Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry
Detrital zircon U–Pb geochronology and Hf isotope geochemistry allow us to decipher the crustal provenance of Cambrian–Ordovician backarc basin strata of the Alexander terrane, North American Cordillera, and evaluate models for its origin and displacement history relative to Baltica, Gondwana, Siber...
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Geological Society of London
2016
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Online Access: | https://dx.doi.org/10.6084/m9.figshare.3453152.v1 https://geolsoc.figshare.com/articles/dataset/Baltican_crustal_provenance_for_Cambrian_Ordovician_sandstones_of_the_Alexander_terrane_North_American_Cordillera_evidence___from_detrital_zircon_U_Pb_geochronology_and_Hf_isotope_geochemistry/3453152/1 |
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ftdatacite:10.6084/m9.figshare.3453152.v1 2023-05-15T15:09:07+02:00 Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry Beranek, Luke P. Staal, Cees R. Van McClelland, William C. Israel, Steve Mihalynuk, Mitch G. 2016 https://dx.doi.org/10.6084/m9.figshare.3453152.v1 https://geolsoc.figshare.com/articles/dataset/Baltican_crustal_provenance_for_Cambrian_Ordovician_sandstones_of_the_Alexander_terrane_North_American_Cordillera_evidence___from_detrital_zircon_U_Pb_geochronology_and_Hf_isotope_geochemistry/3453152/1 unknown Geological Society of London https://dx.doi.org/10.1144/jgs2012-028 https://dx.doi.org/10.6084/m9.figshare.3453152 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453152.v1 https://doi.org/10.1144/jgs2012-028 https://doi.org/10.6084/m9.figshare.3453152 2021-11-05T12:55:41Z Detrital zircon U–Pb geochronology and Hf isotope geochemistry allow us to decipher the crustal provenance of Cambrian–Ordovician backarc basin strata of the Alexander terrane, North American Cordillera, and evaluate models for its origin and displacement history relative to Baltica, Gondwana, Siberia, and Laurentia. Quartzose shallow-marine sandstones of the Alexander terrane contain a range of Neoproterozoic to Neoarchaean detrital zircons with the most dominant age groupings c . 565–760, 1000–1250, 1450, and 1650 Ma. Subordinate volcaniclastic sandstones yield Cambrian and Ordovician detrital zircons with a prominent age peak at 477 Ma. The detrital zircon age signatures resemble coeval strata in the Eurasian high Arctic, and in combination with faunal and palaeomagnetic constraints suggest provenance from local magmatic rocks and the Timanide orogenic belt and Fennoscandian Shield of NE Baltica. The Hf isotopic compositions of Palaeozoic to Neoarchaean detrital zircons strongly favour Baltican crustal sources instead of similar-aged domains of Gondwana. The Alexander terrane formed part of an arc system that fringed the Uralian passive margin, and its position in the Uralian Seaway allowed faunal exchange between the Siberian and Baltican platforms. The available evidence suggests that the Alexander terrane originated in the Northern Hemisphere and migrated to the palaeo-Pacific Ocean by travelling around northern Laurentia. Dataset Arctic Fennoscandian Siberia DataCite Metadata Store (German National Library of Science and Technology) Arctic Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Beranek, Luke P. Staal, Cees R. Van McClelland, William C. Israel, Steve Mihalynuk, Mitch G. Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry allow us to decipher the crustal provenance of Cambrian–Ordovician backarc basin strata of the Alexander terrane, North American Cordillera, and evaluate models for its origin and displacement history relative to Baltica, Gondwana, Siberia, and Laurentia. Quartzose shallow-marine sandstones of the Alexander terrane contain a range of Neoproterozoic to Neoarchaean detrital zircons with the most dominant age groupings c . 565–760, 1000–1250, 1450, and 1650 Ma. Subordinate volcaniclastic sandstones yield Cambrian and Ordovician detrital zircons with a prominent age peak at 477 Ma. The detrital zircon age signatures resemble coeval strata in the Eurasian high Arctic, and in combination with faunal and palaeomagnetic constraints suggest provenance from local magmatic rocks and the Timanide orogenic belt and Fennoscandian Shield of NE Baltica. The Hf isotopic compositions of Palaeozoic to Neoarchaean detrital zircons strongly favour Baltican crustal sources instead of similar-aged domains of Gondwana. The Alexander terrane formed part of an arc system that fringed the Uralian passive margin, and its position in the Uralian Seaway allowed faunal exchange between the Siberian and Baltican platforms. The available evidence suggests that the Alexander terrane originated in the Northern Hemisphere and migrated to the palaeo-Pacific Ocean by travelling around northern Laurentia. |
format |
Dataset |
author |
Beranek, Luke P. Staal, Cees R. Van McClelland, William C. Israel, Steve Mihalynuk, Mitch G. |
author_facet |
Beranek, Luke P. Staal, Cees R. Van McClelland, William C. Israel, Steve Mihalynuk, Mitch G. |
author_sort |
Beranek, Luke P. |
title |
Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
title_short |
Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
title_full |
Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
title_fullStr |
Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
title_full_unstemmed |
Baltican crustal provenance for Cambrian–Ordovician sandstones of the Alexander terrane, North American Cordillera: evidence from detrital zircon U–Pb geochronology and Hf isotope geochemistry |
title_sort |
baltican crustal provenance for cambrian–ordovician sandstones of the alexander terrane, north american cordillera: evidence from detrital zircon u–pb geochronology and hf isotope geochemistry |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453152.v1 https://geolsoc.figshare.com/articles/dataset/Baltican_crustal_provenance_for_Cambrian_Ordovician_sandstones_of_the_Alexander_terrane_North_American_Cordillera_evidence___from_detrital_zircon_U_Pb_geochronology_and_Hf_isotope_geochemistry/3453152/1 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Fennoscandian Siberia |
genre_facet |
Arctic Fennoscandian Siberia |
op_relation |
https://dx.doi.org/10.1144/jgs2012-028 https://dx.doi.org/10.6084/m9.figshare.3453152 |
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.3453152.v1 https://doi.org/10.1144/jgs2012-028 https://doi.org/10.6084/m9.figshare.3453152 |
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