De Engelse Geoloog Adrian Finch heeft aan de binnenkant van 1200 miljoen jaar oude vulkaankraters in Zuid-Groenland bewijs gevonden van de aanwezigheid van het zeldzame metaal Tantalum. Dit metaal is noodzakelijk voor de productie van batterijen van mobiele telefoons. Tot nu toe kwam vrijwel al het Tantalum uit de politiek instabiele Democratische republiek Congo. De laatste tijd is het metaal zeer schaars geworden door de enorme populariteit van mobiele telefonie. Daardoor zal de ontdekking met interesse gevolgd worden door de mobiele en electro industrie.
As a crystallographer, Dr Finch is interested in how and why these mineral deposits form inside volcanoes, but his findings will undoubtedly be of interest to electrical and mobile phone industries across the world.
Over 1200 million years ago there would have been an active volcano in the North Motzfeldt region. Since then, the top of the volcano has been stripped off by the glaciers leaving the insides or 'plumbing system' of the volcano exposed "this is the area we are interested in and the part of the volcano in which mineral deposits are sometimes found," said Dr Finch.
After extensive analysis by colleagues using sophisticated analytical techniques at St Andrews, and collaboration with Birkbeck College, London and Liverpool Hope University College, Dr Finch hopes to understand more about how and why these rare minerals formed inside the volcanoes during the Precambrian age