Mineral resources


Mineral Resources Table

PERC 2017

PERC 2017 is the current version of disclosure standards of the Pan-European Reserves and Resources Reporting Committee, recommended for use by the Fennoscandian Association for Metals and Minerals Professionals.

The PERC 2017 reporting standard can be downloaded from www.copperstone.se or http://www.percstandard.eu/

Copperstone is changing reporting standard from Fennoscandian Review Board (FRB) to the Pan-European Reserves and Resources Reporting Committee (PERC) “PERC Reporting Standard 2017”. The PERC Reporting Standard is an international reporting standard that has been adopted by the mining associations in Sweden (SveMin), Finland (FinnMin) and Norway (Norsk Bergindustri), to be used for exploration and mining companies within the Nordic counties. The PERC standard has more clearly defined requirements on reporting and on Competent Persons. The change to PERC-standard is a process that will require a transition period. The current report is done as far as possible is accordance with the PERC-standard, but does not claim to be fully compliant.

Regarding Copperstone Granliden and Svartliden Mineral Resources please refer to Copperstone Press Release December 20, 2018 and the ”Micon Copperstone Memo Report” attached therein.

The mineral resources quoted regarding the awarded exploitation concessions Eva (applied for in 2007) and Tvistbogruvan, are per definition historical, made before the introduction of today’s disclosure standards. The company does therefore not consider the resources as current. Certain additional work, such as twin holes, check assays and QAQC documentation are considered necessary in order to potentially convert these assets to code-compliant, in accordance with to today’s disclosure requirements. The company aims, before any mining is planned to take place, to verify the relevance and reliability of the previously reported estimates. In the case of Eva, “…based on 55 diamond core drill holes that have been drilled in a 50x50 meter pattern, which has been the basis for the calculation to define this flat lying sulphide mineralization”, as indicated by our predecessors by the time of the exploitation concession application. In the case of Tvistbo, based on some 38 drillholes. The Company has not decided upon entering an environmental permit process for either deposit, it will instead explore the Copperstone Project Area further in order to optimize the usage of the natural resources and limit the side effects of any potential mine. For more information, please refer to Copperstone Annual Report 2017 (in Swedish page 13 Tvistbogruvan and page 17 Eva) at the Company’s website.

JORC 2012

Regarding the Viscaria Mineral Resources statement please refer to https://www.sunstonemetals.com.au/mineral-resources

JORC 2012 is the current version of the disclosure standard of the Joint Ore Reserves Committee, mandatory for all companies listed on the Australian Stock Exchange, the ASX.

The Copperstone Project

Arvidsjaur Kommun, Sweden