Results 121 to 130 of about 183 (136)
Some of the next articles are maybe not open access.
Polydiapirism of granitic rocks in the Svecofennian of Central Sweden
Precambrian Research, 1975Abstract 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.
openaire +1 more source
The Bothnian coupled oroclines of the Svecofennian Orogen: a Palaeoproterozoic terrane wreck
Terra Nova, 2014AbstractThe 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 +2 more
openaire +1 more source
The growth of Early Proterozoic crust: new evidence from Svecofennian detrital zircons
Terra Nova, 1991AbstractIon microprobe U‐Pb analyses of zircons from the 1.9 Gyr old Svecofennian metasediments demonstrate the presence of both Archaean and early Proterozoic grains, whereas all conventional multi‐grain analyses give apparent U‐Pb ages of about 2.3 Gyr.
H. Huhma +3 more
openaire +1 more source
Svecofennian detrital zircon ages—implications for the Precambrian evolution of the Baltic Shield
Precambrian Research, 1993Metasediments 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 UPb ages between 2.4 and 2.1 Ga have previously been interpreted either as mixing ages between ∼ 1.9 Ga old juvenile ...
Stefan Claesson +3 more
openaire +1 more source
The depositional evolution of the Svecofennian supracrustal sequence in Finland and Sweden
Precambrian Research, 1987Abstract 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
Lithos, 2000
Abstract Five bimodal post-collisional intrusions in southwestern Finland have been investigated. Geochemically, the mafic rocks are shoshonitic monzodiorites, which are highly enriched in Fe, P, Ti, F, LREE and in incompatible trace elements. The felsic rocks are garnet bearing peraluminous, S-type anatectic granites.
Markku Vaisanen +3 more
openaire +1 more source
Abstract Five bimodal post-collisional intrusions in southwestern Finland have been investigated. Geochemically, the mafic rocks are shoshonitic monzodiorites, which are highly enriched in Fe, P, Ti, F, LREE and in incompatible trace elements. The felsic rocks are garnet bearing peraluminous, S-type anatectic granites.
Markku Vaisanen +3 more
openaire +1 more source
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
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
Swedish Svecofennian ore deposits
Mineralium Deposita, 1994K. Sundblad, J.M. Parr
openaire +1 more source
Chemical composition of Late Svecofennian granite in the Bothnian Basin, central Sweden
GFF, 2014Late 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
openaire +1 more source
Svecofennian paradiagenetic concretions
Neues Jahrbuch für Geologie und Paläontologie - Monatshefte, 1980Per-Olov Ehlin, Hans J. Koark
openaire +1 more source