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Mesoproterozoic continental growth: U-Pb-Hf-O zircon record in the Idefjorden Terrane, Sveconorwegian Orogen

Petersson, Andreas LU ; Scherstén, Anders LU ; Bingen, Bernard; Gerdes, Axel and Whitehouse, Martin J. (2015) In Precambrian Research 261. p.75-95
Abstract
The Idefjorden Terrane of the Sveconorwegian Orogen, Fennoscandia, is known to be an area of comparatively juvenile Mesoproterozoic continental growth. Here we provide an improved model of crustal growth based on new coupled zircon U-Pb-O-Lu-Hf isotopic data on thirteen samples of mafic to intermediate plutonic rocks from different domains of the Idefjorden Terrane. The new data support a retreating volcanic arc system, with shorter pulses of accretion. A gradual increase of radiogenic Hf (mean slif from 3.5 to 5.4) in plutonic rocks intruded between ca. 1630 Ma and 1560 Ma reflects an increase in juvenile mantle-derived magma in the genesis of the plutonic suites. This trend is consistent with development of an extensional back-arc rift... (More)
The Idefjorden Terrane of the Sveconorwegian Orogen, Fennoscandia, is known to be an area of comparatively juvenile Mesoproterozoic continental growth. Here we provide an improved model of crustal growth based on new coupled zircon U-Pb-O-Lu-Hf isotopic data on thirteen samples of mafic to intermediate plutonic rocks from different domains of the Idefjorden Terrane. The new data support a retreating volcanic arc system, with shorter pulses of accretion. A gradual increase of radiogenic Hf (mean slif from 3.5 to 5.4) in plutonic rocks intruded between ca. 1630 Ma and 1560 Ma reflects an increase in juvenile mantle-derived magma in the genesis of the plutonic suites. This trend is consistent with development of an extensional back-arc rift geotectonic setting, accommodating deposition of the Stora Le-Marstrand greywacke dominated metasediment sequence. Combined isotopic information and the detrital zircon record of the Stora Le-Marstrand Formation support the interpretation that the Idefjorden Terrane was separated from the Fennoscandian Shield before the Sveconorwegian Orogeny. (C) 2015 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Continental growth, Fennoscandia, Zircon, U-Pb, Lu-Hf, Oxygen isotope
in
Precambrian Research
volume
261
pages
75 - 95
publisher
Elsevier
external identifiers
  • wos:000352680500006
  • scopus:84923347554
ISSN
0301-9268
DOI
10.1016/j.precamres.2015.02.006
language
English
LU publication?
yes
id
97b87149-dc38-44a1-99d1-5996ad4d635d (old id 5402825)
date added to LUP
2015-05-19 13:56:26
date last changed
2017-07-02 03:10:04
@article{97b87149-dc38-44a1-99d1-5996ad4d635d,
  abstract     = {The Idefjorden Terrane of the Sveconorwegian Orogen, Fennoscandia, is known to be an area of comparatively juvenile Mesoproterozoic continental growth. Here we provide an improved model of crustal growth based on new coupled zircon U-Pb-O-Lu-Hf isotopic data on thirteen samples of mafic to intermediate plutonic rocks from different domains of the Idefjorden Terrane. The new data support a retreating volcanic arc system, with shorter pulses of accretion. A gradual increase of radiogenic Hf (mean slif from 3.5 to 5.4) in plutonic rocks intruded between ca. 1630 Ma and 1560 Ma reflects an increase in juvenile mantle-derived magma in the genesis of the plutonic suites. This trend is consistent with development of an extensional back-arc rift geotectonic setting, accommodating deposition of the Stora Le-Marstrand greywacke dominated metasediment sequence. Combined isotopic information and the detrital zircon record of the Stora Le-Marstrand Formation support the interpretation that the Idefjorden Terrane was separated from the Fennoscandian Shield before the Sveconorwegian Orogeny. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Petersson, Andreas and Scherstén, Anders and Bingen, Bernard and Gerdes, Axel and Whitehouse, Martin J.},
  issn         = {0301-9268},
  keyword      = {Continental growth,Fennoscandia,Zircon,U-Pb,Lu-Hf,Oxygen isotope},
  language     = {eng},
  pages        = {75--95},
  publisher    = {Elsevier},
  series       = {Precambrian Research},
  title        = {Mesoproterozoic continental growth: U-Pb-Hf-O zircon record in the Idefjorden Terrane, Sveconorwegian Orogen},
  url          = {http://dx.doi.org/10.1016/j.precamres.2015.02.006},
  volume       = {261},
  year         = {2015},
}