The Bordvedåga beryllium deposit, Rana, Nordland County, Norway. Summary report.

Abstract

Investigations in the Høgtuva and Sjona basement windows in Nordland County were carried out from 1980 to 1990. Detailed work including drilling on the Be-deposit at Bordvedåga was done from 1984 to 1988 by NGU in cooperation with Norsulfid A\/S. The Be-deposit is located in granitic basement rocks of supposed age 1700 - 1900 M.a. The emplacement of the ore was prior to the amphibolite grade metamorphism and foliation of the basement during the Caledonian Orogeny. The deposition of Be, Sn, U, Th, Y, REE, etc. involved magmatic differentiation and hydrothermal activity. A large number of minerals phases have been identified and are listed. So far drilling has proven 350 000 tonnes of ore with average grade 0.18 % Be, and there is a potential for further reserves in the area. A pre-feasibility study for the exploitation of the deposit was started but not carried through. Flotation tests give a high grade phenacite concentrate (23 % BeO) with good recovery. This report summarizes the results and lists the reports from the investigations. All data can be made available for companies interested in exploitation.