Results 141 to 150 of about 749 (183)

Cooling history and age of magnetization of a deep intrusion: A new 1.7 Ga key pole and Svecofennian-post Svecofennian APWP for Baltica

Precambrian Research, 2019
A paleomagnetic and chronogical study has been performed on the Turinge gabbro-diabase formation and on a cross cutting basic dyke in central Sweden and on the Joulovaara gabbro intrusion in northe ...
Sten-Åke Elming, Paul Layer, Ulf Söderlund   +2 more
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Late Svecofennian shear zones in southwestern Finland

GFF, 2007
Abstract The bedrock of southwestern Finland is transected by a shear zone network with two dominant directions: ∼E-W and ∼N-S. The shear activity occurred after peak metamorphism and crustal melting at 1840-1810 Ma. The shear zones began to form as a consequence of north vergent oblique continent-continent collision and accommodated the resulting ...
Markku Väisänen, Pietari Skyttä
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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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REE-patterns of some Svecofennian migmatite leucosomes

Gff, 1991
Abstract REE-patterns obtained from leucosomes of migmatites found in the southern Svecofennian Domain are of two types: one with (La/Lu)N 10. No systematic differences can be found between migmatite leucosomes and Upper Svecofennian granites from the same area.
Lena Mathiasson, Anders Lindh
exaly   +2 more sources

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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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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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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Chemical composition of Late Svecofennian granite in the Bothnian Basin, central Sweden

Gff, 2014
Late Svecofennian granite is frequent in the Bothnian Basin, especially in zones of rapidly changing metamorphic grade but also in areas, where the metamorphic grade is elevated. The granite is essentially undeformed, but weakly foliated or lineated rocks are common; more rarely are rocks strongly foliated. X-ray fluorescence was used for major-element
Anders Lindh
exaly   +2 more sources

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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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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