Limestone volcanism is a rare type of volcano where lava is formed with a significant content of carbonates. Rocks associated with limestone volcanism are called carbonatites, which are known to contain rare earths.
Raw materials that are economically and strategically important to the economy, and that have a high risk of disruption in the supply lines. Rare earths are considered among the most critical.
Decommissioned mining facility in the Fen Complex where niobium was extracted between 1953 and 1965. The state was responsible for the operation via AS Norsk Bergverk.
Raw materials that are important for weapons production and defence, and that states want secure access to, or prevent the other party from obtaining. (DSD)
Extraction rights for the state's minerals are granted by the Directorate for Minerals, and means that the operator can later apply for an operating licence.