Transscandinavian Igneous Belt

The Transscandinavian Igneous Belt (Swedish: Transskandinaviska magmatiska bältet), abbreviated TIB, is one of the major lithological units of the Baltic Shield.

The Transscandinavian Igneous Belt was likely formed in an Andean-type geological environment, implying it was once parallel to a destructive plate boundary.

[1] Beneath the East European Platform the belt continues across the Baltic Sea to northeast Poland and Kaliningrad Oblast.

[3] Characteristically the granites and similar rocks of the Transscandinavian Igneous Belt are rich in alkali elements (e.g. sodium and potassium) and have porphyritic textures.

Not all rocks of the Transcandinavian Igneous Belt have a pure alkaline character, some display chemistries tending to the calc-alkaline magma series.

Geological map of the Scandinavian Peninsula and Fennoscandia :
Archean rocks of the Karelia , Belomorian , and Kola domains
Proterozoic rocks of the Karelia and Kola domains
Svecofennian Domain
Transscandinavian Igneous Belt
Timanide Orogen
Sveconorwegian Orogen (including the Western Gneiss Region )
Caledonian nappes