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The Mesoproterozoic in the Nordic countries

Bingen, Bernard; Andersson, Jenny LU ; Söderlund, Ulf LU and Möller, Charlotte LU (2008) In Episodes 31(1). p.29-34
Abstract
During the Mesoproterozoic, central Fennoscandia and Laurentia (Greenland) were characterized by a weakly extensional stress regime, as evident from episodic rapakivi granites, dolerite dykes, continental rift intrusives, sandstone basins and continental flood basalts. Along the southwestern active margin of Fennoscandia, the 1.64-1.52 Ga Gothian and 1.52-1.48 Ga Tele-markian accretionary events resulted in oceanwards continental growth. The 1.47-1.42 Ga Hallandian-Danopolonian event included high-grade metamorphism and granite magmatism in southern Fennoscandia. The pre-Sveconorwegian 1.34-1.14 Ga period is characterized by bimodal magmatism associated with sedimentation, possibly reflecting transcurrent tectonics. The Sveconorwegian... (More)
During the Mesoproterozoic, central Fennoscandia and Laurentia (Greenland) were characterized by a weakly extensional stress regime, as evident from episodic rapakivi granites, dolerite dykes, continental rift intrusives, sandstone basins and continental flood basalts. Along the southwestern active margin of Fennoscandia, the 1.64-1.52 Ga Gothian and 1.52-1.48 Ga Tele-markian accretionary events resulted in oceanwards continental growth. The 1.47-1.42 Ga Hallandian-Danopolonian event included high-grade metamorphism and granite magmatism in southern Fennoscandia. The pre-Sveconorwegian 1.34-1.14 Ga period is characterized by bimodal magmatism associated with sedimentation, possibly reflecting transcurrent tectonics. The Sveconorwegian otogeny involved polyphase imbrication of terranes between 1.14 and 0.97 Ga, as a result of a collision between Baltica and another major plate, followed by relaxation and post-collisional magmatism between 0.96 and 0.90 Ga. Recent geologic data support classical models restoring the Sveconorwegian belt directly to the east of the Grenville belt of Laurentia at 1.0 Ga. Fragments of Paleo- to Mesoproterozoic crust showing late Grenvillian-Sveconorwegian (1.00-0.92 Ga) magmatism and/or metamorphism are exposed in several tectonic levels in the Caledonides of Scandinavia, Svalbard and East Greenland, on both sides of the inferred lapetus suture. Linking these fragments into a coherent late-Grenvillian tectonic model, however, require additional study. (Less)
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type
Contribution to journal
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published
subject
keywords
PROVENANCE, CALEDONIDES, EVOLUTION, MAGMATISM, NAPPE COMPLEX, SW SCANDINAVIA, U-PB GEOCHRONOLOGY, SVECONORWEGIAN OROGEN, GREENLAND, SHIELD
in
Episodes
volume
31
issue
1
pages
29 - 34
publisher
International Union of Geological Sciences
external identifiers
  • wos:000255771300006
  • scopus:44649168230
ISSN
0705-3797
language
English
LU publication?
yes
id
daf26063-df67-43b6-bb07-fa1a467d02d1 (old id 1204218)
date added to LUP
2008-09-17 12:20:17
date last changed
2017-07-30 04:11:45
@article{daf26063-df67-43b6-bb07-fa1a467d02d1,
  abstract     = {During the Mesoproterozoic, central Fennoscandia and Laurentia (Greenland) were characterized by a weakly extensional stress regime, as evident from episodic rapakivi granites, dolerite dykes, continental rift intrusives, sandstone basins and continental flood basalts. Along the southwestern active margin of Fennoscandia, the 1.64-1.52 Ga Gothian and 1.52-1.48 Ga Tele-markian accretionary events resulted in oceanwards continental growth. The 1.47-1.42 Ga Hallandian-Danopolonian event included high-grade metamorphism and granite magmatism in southern Fennoscandia. The pre-Sveconorwegian 1.34-1.14 Ga period is characterized by bimodal magmatism associated with sedimentation, possibly reflecting transcurrent tectonics. The Sveconorwegian otogeny involved polyphase imbrication of terranes between 1.14 and 0.97 Ga, as a result of a collision between Baltica and another major plate, followed by relaxation and post-collisional magmatism between 0.96 and 0.90 Ga. Recent geologic data support classical models restoring the Sveconorwegian belt directly to the east of the Grenville belt of Laurentia at 1.0 Ga. Fragments of Paleo- to Mesoproterozoic crust showing late Grenvillian-Sveconorwegian (1.00-0.92 Ga) magmatism and/or metamorphism are exposed in several tectonic levels in the Caledonides of Scandinavia, Svalbard and East Greenland, on both sides of the inferred lapetus suture. Linking these fragments into a coherent late-Grenvillian tectonic model, however, require additional study.},
  author       = {Bingen, Bernard and Andersson, Jenny and Söderlund, Ulf and Möller, Charlotte},
  issn         = {0705-3797},
  keyword      = {PROVENANCE,CALEDONIDES,EVOLUTION,MAGMATISM,NAPPE COMPLEX,SW SCANDINAVIA,U-PB GEOCHRONOLOGY,SVECONORWEGIAN OROGEN,GREENLAND,SHIELD},
  language     = {eng},
  number       = {1},
  pages        = {29--34},
  publisher    = {International Union of Geological Sciences},
  series       = {Episodes},
  title        = {The Mesoproterozoic in the Nordic countries},
  volume       = {31},
  year         = {2008},
}