publication . Article . 2005

the accretionary svecofennian orogen insight from the babel profiles

Annakaisa Korja; Pekka Heikkinen;
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  • Published: 06 Jan 2005 Journal: Precambrian Research, volume 136, pages 241-268 (issn: 0301-9268, Copyright policy)
  • Publisher: Elsevier BV
Abstract
Abstract The BABEL profiles B, C, 1–7 form a 1200 km long nearly continuous cross-section through the Svecofennides. The near-vertical marine reflection profiles display a wide range of crustal structures that can be associated with both the accretionary Svecofennian orogeny (1.96–1.75 Ga) and the following Subjotnian and Jotnian rift-stages (1.65–1.11 Ga). The Svecofennian accretionary orogeny took place when a number of micro-plates with island arc affinities and surface expression of a large archipelago accreted to the continental Karelian plate. Some of the accreting terranes seem to have had older cores that have acted as crustal indentors during the collis...
Subjects
free text keywords: Geology, Island arc, Crust, Subduction, Geochemistry, Orogeny, Continental margin, Terrane, Accretionary wedge, Svecofennian orogeny
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