Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway.
The Digermulen Peninsula in northeastern Finnmark, Arctic Norway, comprises one of the most complete Ediacaran–Cambrian transitions worldwide with a nearly continuous record of micro- and macrofossils from the interval of the diversification of complex life. Here, we report on the provenance and pos...
Published in: | Precambrian Research |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/27004 https://doi.org/10.1016/j.precamres.2022.106845 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/27004 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/27004 2023-05-15T14:26:06+02:00 Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. Meinhold, Guido Willbold, Matthias Karius, Volker Jensen, Sören Agić, Heda Ebbestad, Jan Ove R. Palacios, Teodoro Högström, Anette Høyberget, Magne Taylor, Wendy L. 2022-09-16 https://hdl.handle.net/10037/27004 https://doi.org/10.1016/j.precamres.2022.106845 eng eng Elsevier Precambrian Research Meinhold, Willbold, Karius, Jensen, Agić, Ebbestad, Palacios, Högström, Høyberget, Taylor. Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. Precambrian Research. 2022 FRIDAID 2052850 doi:10.1016/j.precamres.2022.106845 0301-9268 1872-7433 https://hdl.handle.net/10037/27004 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1016/j.precamres.2022.106845 2022-10-12T23:01:06Z The Digermulen Peninsula in northeastern Finnmark, Arctic Norway, comprises one of the most complete Ediacaran–Cambrian transitions worldwide with a nearly continuous record of micro- and macrofossils from the interval of the diversification of complex life. Here, we report on the provenance and post-depositional alteration of argillaceous mudstones from the Digermulen Peninsula using rare earth elements and Sm–Nd and Rb–Sr isotopic systematics to provide an environmental context and better understand this important transition in Earth’s history. The studied sections comprise a mid-Ediacaran glacial–interglacial cycle, including the Nyborg Formation (ca. 590 Ma) and Mortensnes Formation (related to the ca. 580 Ma-old Gaskiers glaciation), and the Stahpogieddi ´ Formation (ca. 560–537 Ma), which yields Ediacara-type fossils in the Indreelva Member and contains the Ediacaran–Cambrian boundary interval in the Manndrapselva Member and basal part of the informal Lower Breidvika member (ca. 537–530 Ma). Three sample groups, (1) Nyborg and Mortensnes formations, (2) the lowermost five samples from the Indreelva Member and (3) the remaining samples from the Indreelva as well as from the Manndrapselva and Lower Breidvika members, can be distinguished, belonging to distinct depositional units. All samples have negative εNd(T) values (− 6.00 to − 21.04) indicating a dominant input of terrigenous detritus with an old continental crust affinity. Significant shifts in Sm–Nd isotope values are related to changes in the sediment source, i.e. Svecofennian province vs Karelian province vs Svecofennian province plus in addition likely some juvenile (late Neoproterozoic volcanic) material, and probably reflect palaeotectonic reorganisation along the Iapetus-facing margin of Baltica. The combined Rb–Sr isotopic data of all samples yield an errorchron age of about 430 Ma reflecting the resetting of the Rb–Sr whole-rock isotope systems of the mudstones during the Scandian tectono-metamorphic event in the Gaissa Nappe Complex of ... Article in Journal/Newspaper Arctic Arctic Finnmark karelian Finnmark University of Tromsø: Munin Open Research Archive Arctic Norway Digermulen ENVELOPE(11.560,11.560,64.731,64.731) Mortensnes ENVELOPE(20.269,20.269,69.581,69.581) Indreelva ENVELOPE(19.187,19.187,69.957,69.957) Breidvika ENVELOPE(24.083,24.083,-70.250,-70.250) Precambrian Research 381 106845 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
The Digermulen Peninsula in northeastern Finnmark, Arctic Norway, comprises one of the most complete Ediacaran–Cambrian transitions worldwide with a nearly continuous record of micro- and macrofossils from the interval of the diversification of complex life. Here, we report on the provenance and post-depositional alteration of argillaceous mudstones from the Digermulen Peninsula using rare earth elements and Sm–Nd and Rb–Sr isotopic systematics to provide an environmental context and better understand this important transition in Earth’s history. The studied sections comprise a mid-Ediacaran glacial–interglacial cycle, including the Nyborg Formation (ca. 590 Ma) and Mortensnes Formation (related to the ca. 580 Ma-old Gaskiers glaciation), and the Stahpogieddi ´ Formation (ca. 560–537 Ma), which yields Ediacara-type fossils in the Indreelva Member and contains the Ediacaran–Cambrian boundary interval in the Manndrapselva Member and basal part of the informal Lower Breidvika member (ca. 537–530 Ma). Three sample groups, (1) Nyborg and Mortensnes formations, (2) the lowermost five samples from the Indreelva Member and (3) the remaining samples from the Indreelva as well as from the Manndrapselva and Lower Breidvika members, can be distinguished, belonging to distinct depositional units. All samples have negative εNd(T) values (− 6.00 to − 21.04) indicating a dominant input of terrigenous detritus with an old continental crust affinity. Significant shifts in Sm–Nd isotope values are related to changes in the sediment source, i.e. Svecofennian province vs Karelian province vs Svecofennian province plus in addition likely some juvenile (late Neoproterozoic volcanic) material, and probably reflect palaeotectonic reorganisation along the Iapetus-facing margin of Baltica. The combined Rb–Sr isotopic data of all samples yield an errorchron age of about 430 Ma reflecting the resetting of the Rb–Sr whole-rock isotope systems of the mudstones during the Scandian tectono-metamorphic event in the Gaissa Nappe Complex of ... |
format |
Article in Journal/Newspaper |
author |
Meinhold, Guido Willbold, Matthias Karius, Volker Jensen, Sören Agić, Heda Ebbestad, Jan Ove R. Palacios, Teodoro Högström, Anette Høyberget, Magne Taylor, Wendy L. |
spellingShingle |
Meinhold, Guido Willbold, Matthias Karius, Volker Jensen, Sören Agić, Heda Ebbestad, Jan Ove R. Palacios, Teodoro Högström, Anette Høyberget, Magne Taylor, Wendy L. Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
author_facet |
Meinhold, Guido Willbold, Matthias Karius, Volker Jensen, Sören Agić, Heda Ebbestad, Jan Ove R. Palacios, Teodoro Högström, Anette Høyberget, Magne Taylor, Wendy L. |
author_sort |
Meinhold, Guido |
title |
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
title_short |
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
title_full |
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
title_fullStr |
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
title_full_unstemmed |
Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. |
title_sort |
rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous ediacaran and lowermost cambrian strata from arctic norway. |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27004 https://doi.org/10.1016/j.precamres.2022.106845 |
long_lat |
ENVELOPE(11.560,11.560,64.731,64.731) ENVELOPE(20.269,20.269,69.581,69.581) ENVELOPE(19.187,19.187,69.957,69.957) ENVELOPE(24.083,24.083,-70.250,-70.250) |
geographic |
Arctic Norway Digermulen Mortensnes Indreelva Breidvika |
geographic_facet |
Arctic Norway Digermulen Mortensnes Indreelva Breidvika |
genre |
Arctic Arctic Finnmark karelian Finnmark |
genre_facet |
Arctic Arctic Finnmark karelian Finnmark |
op_relation |
Precambrian Research Meinhold, Willbold, Karius, Jensen, Agić, Ebbestad, Palacios, Högström, Høyberget, Taylor. Rare earth elements and neodymium and strontium isotopic constraints on provenance switch and post-depositional alteration of fossiliferous Ediacaran and lowermost Cambrian strata from Arctic Norway. Precambrian Research. 2022 FRIDAID 2052850 doi:10.1016/j.precamres.2022.106845 0301-9268 1872-7433 https://hdl.handle.net/10037/27004 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.precamres.2022.106845 |
container_title |
Precambrian Research |
container_volume |
381 |
container_start_page |
106845 |
_version_ |
1766298579927826432 |