Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides
Mafic magmatic rocks formed between ca. 615 and 560 Ma along the Neoproterozoic margins of Baltica and Laurentia are classically attributed to continental rifting heralding the opening of the Iapetus Ocean. We report new data for the Kebnekaise Intrusive Complex (KIC) exposed in the Seve Nappes in n...
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ftdatacite:10.6084/m9.figshare.1568979.v1 2023-05-15T17:44:45+02:00 Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides Kirsch, Moritz Svenningsen, Olaf 2015 https://dx.doi.org/10.6084/m9.figshare.1568979.v1 https://figshare.com/articles/Root_zone_of_a_continental_rift_the_Neoproterozoic_Kebnekaise_Intrusive_Complex_northern_Swedish_Caledonides/1568979/1 unknown Taylor & Francis https://dx.doi.org/10.1080/11035897.2015.1055298 https://dx.doi.org/10.6084/m9.figshare.1568979 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Genetics FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Inorganic Chemistry Plant Biology dataset Dataset 2015 ftdatacite https://doi.org/10.6084/m9.figshare.1568979.v1 https://doi.org/10.1080/11035897.2015.1055298 https://doi.org/10.6084/m9.figshare.1568979 2021-11-05T12:55:41Z Mafic magmatic rocks formed between ca. 615 and 560 Ma along the Neoproterozoic margins of Baltica and Laurentia are classically attributed to continental rifting heralding the opening of the Iapetus Ocean. We report new data for the Kebnekaise Intrusive Complex (KIC) exposed in the Seve Nappes in northern Sweden. The KIC consists of sheeted dolerite dykes and gabbroic bodies with mutually intrusive relations. Major and trace element data exhibit a transitional- to normal-mid-ocean-ridge basalt-type geochemical signature. Differentiation processes and late-stage liquid immiscibility of a tholeiitic melt are considered to account for the compositional range exhibited by the KIC igneous rocks. U/Pb SIMS geochronological data from zircon rims yield an emplacement age of 578 ± 9 Ma. The KIC is thus younger and more depleted than coeval mafic rocks found in the Seve Nappe, and is interpreted to represent a high-level magma plumbing system in a late-stage continental rift. The composition and volume of rift-related igneous rocks in the Seve Nappes are inconsistent with a mantle plume origin, but are thought to record progressive lithospheric thinning and increasing involvement of an asthenospheric mantle component. Dataset Northern Sweden DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Genetics FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Inorganic Chemistry Plant Biology |
spellingShingle |
Genetics FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Inorganic Chemistry Plant Biology Kirsch, Moritz Svenningsen, Olaf Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
topic_facet |
Genetics FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Inorganic Chemistry Plant Biology |
description |
Mafic magmatic rocks formed between ca. 615 and 560 Ma along the Neoproterozoic margins of Baltica and Laurentia are classically attributed to continental rifting heralding the opening of the Iapetus Ocean. We report new data for the Kebnekaise Intrusive Complex (KIC) exposed in the Seve Nappes in northern Sweden. The KIC consists of sheeted dolerite dykes and gabbroic bodies with mutually intrusive relations. Major and trace element data exhibit a transitional- to normal-mid-ocean-ridge basalt-type geochemical signature. Differentiation processes and late-stage liquid immiscibility of a tholeiitic melt are considered to account for the compositional range exhibited by the KIC igneous rocks. U/Pb SIMS geochronological data from zircon rims yield an emplacement age of 578 ± 9 Ma. The KIC is thus younger and more depleted than coeval mafic rocks found in the Seve Nappe, and is interpreted to represent a high-level magma plumbing system in a late-stage continental rift. The composition and volume of rift-related igneous rocks in the Seve Nappes are inconsistent with a mantle plume origin, but are thought to record progressive lithospheric thinning and increasing involvement of an asthenospheric mantle component. |
format |
Dataset |
author |
Kirsch, Moritz Svenningsen, Olaf |
author_facet |
Kirsch, Moritz Svenningsen, Olaf |
author_sort |
Kirsch, Moritz |
title |
Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
title_short |
Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
title_full |
Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
title_fullStr |
Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
title_full_unstemmed |
Root zone of a continental rift: the Neoproterozoic Kebnekaise Intrusive Complex, northern Swedish Caledonides |
title_sort |
root zone of a continental rift: the neoproterozoic kebnekaise intrusive complex, northern swedish caledonides |
publisher |
Taylor & Francis |
publishDate |
2015 |
url |
https://dx.doi.org/10.6084/m9.figshare.1568979.v1 https://figshare.com/articles/Root_zone_of_a_continental_rift_the_Neoproterozoic_Kebnekaise_Intrusive_Complex_northern_Swedish_Caledonides/1568979/1 |
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Northern Sweden |
genre_facet |
Northern Sweden |
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https://dx.doi.org/10.1080/11035897.2015.1055298 https://dx.doi.org/10.6084/m9.figshare.1568979 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.1568979.v1 https://doi.org/10.1080/11035897.2015.1055298 https://doi.org/10.6084/m9.figshare.1568979 |
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