publication . Article . Other literature type . 2009

palaeoproterozoic accretionary processes in fennoscandia

Lahtinen, Raimo; Korja, Annakaisa; Nironen, Mikko; Heikkinen, Pekka;
  • Published: 01 Jan 2009 Journal: Geological Society, London, Special Publications, volume 318, pages 237-256 (issn: 0305-8719, eissn: 2041-4927, Copyright policy)
  • Publisher: Geological Society of London
Abstract Accretionary processes contributed to major continental growth in Fennoscandia during the Palaeoproterozoic, mainly from 2.1 to 1.8 Ga. The composite Svecofennian orogen covers c . 1×10 6 km 2 and comprises the Lapland–Savo, Fennia, Svecobaltic and Nordic orogens. It is a collage of 2.1–2.0 Ga microcontinents and 2.02–1.82 Ga island arcs attached to the Archaean Karelian craton between 1.92 and 1.79 Ga. Andean-type vertical magmatic additions, especially at c . 1.89 and c . 1.8 Ga, were also important in the continental growth. The Palaeoproterozoic crust is the end product of accretionary growth, continental collision and orogenic collapse. Preserved a...
free text keywords: Geology, Ocean Engineering, Water Science and Technology, Mantle (geology), Archean, Accretionary wedge, Geochemistry, Petrology, Baltic sea, Craton, geography.geographical_feature_category, geography, Island arc, Crust, Continental collision
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