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Complexities and span of crystallization ages of a non-foliated Svecofennian granite pluton

Lindh, Anders LU ; Olsson, Johan ; Scherstén, Anders LU orcid ; Söderlund, Ulf LU ; Persson, Per Olof and Lindgren, Paula LU (2024) In GFF 146(1-2). p.48-63
Abstract

Upper-intercept U-Pb ages (TIMS) of two non-foliated I-type granites are 1887 ± 20 Ma (part of a granodiorite-granite sequence) and 1881 ± 2 Ma (leucogranite with transitions into pegmatite). A non-foliated S-granite, which according to field observations, is younger than the two I-granites, occurs within the same composite pluton. Zircons of this granite are heterogeneous and contain abundant cores. A 207Pb/206Pb–238U/206Pb concordia age of 1786 ± 23 Ma (Tera-Wasserburg diagram) using the LA-ICP method is consistent with the reported age of nearby LCT-pegmatites. The age range of non-foliated Svecofennian granite intrusions in this part of the Baltic Shield is thus of the order of 0.09... (More)

Upper-intercept U-Pb ages (TIMS) of two non-foliated I-type granites are 1887 ± 20 Ma (part of a granodiorite-granite sequence) and 1881 ± 2 Ma (leucogranite with transitions into pegmatite). A non-foliated S-granite, which according to field observations, is younger than the two I-granites, occurs within the same composite pluton. Zircons of this granite are heterogeneous and contain abundant cores. A 207Pb/206Pb–238U/206Pb concordia age of 1786 ± 23 Ma (Tera-Wasserburg diagram) using the LA-ICP method is consistent with the reported age of nearby LCT-pegmatites. The age range of non-foliated Svecofennian granite intrusions in this part of the Baltic Shield is thus of the order of 0.09 (Formula presented.) 103 Ma. A major part of this pluton is made up of several intrusions of S-type granite. Mapping, γ-radiation maps, and published chemical analyses give evidence of differences among these intrusions. No data exist on their age span.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
complex pluton, inhomogeneous zircon, LA-ICP dating, Non-foliated Svecofennian granite, timespan of granite intrusions, TIMS dating, zircon core
in
GFF
volume
146
issue
1-2
pages
16 pages
publisher
Taylor & Francis
external identifiers
  • scopus:105009834919
ISSN
1103-5897
DOI
10.1080/11035897.2025.2485904
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
id
ee968e40-96a4-4a5f-8864-03c7ef00cad7
date added to LUP
2025-11-18 15:49:09
date last changed
2025-11-20 10:15:25
@article{ee968e40-96a4-4a5f-8864-03c7ef00cad7,
  abstract     = {{<p>Upper-intercept U-Pb ages (TIMS) of two non-foliated I-type granites are 1887 ± 20 Ma (part of a granodiorite-granite sequence) and 1881 ± 2 Ma (leucogranite with transitions into pegmatite). A non-foliated S-granite, which according to field observations, is younger than the two I-granites, occurs within the same composite pluton. Zircons of this granite are heterogeneous and contain abundant cores. A <sup>207</sup>Pb/<sup>206</sup>Pb–<sup>238</sup>U/<sup>206</sup>Pb concordia age of 1786 ± 23 Ma (Tera-Wasserburg diagram) using the LA-ICP method is consistent with the reported age of nearby LCT-pegmatites. The age range of non-foliated Svecofennian granite intrusions in this part of the Baltic Shield is thus of the order of 0.09 (Formula presented.) 10<sup>3</sup> Ma. A major part of this pluton is made up of several intrusions of S-type granite. Mapping, γ-radiation maps, and published chemical analyses give evidence of differences among these intrusions. No data exist on their age span.</p>}},
  author       = {{Lindh, Anders and Olsson, Johan and Scherstén, Anders and Söderlund, Ulf and Persson, Per Olof and Lindgren, Paula}},
  issn         = {{1103-5897}},
  keywords     = {{complex pluton; inhomogeneous zircon; LA-ICP dating; Non-foliated Svecofennian granite; timespan of granite intrusions; TIMS dating; zircon core}},
  language     = {{eng}},
  number       = {{1-2}},
  pages        = {{48--63}},
  publisher    = {{Taylor & Francis}},
  series       = {{GFF}},
  title        = {{Complexities and span of crystallization ages of a non-foliated Svecofennian granite pluton}},
  url          = {{http://dx.doi.org/10.1080/11035897.2025.2485904}},
  doi          = {{10.1080/11035897.2025.2485904}},
  volume       = {{146}},
  year         = {{2024}},
}