Results 151 to 160 of about 975 (179)

The depositional evolution of the Svecofennian supracrustal sequence in Finland and Sweden

Precambrian Research, 1987
Abstract On the basis of six new zircon ages from metavolcanic rocks, together with other isotopic, geophysical and geological data, the chronological and tectono-stratigraphic evolution of the early Proterozoic Svecofennian supracrustal rocks in Finland and Sweden are discussed.
openaire   +1 more source

Structural evolution of the accretional continental margin of the Paleoproterozoic Svecofennian orogen in southern Sweden

Tectonophysics, 2001
Abstract Volcanic and sedimentary rocks of the Vastervik and Valdemarsvik groups along the southern margin of the 1.90–1.85 Ga south Svecofennian crustal province in Sweden have been migmatised and intruded by granitoids and gabbros during extension (deformation phase D1), at a depth of at least 10 km.
Beunk, F.F., Page, L.M.
openaire   +2 more sources

Petrography and whole-rock geochemical characteristics of Västervik granitoids to syenitoids, southeast Sweden: constraints on petrogenesis and tectonic setting at the southern margin of the Svecofennian domain

Gff, 2011
Granitoid to syenitoid petrogenesis along the Laurentia-Baltica continental margin occurred in two cycles. Within the Fennoscandian Shield, the first cycle is correlated with the 1.95-1.8 Ga Svecofennian domain and the second is correlated with the 1.85 ...
Nolte, Nicole, I. C. Kleinhanns, W. Baero, B. T. Hansen, Kleinhanns, Ilka C., Hansen, Bent T., N. Nolte, Baero, Wiebke   +7 more
exaly   +2 more sources

Settings of Meteorite Impact Structures in the Svecofennian Crustal Domain

2005
The Svecofennian Domain, located on the western part of the East European Craton, is a uniform crustal segment with an age of the basement of ~1.9 Ga. Together with younger (1.5 – 1.8 Ga) transition zones it occupies an area of ~1.56 × 106 km2. The domain unites shield and platform areas including the submerged Baltic Sea.
Väino Puura, Jüri Plado
openaire   +1 more source

Svecofennian detrital zircon ages—implications for the Precambrian evolution of the Baltic Shield

Precambrian Research, 1993
Metasediments intruded by 1.90-1.87 Ga old plutonic rocks form the oldest major Proterozoic crustal component in the Svecofennian Domain of the Baltic (Fennoscandian) Shield. Their NdTDM model ages and conventional multigrain zircon UPb ages between 2.4 and 2.1 Ga have previously been interpreted either as mixing ages between ∼ 1.9 Ga old juvenile ...
Stefan Claesson, Hannu Huhma, Peter D. Kinny, Ian S. Williams   +3 more
openaire   +1 more source

Chapter 9 Svecofennian mafic-ultramafic intrusions

2005
Publisher Summary Mafic-ultramafic plutonic rocks emplaced during Precambrian orogenic episodes are a poorly defined category of intrusions. This is not only because of the long tectonometamorphic history of such terrains and scarcity of young analogies (deeply eroded oceanic or continental arcs), but also because orogenic emplacement of magmas is ...
openaire   +1 more source

Evolution of a Svecofennian-mantled gneiss dome in SW Finland, with evidence for thrusting

Precambrian Research, 1983
Abstract The structure and petrology of a dome, in Svecofennian migmatitic gneisses, schists, amphibolites and granitoids on Kemlo Island, is described. The structure resembles classical-mantled gneiss domes in that it comprises a core and mantle, but differs in that intrusive granitoids occur in the mantle rather than the core.
C.R. van Staal, P.F. Williams
openaire   +1 more source

Early Proterozoic Svecofennian volcanism and associated plutonism in Enklinge, SW Finland

Precambrian Research, 1990
Abstract The c. 1.9 Ga old Enklinge volcano-plutonic centre is part of the Svecofennian province of SW Finland. The rocks of the area consist of an early subaquatic extrusion of mafic/intermediate to rhyolitic volcanics underlain by marbles, graywackes and quartz-feldspar-rich volcanoclastic sediments.
Carl Ehlers, Alf Lindroos
openaire   +1 more source

Physicochemical model for the genesis of Svecofennian plagiomigmatites of the Belomorian Complex, northern Karelia

Geochemistry International, 2006
A mechanism is proposed to explain the genesis of biotite-quartz-feldspar plagiomigmatite leucosomes as a consequence of the reaction of an amphibolite protolith with ascending fluid. The model is based on the analysis of the mineralogical and geochemical zoning of plagiomigmatite bodies and their outer contact aureoles.
openaire   +1 more source

Svecofennian paradiagenetic concretions

Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1980
Per-Olov Ehlin, Hans J. Koark
openaire   +1 more source