A chronological subdivision of the Transscandinavian Igneous Belt — three magmatic episodes?

Larson, Sven Åke; Berglund, John V.

doi:10.1080/11035899209453912

Cited by 109 publications

(48 citation statements)

References 9 publications

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“…Berglund 1992 andÅhäll &Larson 2000) and the intrusion of the undeformed Karlshamn-type granites (1.45 Ga; Kornfält & Vaasjoki 1999). Berthelsen (1988) suggests an event at 1.6 Ga to explain the metamorphic overprinting.…”

Section: Discussionmentioning

confidence: 98%

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Interpreting the Småland-Blekinge Deformation Zone from chemical and structural data

Lindh¹,

Krauss

Franz

2001

GFF

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Section: Discussionmentioning

confidence: 98%

“…Larson & Berglund (1992) distinguished three different generations within the TIB. These have ages of between 1.81 and 1.65 Ga.…”

Section: Regional Settingmentioning

confidence: 99%

Interpreting the Småland-Blekinge Deformation Zone from chemical and structural data

Lindh¹,

Krauss

Franz

2001

GFF

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“…1) intrusive and associated volcanic rocks of 1.81-1.76 Ga. Commonly those rocks show weak or no foliation (Larson and Berglund 1992;Hö gdahl et al 2004). Between 1.46 and 1.42 Ga, ''anorogenic'' granitoids, including the Karlshamn pluton, were intruded forming many massifs in southern Sweden (Å berg 1988;Johansson and Larsen 1989;Kornfä lt 1993bKornfä lt , 1996Kornfä lt and Vaasjoki 1999;Geisler and Schleicher 2000;Å hä ll 2001;Č ečys et al 2002).…”

Section: Geological Settingmentioning

confidence: 96%

Emplacement and deformation of the ca. 1.45 Ga Karlshamn granitoid pluton, southeastern Sweden, during ENE-WSW Danopolonian shortening

Cecys

Benn

2006

Int J Earth Sci (Geol Rundsch)

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Anisotropy of magnetic susceptibility and structural geology of the ca. 1.45 Ga Karlshamn pluton (southern Sweden) are used to study its emplacement and structural evolution. The Karlshamn pluton is one of the largest metaluminous A-type granitoid intrusions in southern Sweden. It is a multiphase body made up of two suites that differ in composition but which have similar crystallization ages. The magmatic foliation, ductile shear zones and granite-pegmatite filled fractures were mapped as well as the metamorphic foliation and extension lineation in the metamorphic host rocks. The anisotropy of magnetic susceptibility was used to map the magnetite petrofabric of the pluton, providing a larger data set for both the magmatic foliations and lineations, which could not be mapped in the field. The fabrics within the pluton are continuous with the metamorphic fabrics in the country rocks. Both the pluton and the country rock fabrics were folded during ENE-WSW compression, while the pluton was still a magma mush. The stress field orientation during cooling of the pluton is determined on the basis of magmatic, ductile and brittle structures in the Karlshamn pluton that formed successively as the pluton cooled. The compressional event is referred to as the Danopolonian orogeny and therefore the Karlshamn granitoids, and other plutons of similar composition and age in central and southern Sweden, on the Danish Island of Bornholm, and in Lithuania, may be considered as syntectonic intrusions and not as anorogenic, as was previously thought.

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“…Moreover, it was reported that the territory of Nordland exhibits features of neotectonic movements (Dehls & Olesen, 2000), which together with the seismicity have been related to stress generation from the ridge push of the Atlantic Ocean, the post-glacial rebound, and the sediment redistribution and topography (e.g., Olesen et al, 2013a). In addition, the geological settings in Nordland are very complex: the Caledonian nappes are folded down to 5 km deep (Midtun, 1988;Olesen et al, 2002), intrusive igneous bodies, such as the Transscandinavian Igneous Belt (e.g., Gaal & Gorbatschev, 1987;Henkel & Eriksson, 1987;Larson & Berglund, 1992;Hogdahl et al, 2004), are located onshore, while the Moho depth varies from less than 20 km offshore to the west to more than 45 km onshore to the east with a convex Moho bulge under the Lofoten-Vesterålen region (Olesen et al, 2002;Maystrenko et al, 2017). As earthquakes generally occur along pre-existing zones of weakness and result from a buildup of stress and/or reduced effective shear strength along favourably oriented faults (e.g., Davis & Reynolds, 1996), all the factors mentioned above could influence the stress field and may have an effect on the tectonic structures, which are abundant in the Nordland area.…”

Section: Introductionmentioning

confidence: 99%

Relation between seismicity and tectonic structures offshore and onshore Nordland, northern Norway

Janutyte¹,

Lindholm²,

Olesen³

2017

NJG

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A chronological subdivision of the Transscandinavian Igneous Belt — three magmatic episodes?

Cited by 109 publications

References 9 publications

Interpreting the Småland-Blekinge Deformation Zone from chemical and structural data

Interpreting the Småland-Blekinge Deformation Zone from chemical and structural data

Emplacement and deformation of the ca. 1.45 Ga Karlshamn granitoid pluton, southeastern Sweden, during ENE-WSW Danopolonian shortening

Relation between seismicity and tectonic structures offshore and onshore Nordland, northern Norway

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