RNS Number : 4724N

GreenRoc Mining PLC

23 January 2023

GreenRoc Mining Plc / EPIC: GROC / Market: AIM / Sector: Mining

23 January 2023

GreenRoc Mining plc

("GreenRoc" or the "Company")

Amitsoq Graphite Project Update

Nearly Three Times Increase in Mineral Resource Estimate

Appointment of Sole Broker

Relinquishment of Inglefield Land licence

GreenRoc Mining plc (AIM: GROC), a company focused on the development of critical mineral projects in Greenland, is delighted to announce a very substantial increase to the mineral resource estimate ("Resource") at the Amitsoq Graphite Project in southern Greenland ("Amitsoq" or the "Project"), which has been confirmed as one of the highest-grade graphite deposits in the world.

GreenRoc is also pleased to announce that, effective today, S.P. Angel Corporate Finance LLP ("SP Angel") has been appointed as sole broker to the Company.


-- The 2023 Mineral Resource Estimate ("2023 MRE") comprises a total inferred, indicated and measured JORC Resource for the Amitsoq Island Deposit of 23.05 million tonnes (Mt) at an average grade of 20.41% Graphitic Carbon ("C(g)"), giving a total graphite content of 4.71 Mt.

   --      The 2023 MRE: 

o represents a Resource with almost three times the tonnage from the 2022 Maiden Resource Estimate (the "2022 MRE"), with the contained graphite increasing by 3.08 Mt from the 2022 MRE, an increase of ca. 180%; and

o cements Amitsoq's position as one of the very highest-grade graphite deposits globally, with an average grade of 20.41% C(g) (up from 19.75% C(g)).

-- The Amitsoq Island Deposit remains open along strike (predominantly to the north) and down dip to the west, indicating the potential for further significant Resource upgrades in the future.

   --      Every Resource category has increased substantially: 

o The upgraded Resource now includes 1.26 Mt of Measured Resource, this being the highest confidence pre-Reserves category.

o The Indicated Resource has increased from 2.04 Mt to 6.12 Mt (a 200% increase over the 2022 MRE).

o The Inferred Resource has increased from 6.24 Mt to 15.67 Mt (a c150% increase over the 2022 MRE).

-- One third of the contained graphite in the 2023 MRE now falls within the higher Measured and Indicated categories, an important validation of the Project fundamentals as GreenRoc moves this year into the development phase and into further discussions with interested customers and offtake partners.

-- The 2023 MRE incorporates the results of the extensive Phase 2 drilling programme at the Amitsoq Island Deposit which was completed in September 2022.

GreenRoc's CEO, Stefan Bernstein, commented:

"To deliver a resource update of this quantum and grade is a huge achievement for GreenRoc and underpins our confidence that our Amitsoq project meets the fundamental requirements to become a mine. Furthermore, we believe we can accelerate development in order to help meet the critical demand for new, high grade and conflict-free graphite sources and we look forward to providing further updates in relation to interested customers and offtake partners in due course.

"A JORC compliant resource of over 23 million tonnes at more than 20% graphitic carbon is a fantastic result particularly after having completed only two drilling seasons. Of particular importance is that we now have resource categories in both the Indicated and Measured categories, which imply an important increase in certainty about the Amitsoq mineral resource size and grade. Given that the deposit is open in at least two directions, there is potential for even further expansion of the resource presented today.

"It is also a great pleasure for me to announce that from today, SP Angel will act as sole broker for GreenRoc. SP Angel is a market-leading broker in the mineral raw materials industry and has many decades of experience in minerals projects all over the world. SP Angel publishes a daily newsletter typically read by around 3,000 individuals across the exploration and mining industry, investors, market analysts and politicians. We look forward to working together."

Figure 1 . Amitsoq Graphite Project in southern Greenland, showing Amitsoq Island graphite deposit (site of the former graphite mine) and Kalaaq Deposit.


The 2022 MRE, being the maiden JORC Resource at the Amitsoq Island Project, was declared in March 2022 based on 10 drill intersections drilled from three drill pads along the island's ridge during Phase 1 drilling (2022 MRE shown in Table 1). The 2023 MRE incorporates successful Phase 2 drilling completed in September 2022, where mineable widths (more than 2.0m true thickness) of graphite were present in eight intersections of the UGL and in all 19 intersections of the LGL, with graphite grades ranging from 13.52 to 24.52 Cg% . The assay results from the Phase 2 drilling programme were reported by the Company on 22 December 2022.

The 2023 MRE for Amitsoq has delivered a Measured Mineral Resource of 1.26 Mt at 22.05 % C(g) for 0.28 Mt of contained graphite, Indicated Mineral Resource of 6.12 Mt at 21.04 % C(g) for 1.29 Mt of contained graphite, and an additional Inferred Mineral Resource of 15.67 Mt at 20.04 % C(g) for 3.14 Mt of contained graphite as follows (Tables 1-3; Figures 3 and 4):

Table 1. Mineral Resources Summary (comparison between 2022 and 2023 MREs)

 Mineral Resource          Tonnes (Mt)       Graphitic Carbon       Graphite content 
  Category                                          (%)                   (Mt) 
 2022 MRE 
                         ---------------  ---------------------  --------------------- 
 Measured                       -                   -                      - 
                         ---------------  ---------------------  --------------------- 
 Indicated                     2.04               20.65                   0.42 
                         ---------------  ---------------------  --------------------- 
 Total Measured + 
  Indicated                    2.04               20.65                   0.42 
                         ---------------  ---------------------  --------------------- 
 Inferred                      6.24               19.45                   1.21 
                         ---------------  ---------------------  --------------------- 
 Total Resources               8.28               19.75                   1.63 
                         ---------------  ---------------------  --------------------- 
 2023 MRE Update 
                         ---------------  ---------------------  --------------------- 
 Measured                      1.26               22.05                   0.28 
                         ---------------  ---------------------  --------------------- 
 Indicated                     6.12               21.04                   1.29 
                         ---------------  ---------------------  --------------------- 
 Total Measured + 
  Indicated                    7.38               21.21                   1.57 
                         ---------------  ---------------------  --------------------- 
 Inferred                     15.67               20.04                   3.14 
                         ---------------  ---------------------  --------------------- 
 Total Resources              23.05               20.41                   4.71 
-----------------------  ---------------  ---------------------  --------------------- 
       1. The Mineral Resource is reported at a graphitic Carbon cut-off 
       grade of 0 (zero) C(g)%. 
       2. Mineral Resource estimates are not precise calculations being 
       dependent on the interpretation of limited information on the location, 
       shape and continuity of the occurrence and on the available sampling 
       results. Therefore, reporting of tonnage and grade figures reflects 
       this relative uncertainty and figures are rounded to appropriate 
       significant figures. As a result, some error may be incurred when 
       reporting global figures based on rounded values. 
       3. The Mineral Resource Statement presented above has been reported 
       in accordance with the requirements of the 2012 edition of the 
       Australasian Code for Reporting of Exploration Results, Mineral 
       Resources and Ore Reserves (JORC 2012 Edition). The Competent Person 
       who assumes responsibility for reporting of the Mineral Resource 
       is Dr John Arthur who is a Competent Person as defined by the JORC 
       Code 2012 Edition, having more than 5 years' experience that is 
       relevant to the style of mineralisation and type of deposit described 
       herein, and to the activity for which he accepts responsibility. 
       The effective date of the Mineral Resource statement is 1 January 
       4. Resources are not constrained other than by the geological boundary 
       limits of the mineralised unit. At this stage no consideration 
       has been made as to what tonnes and grade would be reasonably expected 
       to be extracted profitably. Notwithstanding, the Competent Person 
       considers the distance constraints in both the dip and strike directions 
       to be a reasonable approximation and expectation of potential mining 
       5. Mineral Resources which are not Ore Reserves do not have demonstrated 
       economic viability. The estimate of Mineral Resource reported may 
       be materially affected by environmental, permitting, legal, title, 
       taxation, sociopolitical, marketing, or other relevant issues. 
       6. The Inferred Mineral Resource in this estimate has a lower level 
       of confidence than that applied to the Indicated Mineral Resource 
       and must not be converted to a Ore Reserve. It is reasonably considered 
       that the majority of the Inferred Mineral Resource could be upgraded 
       to an Indicated Mineral Resource with continued exploration. 
       7. Currently, no Ore Reserves have been established for the Amitsoq 

Figure 2. High-grade LGL intercept in AM-DD-038

Table 2 breaks down the 2023 MRE by graphite layer and Resource category. The total resource includes a particularly high-grade contribution from the Lower Graphite Layer of 16.88 Mt, at a grade of 21.51% for 3.634 Mt of contained graphite, which accounts for more than 77 per cent. of the total resource.

Table 2. Breakdown of Resources per Graphite Layer and comparison with 2022 MRE

 Mineral Resource        Tonnes (Mt)   Graphitic Carbon   Graphite content 
  Category                                    (%)               (Mt) 
 2022 MRE 
                        ------------  -----------------  ----------------- 
 Upper Graphite Layer 
                        ------------  -----------------  ----------------- 
 Indicated                  0.59            18.97              0.111 
                        ------------  -----------------  ----------------- 
 Inferred                   4.02            18.61              0.748 
                        ------------  -----------------  ----------------- 
 TOTAL UGL RESOURCE         4.61            18.65              0.859 
                        ------------  -----------------  ----------------- 
 Lower Graphite Layer 
                        ------------  -----------------  ----------------- 
 Indicated                  1.45            21.32              0.309 
                        ------------  -----------------  ----------------- 
 Inferred                   2.22            20.97              0.466 
                        ------------  -----------------  ----------------- 
 TOTAL LGL RESOURCE         3.67            21.19              0.775 
                        ------------  -----------------  ----------------- 
 2023 MRE Update 
                        ------------  -----------------  ----------------- 
 Upper Graphite Layer 
                        ------------  -----------------  ----------------- 
 Indicated                  0.59            19.02              0.112 
                        ------------  -----------------  ----------------- 
 Inferred                   5.58            17.26              0.963 
                        ------------  -----------------  ----------------- 
 TOTAL UGL RESOURCE         6.17            17.43              1.075 
                        ------------  -----------------  ----------------- 
 Lower Graphite Layer 
                        ------------  -----------------  ----------------- 
 Measured                   1.26            22.05              0.277 
                        ------------  -----------------  ----------------- 
 Indicated                  5.53            21.25              1.176 
                        ------------  -----------------  ----------------- 
 Inferred                   10.09           21.58              2.178 
                        ------------  -----------------  ----------------- 
 TOTAL LGL RESOURCE         16.88           21.51              3.634 
                        ------------  -----------------  ----------------- 

Table 3 displays the highly consistent nature of the graphite grades intersected during Phase 1 + 2 drilling. The Measured Resource is unchanged from a 0% cut-off grade to a 20.5 % cut-off grade. The Total Resource only displays a marginal drop-off of Resources when using a 15 % cut-off grade. This bodes well for the resilience of the deposit in the face of potentially fluctuating graphite prices and operational cost profiles.

Table 3. Sensitivity Table

                                             Mineral Resource Category 
 Cut-Off             Measured                        Indicated                       Inferred 
          ------------------------------  ------------------------------  ------------------------------ 
           Tonnes   Graphitic   Graphite   Tonnes   Graphitic   Graphite   Tonnes   Graphitic   Graphite 
            (Mt)      Carbon     Content    (Mt)      Carbon     Content    (Mt)      Carbon     Content 
                      (Cg%)       (Mt)                (Cg%)       (Mt)                (Cg%)       (Mt) 
          -------  ----------  ---------  -------  ----------  ---------  -------  ----------  --------- 
   C(g)    1.256      22.05      0.277     6.120      21.04      1.288     15.674     20.04      3.141 
          -------  ----------  ---------  -------  ----------  ---------  -------  ----------  --------- 
  13.0%    1.256      22.05      0.277     6.120      21.04      1.288     15.627     20.06      3.135 
          -------  ----------  ---------  -------  ----------  ---------  -------  ----------  --------- 
  15.0%    1.256      22.05      0.277     6.068      21.09      1.280     14.275     20.61      2.942 
          -------  ----------  ---------  -------  ----------  ---------  -------  ----------  --------- 
  17.5%    1.256      22.05      0.277     6.005      21.14      1.270     12.976     21.06      2.733 
          -------  ----------  ---------  -------  ----------  ---------  -------  ----------  --------- 

Figures 3, 4 and 5 show the extent of the Resource categories in plan and cross-section views.


Figure 3. Plan view of UGL Resource categories; scale shown in metres


Figure 4. Plan view of LGL Resource categories; scale shown in metres


Figure 5. East-West Cross-section showing the relationship of the graphite layers and Resource categories (scale shown in metres).

Relinquishment of Inglefield Land exploration licence.

Given the recent advances of the Amitsoq graphite project and after an assessment of the Company's licence portfolio, the GreenRoc board has decided to relinquish exploration licence 2018-25 in Inglefield Land, North Greenland. This licence is at a very early stage with a high degree of risk and the Company wishes to concentrate efforts to advance the Amitsoq project to production as fast as possible.

This announcement contains inside information for the purposes of the UK Market Abuse Regulation and the Directors of the Company are responsible for the release of this announcement.

Forward Looking Statements

This announcement contains forward-looking statements relating to expected or anticipated future events and anticipated results that are forward-looking in nature and, as a result, are subject to certain risks and uncertainties, such as general economic, market and business conditions, competition for qualified staff, the regulatory process and actions, technical issues, new legislation, uncertainties resulting from potential delays or changes in plans, uncertainties resulting from working in a new political jurisdiction, uncertainties regarding the results of exploration, uncertainties regarding the timing and granting of prospecting rights, uncertainties regarding the timing and granting of regulatory and other third party consents and approvals, uncertainties regarding the Company's or any third party's ability to execute and implement future plans, and the occurrence of unexpected events.

Actual results achieved may vary from the information provided herein as a result of numerous known and unknown risks and uncertainties and other factors.

Competent Person Declaration

The information in this release that relates to Exploration Results and Mineral Resources has been reviewed by Dr John Arthur. Dr Arthur is a Fellow of The Geological Society of London and a Chartered Geologist (FGS CGeol no. 1005744) and 28 years' experience in the minerals and mining industry.

Dr Arthur has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration targets, Exploration Results, Mineral Resources and Ore Reserves", also known as the JORC Code. The JORC code is a national reporting organisation that is aligned with CRIRSCO. Dr Arthur consents to the inclusion in the announcement of the matters based on his information in the form and context in which they appear.


 Cut-Off               The minimum grade required for a mineral or metal to 
                        be economically mined (or processed). Material found 
                        to be above this grade is considered to be ore, while 
                        material below this grade is considered to be waste. 
 Graphitic             of, relating to, resembling, or having the structure 
                        of graphite. 
 Graphitic Carbon      Carbon may be present in rocks in various forms including 
  or Total Graphitic    organic carbon, carbonates or graphitic carbon. Carbon 
  Carbon (TGC)          in rocks may be reported as fixed or total carbon (i.e. 
                        organic carbon + carbon in carbonate minerals + carbon 
                        as graphite) or as graphitic carbon or total graphitic 
                        carbon (or TGC) (i.e. total carbon - (organic + carbonate 
 Indicated Resource    Definition of mineral deposit at a reasonable level 
                        of confidence. 
 Inferred Resource     Definition of mineral deposit at low level of confidence. 
 JORC                  The Australasian Code for Reporting of Exploration 
                        Results, Mineral Resources and Ore Reserves ('the JORC 
                        Code') is a professional code of practice that sets 
                        minimum standards for Public Reporting of minerals 
                        Exploration Results, Mineral Resources and Ore Reserves. 
 Maiden Mineral        The first resource estimate to be completed on a project. 
  Resource Estimate 
 Measured Resource     Definition of a mineral deposit at a high level of 
 Metallurgical         Metallurgical Testing typically uses microscopy to 
  Testing               provide important information about the structure and 
                        properties of metal and alloy samples. 
 Reserve               A Reserve is the economically mineable part of a Measured 
                        Mineral Resource and/or Indicated Mineral Resource 
 Spherical graphite    Used as the anode in lithium-ion batteries. Natural 
                        flake graphite is first purified and shaped into small 
                        spheres, at which point the material is referred to 
                        a High Purity Spherical Graphite ("HPSG"). After shaping, 
                        the natural flake graphite is purified by chemical 
                        leaching to remove impurities and raise the carbon 
                        content to above 99.95% C. 
 Strike                The direction and length of a geological feature (for 
                        example, a vein or rock formation) measured on a horizontal 


For further information, please contact:

 GreenRoc Mining Plc 
  Stefan Bernstein, CEO                   +44 20 3950 0724 
 Cairn Financial Advisers LLP (Nomad) 
  James Caithie / Sandy Jamieson / 
  Louise O'Driscoll                       +44 20 7213 0880 
 SP Angel (Broker) 
  Ewan Leggat, Charlie Bouverat           +44 20 3470 0500 
 St Brides Partners Ltd (Financial 
  PR & IR) Susie Geliher / Paul Dulieu 
  / Isabelle Morris                       +44 20 7236 1177 

About GreenRoc

GreenRoc Mining Plc is an AIM-quoted company which is developing mining projects in Greenland in critical, high-demand and high-value minerals.

Led by a group of highly experienced mining industry professionals, GreenRoc has a portfolio of 100% owned projects:

-- Amitsoq Graphite Project , one of the highest-grade graphite deposits in the world with a combined Measured, Indicated and Inferred JORC Resource of 23.05 million tonnes (Mt) at an average grade of 20.41% graphite giving a total graphite content of 4.71 Mt;

-- Thule Black Sands Ilmenite Project ('TBS'), which has an initial Mineral Resource of 19Mt@ 43.6% Total Heavy Minerals with an in-situ ilmenite grade of 8.9%;

-- Melville Bay Iron Project , which has a Mineral Resource Estimate of 67Mt at 31.4% iron and has been proven to be processable to a high-grade, 70% concentrate with low impurities.

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