MRE from 6.24 Mt to 15.67 Mt.

One third of the contained graphite in the 2023 MRE now falls within the higher Measured and Indicated categories, an important validation of Amitsoq’s fundamentals.

Consistently high-grade graphite intersections have been confirmed with significant mineable widths (more than 2.0m true thickness) present within graphite layers, consisting of the Lower Graphite Layer (‘LGL’) and Upper Graphite Layer (‘UGL’).

The consistency of the very high graphite grades in both of the LGL and UGL ore bodies show that Amitsoq has the potential to be a significant graphite producer. Crucially the UGL orebody remains open towards the west and south, while the LGL remains open towards the south, west and north, providing significant further upside opportunity.

Commercialisation and the EV market

Micronisation and spheronisation test work has confirmed that Amitsoq graphite easily upgrades to a high-quality spherical graphite product, exhibiting good commercial properties. Spherical graphite is used by Electric Vehicle (‘EV’) battery manufacturing companies as the anode material in EV batteries.  The anode sector is the fastest growing market for graphite and the ability to upgrade natural graphite to a high purity spherical graphite product is a prerequisite for entry into that market. Benchmark Mineral Intelligence has forecasted graphite to become in deficit this year and seriously so from 2027 and on (BMI, 2022)

Test work conducted by ProGraphite GmbH in Germany confirmed:

  • A primary concentrate product of at least 96.5% graphite can be achieved by simple flotation processing.
  • The concentrate micronised easily and with relatively little energy input, resulting in a very uniform micronised material.
  • Two spherical graphite products were then produced, with median diameters of 15 and 19 micrometers, respectively.
  • The physical target values for spherical graphite, such as narrow particle size distribution and high tap density, were achieved and exceeded.
  • Leaching of the Amitsoq spherical graphite resulted in 99.97% purity – thus exceeding the battery industry requirement of better than 99.95%.
  • Significantly this purity was achieved using alkaline leaching, which is to be preferred over the standard hydrofluoric acid leaching.

It is notable that test work found that only four flotation cleaning stages were required to reach a primary concentrate product of at least 96.5% graphite. This is very positive as it suggests that our future processing plant in Greenland will be able to run with a reduced number of cleaning stages compared to what had previously been assumed. This will shorten processing time, conserve energy and reduce the costs of production.


GreenRoc is focused on rapidly advancing Amitsoq to development status to become an important supplier of raw materials to the EV industry, with the Project strategically located to support both North American and European markets.

Based on the quality of graphite grade and thickness of deposit, coupled with the resource’s simple architecture, mine planning and the mining operations at Amitsoq are expected to be relatively simple and straightforward from a mining-technical viewpoint, with a minimum of waste rock produced. These are important factors for the construction and operation phases but also in relation to the cost implications of building a mine at Amitsoq, as energy costs could be greatly reduced.

GreenRoc has a defined strategy in place to advance Amitsoq to development status.  This includes the appointment of a number of key consultants to progress critical work studies, such as completing an Environmental Impact Assessment and a Social Impact Assessment so that formal applications for exploitation licences can be submitted to the Greenland Government.

Test work is also being undertaken to help refine the best mining methods and processing techniques whilst also developing and characterising saleable products for the EV battery market.

What is Graphite?