New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica
The Ross orogenic belt in Antarctica is one of several Neoproterozoic-early Palaeozoic orogens that crisscrossed Gondwana and are associated with Gondwana’s assembly. We present new age data from the Queen Maud Mountains, Ross orogen, from areas that hitherto have lacked precise ages from the local...
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2020
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ftdatacite:10.6084/m9.figshare.12854135.v1 2023-05-15T13:53:07+02:00 New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica Paulsen, Timothy Encarnación, John Grunow, Anne M. Valencia, Victor A. Pecha, Mark E. Benowitz, Jeffrey Layer, Paul 2020 https://dx.doi.org/10.6084/m9.figshare.12854135.v1 https://tandf.figshare.com/articles/dataset/New_ages_from_the_Shackleton_Glacier_area_and_their_context_in_the_regional_tectonomagmatic_evolution_of_the_Ross_orogen_of_Antarctica/12854135/1 unknown Taylor & Francis https://dx.doi.org/10.1080/00206814.2020.1786737 https://dx.doi.org/10.6084/m9.figshare.12854135 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Medicine Genetics FOS Biological sciences Neuroscience Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology Developmental Biology 111714 Mental Health FOS Health sciences 110309 Infectious Diseases Computational Biology dataset Dataset 2020 ftdatacite https://doi.org/10.6084/m9.figshare.12854135.v1 https://doi.org/10.1080/00206814.2020.1786737 https://doi.org/10.6084/m9.figshare.12854135 2021-11-05T12:55:41Z The Ross orogenic belt in Antarctica is one of several Neoproterozoic-early Palaeozoic orogens that crisscrossed Gondwana and are associated with Gondwana’s assembly. We present new age data from the Queen Maud Mountains, Ross orogen, from areas that hitherto have lacked precise ages from the local plutonic rocks. The zircon U-Pb igneous crystallization ages (n = 7) and a hornblende 40 Ar/ 39 Ar cooling age (n = 1) constrain plutonism to primarily lie within the Cambrian to Ordovician. Cumulative zircon U-Pb crystallization age data yield polymodal age distributions (516 Ma, 506–502 Ma, and 488 Ma age peaks) that are similar to other areas of the Queen Maud-Horlick Mountains, consistent with regional magmatic flare-ups along the Pacific-Gondwana margin during these times. The ages of deformed plutons constrain deformation to the Cambrian (Series 2) to Ordovician (Lower), with some regions indicating a transition to post-tectonic magmatism and cooling at ~509-470 Ma. Collectively, the data indicate that the Queen Maud-Horlick Mountains share a similar petrotectonic history with other regions of the Pacific-Gondwana margin, providing new evidence that this tectonostratigraphic province is part of and not exotic to the larger igneous-sedimentary successions developed in the peri-Gondwana realm under a broadly convergent margin setting. Dataset Antarc* Antarctica Shackleton Glacier DataCite Metadata Store (German National Library of Science and Technology) Shackleton Pacific Shackleton Glacier ENVELOPE(-37.200,-37.200,-54.133,-54.133) Horlick Mountains ENVELOPE(-120.000,-120.000,-85.000,-85.000) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Medicine Genetics FOS Biological sciences Neuroscience Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology Developmental Biology 111714 Mental Health FOS Health sciences 110309 Infectious Diseases Computational Biology |
spellingShingle |
Medicine Genetics FOS Biological sciences Neuroscience Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology Developmental Biology 111714 Mental Health FOS Health sciences 110309 Infectious Diseases Computational Biology Paulsen, Timothy Encarnación, John Grunow, Anne M. Valencia, Victor A. Pecha, Mark E. Benowitz, Jeffrey Layer, Paul New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
topic_facet |
Medicine Genetics FOS Biological sciences Neuroscience Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology Developmental Biology 111714 Mental Health FOS Health sciences 110309 Infectious Diseases Computational Biology |
description |
The Ross orogenic belt in Antarctica is one of several Neoproterozoic-early Palaeozoic orogens that crisscrossed Gondwana and are associated with Gondwana’s assembly. We present new age data from the Queen Maud Mountains, Ross orogen, from areas that hitherto have lacked precise ages from the local plutonic rocks. The zircon U-Pb igneous crystallization ages (n = 7) and a hornblende 40 Ar/ 39 Ar cooling age (n = 1) constrain plutonism to primarily lie within the Cambrian to Ordovician. Cumulative zircon U-Pb crystallization age data yield polymodal age distributions (516 Ma, 506–502 Ma, and 488 Ma age peaks) that are similar to other areas of the Queen Maud-Horlick Mountains, consistent with regional magmatic flare-ups along the Pacific-Gondwana margin during these times. The ages of deformed plutons constrain deformation to the Cambrian (Series 2) to Ordovician (Lower), with some regions indicating a transition to post-tectonic magmatism and cooling at ~509-470 Ma. Collectively, the data indicate that the Queen Maud-Horlick Mountains share a similar petrotectonic history with other regions of the Pacific-Gondwana margin, providing new evidence that this tectonostratigraphic province is part of and not exotic to the larger igneous-sedimentary successions developed in the peri-Gondwana realm under a broadly convergent margin setting. |
format |
Dataset |
author |
Paulsen, Timothy Encarnación, John Grunow, Anne M. Valencia, Victor A. Pecha, Mark E. Benowitz, Jeffrey Layer, Paul |
author_facet |
Paulsen, Timothy Encarnación, John Grunow, Anne M. Valencia, Victor A. Pecha, Mark E. Benowitz, Jeffrey Layer, Paul |
author_sort |
Paulsen, Timothy |
title |
New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
title_short |
New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
title_full |
New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
title_fullStr |
New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
title_full_unstemmed |
New ages from the Shackleton Glacier area and their context in the regional tectonomagmatic evolution of the Ross orogen of Antarctica |
title_sort |
new ages from the shackleton glacier area and their context in the regional tectonomagmatic evolution of the ross orogen of antarctica |
publisher |
Taylor & Francis |
publishDate |
2020 |
url |
https://dx.doi.org/10.6084/m9.figshare.12854135.v1 https://tandf.figshare.com/articles/dataset/New_ages_from_the_Shackleton_Glacier_area_and_their_context_in_the_regional_tectonomagmatic_evolution_of_the_Ross_orogen_of_Antarctica/12854135/1 |
long_lat |
ENVELOPE(-37.200,-37.200,-54.133,-54.133) ENVELOPE(-120.000,-120.000,-85.000,-85.000) |
geographic |
Shackleton Pacific Shackleton Glacier Horlick Mountains |
geographic_facet |
Shackleton Pacific Shackleton Glacier Horlick Mountains |
genre |
Antarc* Antarctica Shackleton Glacier |
genre_facet |
Antarc* Antarctica Shackleton Glacier |
op_relation |
https://dx.doi.org/10.1080/00206814.2020.1786737 https://dx.doi.org/10.6084/m9.figshare.12854135 |
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.12854135.v1 https://doi.org/10.1080/00206814.2020.1786737 https://doi.org/10.6084/m9.figshare.12854135 |
_version_ |
1766258077061873664 |