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Ulf Söderlund

Ulf Söderlund

Professor

Ulf Söderlund

The Mesoproterozoic (1.47-1.44 Ga) orogenic magmatism in Fennoscandia; Baddeleyite U-Pb dating of a suite of massif-type anorthosites in S Sweden

Author

  • Linus Brander
  • Ulf Söderlund

Summary, in English

The Jonkoping Anorthositic Suite (JAS) in S. Sweden has characteristics typical for (Proterozoic) massif-type anorthosites. The interstitial liquid of these plagioclase-porphyritic rocks solidified at 1,455 +/- A 6 Ma, as determined by U-Pb isotope analysis of baddeleyite. The JAS developed during a regional 1.47-1.44 event in Fennoscandia that generated widespread mafic magmatism (basalts, and diabase dykes and sills) in the north and emplacement of felsic plutons in the south. The event of 1.47-1.44 Ga magmatism in Fennoscandia largely coincides in age with dynamic high-grade metamorphism in SW Sweden and was probably related to convergent active-margin processes during the Danopolonian orogeny.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2009

Language

English

Pages

499-516

Publication/Series

International Journal of Earth Sciences

Volume

98

Issue

3

Document type

Journal article

Publisher

Springer

Topic

  • Geology

Keywords

  • Fennoscandia
  • anorthosites
  • massif-type
  • baddeleyite
  • Danopolonian

Status

Published

ISBN/ISSN/Other

  • ISSN: 1437-3254