Sariola large igneous province in the Fennoscandian Shield: composition, lateral zoning, melt sources

The paper discusses the distribution of basites aged 2.4 Ga within the Fennoscandian Shield. In the Kola Province, olivine-bearing dolerite dykes and differentiated sills of picritic dolerite have been recognized. Meanwhile, in both the Murmansk and Karelia Cratons there occur doleritic dykes. Additionally, volcanics from the Vetreny Belt show similar ages (2407 Ma). Within the Belomorian Province, olivine gabbro-norite dykes and differentiated intrusive bodies also formed at ~ 2.4 Ga. Hence, basites of 2.4 Ga age are widely distributed across the Fennoscandian Shield. Potential temperature conditions and composition analyses of 2.4 Ga dykes and sills within the Kola Province indicate their formation occurred under T > 1500 °C and P > 2.3 GPa, implying a possible mantleplume origin.