A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula
This is an Accepted Manuscript of an article published by Taylor & Francis in GFF on 03 Oct 2019, available online: http://www.tandfonline.com/ https://doi.org/10.1080/11035897.2019.1583685 . Fine-fraction K‒Ar dating and illite crystallinity determination were applied on a peculiar pale olive g...
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ftunivtroemsoe:oai:munin.uit.no:10037/18034 2023-05-15T14:27:34+02:00 A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula Meinhold, Guido Wemmer, K Högström, Anette Ebbestad, Jan Ove R. Jensen, Sören Palacios, Teodoro Høyberget, Magne Agic, Heda Taylor, Wendy L. 2019-10-03 https://hdl.handle.net/10037/18034 https://doi.org/10.1080/11035897.2019.1583685 eng eng Taylor & Francis GFF info:eu-repo/grantAgreement/RCN/FRINATEK/231103/Norway/The Digermul Peninsula - a window into the early diversification of animal life// Meinhold G, Wemmer, Högström A, Ebbestad JOR, Jensen S, Palacios T, Høyberget M, Agic H, Taylor WL. A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula. GFF. 2019;141(4):289-294 FRIDAID 1677569 doi:10.1080/11035897.2019.1583685 1103-5897 2000-0863 https://hdl.handle.net/10037/18034 openAccess © 2019 Informa UK Limited, trading as Taylor & Francis Group VDP::Humanities: 000 VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed acceptedVersion 2019 ftunivtroemsoe https://doi.org/10.1080/11035897.2019.1583685 2021-06-25T17:57:11Z This is an Accepted Manuscript of an article published by Taylor & Francis in GFF on 03 Oct 2019, available online: http://www.tandfonline.com/ https://doi.org/10.1080/11035897.2019.1583685 . Fine-fraction K‒Ar dating and illite crystallinity determination were applied on a peculiar pale olive green shale sample from the upper Ediacaran Indreelva Member (Stáhpogieddi Formation, Vestertana Group, Gaissa Nappe Complex) of the Digermulen Peninsula in Finnmark, Arctic Norway, to constrain the age and metamorphic conditions of tectono-thermal overprint. The <2 and <0.2 µm grain-size fractions are almost purely illite and yielded an illite crystallinity (expressed as the Kübler index) of 0.215 Δ° 2θ and 0.228 ∆° 2θ and K‒Ar ages of 403.9 ± 4.2 and 391.5 ± 4.0 Ma, respectively. The K‒Ar ages are interpreted to present late-stage thermal overprint under low epizonal conditions along a localised shear zone, likely post-dating the peak of metamorphism and cleavage generation on the Digermulen Peninsula. Thus, a later tectono-metamorphic event related to the late stage of the Scandian orogeny is locally recorded in the Gaissa Nappe Complex of the Caledonides of Finnmark. This late Scandian event was probably caused by orogenic extensional collapse and appears to have extended at least into Mid-Devonian time. Article in Journal/Newspaper Arctic Arctic Finnmark Finnmark University of Tromsø: Munin Open Research Archive Arctic Digermulen ENVELOPE(11.560,11.560,64.731,64.731) Indreelva ENVELOPE(19.187,19.187,69.957,69.957) Norway Stáhpogieddi ENVELOPE(28.018,28.018,70.543,70.543) Vestertana ENVELOPE(27.868,27.868,70.424,70.424) GFF 141 4 289 294 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Humanities: 000 VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Humanities: 000 VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Meinhold, Guido Wemmer, K Högström, Anette Ebbestad, Jan Ove R. Jensen, Sören Palacios, Teodoro Høyberget, Magne Agic, Heda Taylor, Wendy L. A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
topic_facet |
VDP::Humanities: 000 VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
This is an Accepted Manuscript of an article published by Taylor & Francis in GFF on 03 Oct 2019, available online: http://www.tandfonline.com/ https://doi.org/10.1080/11035897.2019.1583685 . Fine-fraction K‒Ar dating and illite crystallinity determination were applied on a peculiar pale olive green shale sample from the upper Ediacaran Indreelva Member (Stáhpogieddi Formation, Vestertana Group, Gaissa Nappe Complex) of the Digermulen Peninsula in Finnmark, Arctic Norway, to constrain the age and metamorphic conditions of tectono-thermal overprint. The <2 and <0.2 µm grain-size fractions are almost purely illite and yielded an illite crystallinity (expressed as the Kübler index) of 0.215 Δ° 2θ and 0.228 ∆° 2θ and K‒Ar ages of 403.9 ± 4.2 and 391.5 ± 4.0 Ma, respectively. The K‒Ar ages are interpreted to present late-stage thermal overprint under low epizonal conditions along a localised shear zone, likely post-dating the peak of metamorphism and cleavage generation on the Digermulen Peninsula. Thus, a later tectono-metamorphic event related to the late stage of the Scandian orogeny is locally recorded in the Gaissa Nappe Complex of the Caledonides of Finnmark. This late Scandian event was probably caused by orogenic extensional collapse and appears to have extended at least into Mid-Devonian time. |
format |
Article in Journal/Newspaper |
author |
Meinhold, Guido Wemmer, K Högström, Anette Ebbestad, Jan Ove R. Jensen, Sören Palacios, Teodoro Høyberget, Magne Agic, Heda Taylor, Wendy L. |
author_facet |
Meinhold, Guido Wemmer, K Högström, Anette Ebbestad, Jan Ove R. Jensen, Sören Palacios, Teodoro Høyberget, Magne Agic, Heda Taylor, Wendy L. |
author_sort |
Meinhold, Guido |
title |
A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
title_short |
A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
title_full |
A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
title_fullStr |
A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
title_full_unstemmed |
A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula |
title_sort |
late caledonian tectono-thermal event in the gaissa nappe complex, arctic norway: evidence from fine-fraction k‒ar dating and illite crystallinity from the digermulen peninsula |
publisher |
Taylor & Francis |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/18034 https://doi.org/10.1080/11035897.2019.1583685 |
long_lat |
ENVELOPE(11.560,11.560,64.731,64.731) ENVELOPE(19.187,19.187,69.957,69.957) ENVELOPE(28.018,28.018,70.543,70.543) ENVELOPE(27.868,27.868,70.424,70.424) |
geographic |
Arctic Digermulen Indreelva Norway Stáhpogieddi Vestertana |
geographic_facet |
Arctic Digermulen Indreelva Norway Stáhpogieddi Vestertana |
genre |
Arctic Arctic Finnmark Finnmark |
genre_facet |
Arctic Arctic Finnmark Finnmark |
op_relation |
GFF info:eu-repo/grantAgreement/RCN/FRINATEK/231103/Norway/The Digermul Peninsula - a window into the early diversification of animal life// Meinhold G, Wemmer, Högström A, Ebbestad JOR, Jensen S, Palacios T, Høyberget M, Agic H, Taylor WL. A late Caledonian tectono-thermal event in the Gaissa Nappe Complex, Arctic Norway: evidence from fine-fraction K‒Ar dating and illite crystallinity from the Digermulen Peninsula. GFF. 2019;141(4):289-294 FRIDAID 1677569 doi:10.1080/11035897.2019.1583685 1103-5897 2000-0863 https://hdl.handle.net/10037/18034 |
op_rights |
openAccess © 2019 Informa UK Limited, trading as Taylor & Francis Group |
op_doi |
https://doi.org/10.1080/11035897.2019.1583685 |
container_title |
GFF |
container_volume |
141 |
container_issue |
4 |
container_start_page |
289 |
op_container_end_page |
294 |
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1766301366450388992 |