Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska
Mid-Palaeozoic assembly models for the Arctic Alaska–Chukotka microplate predict the presence of cryptic crustal sutures, the exact locations and deformational histories of which have not been identified in the field. This study presents data on the provenance of polydeformed and metamorphosed strat...
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ftdatacite:10.6084/m9.figshare.c.3805696.v1 2023-05-15T14:53:34+02:00 Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska Hoiland, Carl W. Miller, Elizabeth L. Pease, Victoria Hourigan, Jeremy K. 2017 https://dx.doi.org/10.6084/m9.figshare.c.3805696.v1 https://figshare.com/collections/Detrital_zircon_U_Pb_geochronology_and_Hf_isotope_geochemistry_of_metasedimentary_strata_in_the_southern_Brooks_Range_constraints_on_Neoproterozoic_Cretaceous_evolution_of_Arctic_Alaska/3805696/1 unknown Figshare https://dx.doi.org/10.1144/sp460.16 https://dx.doi.org/10.6084/m9.figshare.c.3805696 CC BY https://creativecommons.org/licenses/by/4.0 CC-BY Geology FOS Earth and related environmental sciences Collection article 2017 ftdatacite https://doi.org/10.6084/m9.figshare.c.3805696.v1 https://doi.org/10.1144/sp460.16 https://doi.org/10.6084/m9.figshare.c.3805696 2021-11-05T12:55:41Z Mid-Palaeozoic assembly models for the Arctic Alaska–Chukotka microplate predict the presence of cryptic crustal sutures, the exact locations and deformational histories of which have not been identified in the field. This study presents data on the provenance of polydeformed and metamorphosed strata in the southern Brooks Range Schist Belt and Central Belt of presumed Proterozoic–Devonian depositional age, as well as for the structurally overlying strata, to help elucidate terrane boundaries within the Arctic Alaska–Chukotka microplate and to add new constraints to the palaeogeographical evolution of its constituent parts. The protoliths identified support correlations with metasedimentary strata in the Ruby terrane and Seward Peninsula and suggest a (peri-) Baltican origin in late Neoproterozoic–early Palaeozoic time. Proximity to Laurentia is only evident in what are inferred to be post-early Devonian age strata. By contrast, the North Slope and Apoon terranes originated proximal to Laurentia. The mid-Palaeozoic boundary between these (peri-) Baltican and (peri-) Laurentian terranes once lay between rocks of the Schist/Central belts and those of the Apoon terrane, but is obscured by severe Mesozoic–Cenozoic deformation. Whether this boundary represents a convergent or transform suture, when exactly it formed and how it relates to broader Caledonian convergence in the North Atlantic are still unresolved questions. Article in Journal/Newspaper Arctic Brooks Range Chukotka North Atlantic north slope Seward Peninsula Alaska DataCite Metadata Store (German National Library of Science and Technology) Arctic |
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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 Hoiland, Carl W. Miller, Elizabeth L. Pease, Victoria Hourigan, Jeremy K. Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Mid-Palaeozoic assembly models for the Arctic Alaska–Chukotka microplate predict the presence of cryptic crustal sutures, the exact locations and deformational histories of which have not been identified in the field. This study presents data on the provenance of polydeformed and metamorphosed strata in the southern Brooks Range Schist Belt and Central Belt of presumed Proterozoic–Devonian depositional age, as well as for the structurally overlying strata, to help elucidate terrane boundaries within the Arctic Alaska–Chukotka microplate and to add new constraints to the palaeogeographical evolution of its constituent parts. The protoliths identified support correlations with metasedimentary strata in the Ruby terrane and Seward Peninsula and suggest a (peri-) Baltican origin in late Neoproterozoic–early Palaeozoic time. Proximity to Laurentia is only evident in what are inferred to be post-early Devonian age strata. By contrast, the North Slope and Apoon terranes originated proximal to Laurentia. The mid-Palaeozoic boundary between these (peri-) Baltican and (peri-) Laurentian terranes once lay between rocks of the Schist/Central belts and those of the Apoon terrane, but is obscured by severe Mesozoic–Cenozoic deformation. Whether this boundary represents a convergent or transform suture, when exactly it formed and how it relates to broader Caledonian convergence in the North Atlantic are still unresolved questions. |
format |
Article in Journal/Newspaper |
author |
Hoiland, Carl W. Miller, Elizabeth L. Pease, Victoria Hourigan, Jeremy K. |
author_facet |
Hoiland, Carl W. Miller, Elizabeth L. Pease, Victoria Hourigan, Jeremy K. |
author_sort |
Hoiland, Carl W. |
title |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
title_short |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
title_full |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
title_fullStr |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
title_full_unstemmed |
Detrital zircon U–Pb geochronology and Hf isotope geochemistry of metasedimentary strata in the southern Brooks Range: constraints on Neoproterozoic–Cretaceous evolution of Arctic Alaska |
title_sort |
detrital zircon u–pb geochronology and hf isotope geochemistry of metasedimentary strata in the southern brooks range: constraints on neoproterozoic–cretaceous evolution of arctic alaska |
publisher |
Figshare |
publishDate |
2017 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.3805696.v1 https://figshare.com/collections/Detrital_zircon_U_Pb_geochronology_and_Hf_isotope_geochemistry_of_metasedimentary_strata_in_the_southern_Brooks_Range_constraints_on_Neoproterozoic_Cretaceous_evolution_of_Arctic_Alaska/3805696/1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Brooks Range Chukotka North Atlantic north slope Seward Peninsula Alaska |
genre_facet |
Arctic Brooks Range Chukotka North Atlantic north slope Seward Peninsula Alaska |
op_relation |
https://dx.doi.org/10.1144/sp460.16 https://dx.doi.org/10.6084/m9.figshare.c.3805696 |
op_rights |
CC BY https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.3805696.v1 https://doi.org/10.1144/sp460.16 https://doi.org/10.6084/m9.figshare.c.3805696 |
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