Advanced

The Kullaberg peninsula – a glimpse of the Proterozoic evolution of SW Fennoscandia

Söderlund, Ulf LU ; Karlsson, Christine LU ; Johansson, Leif LU and Larsson, Kent LU (2008) In GFF 130(Part 1). p.1-10
Abstract
The Kullaberg peninsula in NW Skåne renders km-long, continuous exposures of the Proterozoic crystalline basement. We report ion microprobe (SIMS) U–Pb zircon ages for six key lithologies at Kullaberg that constrain the geological history of SW Fennoscandia for a considerable time period. Igneous zircon in three varieties of gneiss granite yield ages of 1694±7 Ma, 1693±7 Ma and 1663±14 Ma, in the same age range as orthogneisses further north in the same crustal segment. Partial melting, manifested by formation of pegmatite dykes and veins, occurred at 1473±6 Ma. Emplacement of mafic dykes, today seen as a large number of north-trending amphibolite sheets across the Kullaberg peninsula, is dated at 961±6 Ma. The dykes, which fall in the... (More)
The Kullaberg peninsula in NW Skåne renders km-long, continuous exposures of the Proterozoic crystalline basement. We report ion microprobe (SIMS) U–Pb zircon ages for six key lithologies at Kullaberg that constrain the geological history of SW Fennoscandia for a considerable time period. Igneous zircon in three varieties of gneiss granite yield ages of 1694±7 Ma, 1693±7 Ma and 1663±14 Ma, in the same age range as orthogneisses further north in the same crustal segment. Partial melting, manifested by formation of pegmatite dykes and veins, occurred at 1473±6 Ma. Emplacement of mafic dykes, today seen as a large number of north-trending amphibolite sheets across the Kullaberg peninsula, is dated at 961±6 Ma. The dykes, which fall in the same age range as the Blekinge-Dalarna dolerites (978–945 Ma) predate an event of amphibolite facies deformation, which presumably relates to exhumation of the crust following shortly after the Sveconorwegian compressional stage. A pegmatite was emplaced at 934±6 Ma after the crust had been exhumed through the ductile-brittle boundary. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
horst-graben, zircon, U–Pb SIMS, Skåne, Sorgenfrei-Tornquist zone
in
GFF
volume
130
issue
Part 1
pages
1 - 10
publisher
Geological Society of Sweden
external identifiers
  • wos:000256225300001
  • scopus:44149108217
ISSN
2000-0863
language
English
LU publication?
yes
id
746acf45-172e-4817-8f52-5a7cb12900c3 (old id 1152074)
date added to LUP
2008-09-15 14:22:07
date last changed
2017-01-01 05:15:52
@article{746acf45-172e-4817-8f52-5a7cb12900c3,
  abstract     = {The Kullaberg peninsula in NW Skåne renders km-long, continuous exposures of the Proterozoic crystalline basement. We report ion microprobe (SIMS) U–Pb zircon ages for six key lithologies at Kullaberg that constrain the geological history of SW Fennoscandia for a considerable time period. Igneous zircon in three varieties of gneiss granite yield ages of 1694±7 Ma, 1693±7 Ma and 1663±14 Ma, in the same age range as orthogneisses further north in the same crustal segment. Partial melting, manifested by formation of pegmatite dykes and veins, occurred at 1473±6 Ma. Emplacement of mafic dykes, today seen as a large number of north-trending amphibolite sheets across the Kullaberg peninsula, is dated at 961±6 Ma. The dykes, which fall in the same age range as the Blekinge-Dalarna dolerites (978–945 Ma) predate an event of amphibolite facies deformation, which presumably relates to exhumation of the crust following shortly after the Sveconorwegian compressional stage. A pegmatite was emplaced at 934±6 Ma after the crust had been exhumed through the ductile-brittle boundary.},
  author       = {Söderlund, Ulf and Karlsson, Christine and Johansson, Leif and Larsson, Kent},
  issn         = {2000-0863},
  keyword      = {horst-graben,zircon,U–Pb SIMS,Skåne,Sorgenfrei-Tornquist zone},
  language     = {eng},
  number       = {Part 1},
  pages        = {1--10},
  publisher    = {Geological Society of Sweden},
  series       = {GFF},
  title        = {The Kullaberg peninsula – a glimpse of the Proterozoic evolution of SW Fennoscandia},
  volume       = {130},
  year         = {2008},
}