Results 141 to 150 of about 975 (179)

The Svecofennian orogen: a collage of microcontinents and island arcs

Geological Society, London, Memoirs, 2006
Abstract Based on an integrated study of geological and geophysical data, a tectonic model for the Palaeoproterozoic evolution of the Svecofennian orogen within the Fennoscandian Shield at the northwestern corner of the East European Craton is proposed.
Annakaisa Korja, Raimo Lahtinen, Mikko Nironen   +2 more
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A geotectonic model for the evolution of the Svecofennian Orogen

GFF, 1996
(1996). A geotectonic model for the evolution of the Svecofennian Orogen. GFF: Vol. 118, No. sup004, pp. 21-22.
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A case study of lateral spreading: the Precambrian Svecofennian Orogen

Geological Society, London, Special Publications, 2009
Abstract We have studied the crustal structures of the Palaeoproterozoic Svecofennian ( c. 1.9 Ga) Orogeny with the help of large scale seismic reflection surveys (FIRE 1–3), preliminary structural field work and geological and geophysical databases.
Annakaisa Korja, Paula Kosunen, Pekka Heikkinen   +2 more
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Late svecofennian magmatism and tectonism, Åland, Southwest Finland

Precambrian Research, 1987
Abstract The Proterozoic, late-Svecofennian, Group III Granites of Sederholm (Ava, Seglinge, Mosshaga and Lemland) form discrete complexes distributed along a NESW line across the Aland Archipelago in southwestern Finland. They were emplaced (1840-1800 Ma) after cessation of the main Svecofennian orogeny, during the subsequent long period of ...
Fred Hubbard, Nick Branigan
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U–Pb geochronological constraints of the late Svecofennian leucogranites of southern Finland

Precambrian Research, 2011
Abstract The ∼500 km long zone of late Svecofennian leucogranites in southern Finland is characterized by felsic, in places migmatitic magmatism that crosscuts older Paleoproterozoic crustal segments. SIMS and ID-TIMS U–Pb isotopic data on zircon and monazite from 15 granite and migmatite samples show that the emplacement of individual leucogranite ...
Matti Kurhila, Irmeli Mänttäri, Matti Vaasjoki, O. Tapani Rämö, Mikko Nironen   +4 more
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Calcite and dolomite relations in Svecofennian carbonate rocks

Geologiska Föreningen i Stockholm Förhandlingar, 1962
Abstract In this paper, the author summarizes his investigations into the occurence and distribution of dolomite and magnesium-silicate minerals in Svecofennian carbonate rocks. As a result of his investigations, the author has come to the conclusion that it is very probable that dolomite rocks have originated in a prehistoric sea, either by direct ...
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Polydiapirism of granitic rocks in the Svecofennian of Central Sweden

Precambrian Research, 1975
Abstract A classification of igneous intrusions from orogenic zones is presented. Depending on the tectonic appearance of the intrusions (size, structure, contacts, ect.) these are divided into epi-, meso- and catatectonic diapirs. The Svecofennian of Central Sweden has been divided into tectonic units such as batholiths and subprovinces.
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The Bothnian coupled oroclines of the Svecofennian Orogen: a Palaeoproterozoic terrane wreck

Terra Nova, 2014
AbstractThe accretion of magmatic arcs gives rise to elongate, linear orogens and is a key process in forming new continental crust. Many Precambrian continents are, however, presently equidimensional or have large areas without any clear linearity, such as the central part of the Palaeoproterozoic Svecofennian Orogen (1.92–1.77 Ga). One way of forming
Raimo Lahtinen, Stephen T. Johnston, Mikko Nironen   +2 more
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1.8 Ga Svecofennian post-collisional shoshonitic magmatism in the Fennoscandian shield

Lithos, 1998
Abstract At least 14 small (1–11 km across) 1.8 Ga Svecofennian post-collisional bimodal intrusions occur in southern Finland and Russian Karelia in a 600-km-long belt from the Aland Islands to the NW Lake Ladoga region. The rocks range from ultramafic, calc-alkaline, apatite-rich potassium lamprophyres to peraluminous HiBaSr granites, and form a ...
O Eklund, D Konopelko, H Rutanen, S Fröjdö, A.D Shebanov   +4 more
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Chapter 8 Svecofennian supracrustal rocks

2005
Publisher Summary A substantial part of the Paleoproterozoic crust of southern and central Finland is characterized by 1.92 Ga turbiditic sedimentary and - 1.90-1.88 Ga arc-type volcanic rocks. Fluvial to shallow-water sedimentary rocks, felsic schists, sedimentary carbonates, black shales, and MORB- and WPL-like basalts are locally also common.
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