Results 131 to 140 of about 975 (179)

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

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 “intraorogenic” Svecofennian Herräng mafic dyke swarm in east-central Sweden: age, geochemistry and tectonic significance

Gff, 2020
The Herräng mafic dykes form an E-W-trending dyke swarm within the Bergslagen lithotectonic unit of the Svecofennian orogen in east-central Sweden. They intrude the Svecofennian supracrustal rocks and early-orogenic granitoids, but are themselves cut by ...
Åke Johansson, Andreas Karlsson
exaly   +3 more sources

The Svecofennian gabbro-hosted Koivusaarenneva magmatic ilmenite deposit, Kälviä, Finland

Mineralium Deposita, 2003
The Svecofennian Koivusaarenneva gabbro at Kalvia, Finland, is a small intrusion emplaced at 1881 Ma into tonalitic bedrock near the boundary of the Mid Finland granitoid complex. The intrusion is mainly composed of even-grained metamorphosed gabbro, which can be subdivided into three zones. The lower, middle and upper zones are recognized on the basis
Niilo K. Kärkkäinen, Theodore J. Bornhorst   +1 more
openaire   +2 more sources

A compilation of metamorphic pressure–temperature estimates from the Svecofennian province of eastern and central Sweden

Gff, 2018
Here, we present a compilation of 44 metamorphic pressure-temperature (P-T) estimates from 31 localities in the Svecofennian province of eastern and central Sweden.
Alasdair Skelton, Joakim Mansfeld, Stellan Ahlin   +2 more
exaly   +2 more sources

Intra-orogenic Svecofennian magmatism in SW Finland constrained by LA-MC-ICP-MS zircon dating and geochemistry [PDF]

Gff, 2012
We have studied plutonic rocks from the Korpo and Rauma areas of south-western Finland which can be categorized as intra-orogenic, i.e. they were intruded during a proposed extensional period between the two main Svecofennian orogenic cycles: the Fennian
Karin Högdahl, Yann Lahaye, Hugh O'Brien   +2 more
exaly   +3 more sources

Development of an in-situ magmatic dome (Svecofennian accretionnary orogen, Finland) [PDF]

, 2014
This study focuses on the formation of the 100 km wide Vaasa magmatic dome (Svecofennian orogen, Finland). It is cored by diatexite migmatites and granitoids and gradually mantled by metatexite migmatites and mica schist. Geochemical data have demonstrated that the later are the sources of the melted core.
Chopin, Francis, Korja, Annakaisa, Hölttä, Pentti   +2 more
openaire   +2 more sources

Migratory tectonic switching, western Svecofennian orogen, central Sweden: Constraints from U/Pb zircon and titanite geochronology

Precambrian Research, 2008
The Forsmark area, in the western part of the Svecofennian orogen, central Sweden, is situated between two major Palaeoproterozoic tectonic domains that show contrasting histories with respect to timing of igneous activity, ductile deformation and ...
Jenny Andersson, Fernando Corfu, Michael B Stephens   +2 more
exaly   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source