Relationships between granite-gneiss terrains, greenstone belts and granulite belts in the archean crust of Lapland (Fennoscandia)

The Archean crust of Lapland (Fennoscandia) consists of four units (from north to south): (1) the Inarijarvi nucleus, old basement complex of gneisses and greenstones, (2) the granulite belt, thick terrigenous metasedimentary sequence intruded by small amounts of calc-alkaline plutonic rocks, (3) the Tana River belt composed of tholeiitic metavolcanics, and (4) a set of gneiss domes fringed with younger greenstone belts.