A method to evaluate REE-HFSE mineralised provinces by value creation
potential, and an example of application: Gardar REE-HFSE
province, Greenland
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Abstract
The rare earth elements and high-field-strength elements (REE-HFSE) exploration sector conducts most evaluations
at deposit and smaller scales. It is not evident how the sector performs a preceding exploration stage—rating
and prioritising REE-HFSE mineralised provinces—to determine which provinces are prospective enough to
warrant investment. Here we present an objective, repeatable, low-cost method to screen any REE-HFSE province,
as a foundation for district-scale investigations or asset evaluations. It is original for REE-HFSE screening, and
adapted from regional scale copper, cobalt and petroleum exploration, and CO2 storage, screening methods. It is
centred upon a mineralised province’s favourability for potential value creation, and to identify: (a) its main
information gaps; (b) its weakest links; (c) its exploration maturity and remaining potential category; (d) how it
compares against other REE-HFSE provinces; and (e) if further investigation is justified. This method incorporates
geoscience, strategy, economic and socio-environmental factors in a way that is understandable and directly
usable across stakeholder groups. The workflow is systematic, yet flexible enough to accommodate organisationspecific
criteria, and usable for other commodities. It provides the platform to build a global REE-HFSE province
map and database consistently across national boundaries and organisations. Categories for the extent of province
exploration maturity and remaining mineral potential are proposed. We illustrate the applicability of these
methods using the Gardar REE-HFSE Province (GRHP) of south Greenland. We conclude that it is a moderate size,
frontier province that is currently of questionable favourability for value creation. To move GRHP into a positive
favourability class, its current weak links need strengthening by research, government policy and industry
stakeholders: evaluate the mineral system; integrate all information geospatially and place it in the public domain;
help the region improve some community health and safety issues; convert some mineral resources into an Ore
Reserves category; commence mining and sales production.
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