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
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 th...
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Taylor & Francis
2019
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Online Access: | https://eprints.keele.ac.uk/id/eprint/5841/ https://eprints.keele.ac.uk/id/eprint/5841/1/Meinhold_etal_GFF_accepted.pdf https://doi.org/10.1080/11035897.2019.1583685 |
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ftkeeleuniv:oai:eprints.keele.ac.uk:5841 2023-07-30T04:00:00+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, G Wemmer, K Högström, AES Ebbestad, JOR Jensen, S Palacios, T Høyberget, M Agić, H Taylor, WL 2019-10-03 text https://eprints.keele.ac.uk/id/eprint/5841/ https://eprints.keele.ac.uk/id/eprint/5841/1/Meinhold_etal_GFF_accepted.pdf https://doi.org/10.1080/11035897.2019.1583685 en eng Taylor & Francis https://eprints.keele.ac.uk/id/eprint/5841/1/Meinhold_etal_GFF_accepted.pdf Meinhold, G orcid:0000-0001-8375-8375 , Wemmer, K, Högström, AES, Ebbestad, JOR, Jensen, S, Palacios, T, Høyberget, M, Agić, H and Taylor, WL (2019) 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, 141 (4). pp. 289-294. doi:10.1080/11035897.2019.1583685 cc_by_nc_4 G Geography (General) Article PeerReviewed 2019 ftkeeleuniv https://doi.org/10.1080/11035897.2019.1583685 2023-07-10T21:17:08Z 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 µm 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 Δ° 2Θ and K‒Ar ages of 403.9 ± 4.2 Ma 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 localized 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 Keele University: Keele Research Repository 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 |
Keele University: Keele Research Repository |
op_collection_id |
ftkeeleuniv |
language |
English |
topic |
G Geography (General) |
spellingShingle |
G Geography (General) Meinhold, G Wemmer, K Högström, AES Ebbestad, JOR Jensen, S Palacios, T Høyberget, M Agić, 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 |
topic_facet |
G Geography (General) |
description |
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 µm 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 Δ° 2Θ and K‒Ar ages of 403.9 ± 4.2 Ma 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 localized 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, G Wemmer, K Högström, AES Ebbestad, JOR Jensen, S Palacios, T Høyberget, M Agić, H Taylor, WL |
author_facet |
Meinhold, G Wemmer, K Högström, AES Ebbestad, JOR Jensen, S Palacios, T Høyberget, M Agić, H Taylor, WL |
author_sort |
Meinhold, G |
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://eprints.keele.ac.uk/id/eprint/5841/ https://eprints.keele.ac.uk/id/eprint/5841/1/Meinhold_etal_GFF_accepted.pdf 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 |
https://eprints.keele.ac.uk/id/eprint/5841/1/Meinhold_etal_GFF_accepted.pdf Meinhold, G orcid:0000-0001-8375-8375 , Wemmer, K, Högström, AES, Ebbestad, JOR, Jensen, S, Palacios, T, Høyberget, M, Agić, H and Taylor, WL (2019) 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, 141 (4). pp. 289-294. doi:10.1080/11035897.2019.1583685 |
op_rights |
cc_by_nc_4 |
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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1772810661163696128 |