Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania
The Proterozoic Oonah Formation comprises a thick sequence of turbidites and mafic rocks that is widely exposed in western and northern Tasmania. The regional significance of the Oonah Formation is poorly understood as its contacts are faulted and estimates of its depositional age range from 1450 Ma...
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Taylor & Francis
2018
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ftdatacite:10.6084/m9.figshare.5896258.v2 2023-05-15T13:32:05+02:00 Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania J. A. Mulder R. F. Berry J. A. Halpin S. Meffre J. L. Everard 2018 https://dx.doi.org/10.6084/m9.figshare.5896258.v2 https://tandf.figshare.com/articles/Depositional_age_and_correlation_of_the_Oonah_Formation_refining_the_timing_of_Neoproterozoic_basin_formation_in_Tasmania/5896258/2 unknown Taylor & Francis https://dx.doi.org/10.1080/08120099.2018.1426629 https://dx.doi.org/10.6084/m9.figshare.5896258 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Developmental Biology Cancer Computational Biology dataset Dataset 2018 ftdatacite https://doi.org/10.6084/m9.figshare.5896258.v2 https://doi.org/10.1080/08120099.2018.1426629 https://doi.org/10.6084/m9.figshare.5896258 2021-11-05T12:55:41Z The Proterozoic Oonah Formation comprises a thick sequence of turbidites and mafic rocks that is widely exposed in western and northern Tasmania. The regional significance of the Oonah Formation is poorly understood as its contacts are faulted and estimates of its depositional age range from 1450 Ma to 700 Ma. Here we refine the depositional age of the Oonah Formation and clarify its relationship to other Proterozoic sequences in Tasmania. Magmatic apatite from the syn-sedimentary Cooee Dolerite has a 207 Pb-corrected 238 U/ 206 Pb age of 733 ± 9 Ma that provides a robust estimate of the depositional age of the Oonah Formation. The Oonah Formation contains abundant 750 Ma detrital monazite and has detrital zircon age populations at 1800–1700 Ma, 1590 Ma, and 1450 Ma. The new age and provenance data support the interpretation that the Oonah Formation is a lateral equivalent of the base of the Togari Group and correlatives in Tasmania. We demonstrate that the stratigraphy and provenance of Neoproterozoic strata in Tasmania differ from time-equivalent sequences in Adelaide Rift Complex but are similar to the Pahrump Group (Death Valley, California) and the Cobham Formation (Transantarctic Mountains), which supports a southwest Laurentia—Tasmania—East Antarctica connection within supercontinent Rodinia. Dataset Antarc* Antarctica East Antarctica DataCite Metadata Store (German National Library of Science and Technology) East Antarctica Transantarctic Mountains |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Developmental Biology Cancer Computational Biology |
spellingShingle |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Developmental Biology Cancer Computational Biology J. A. Mulder R. F. Berry J. A. Halpin S. Meffre J. L. Everard Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
topic_facet |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Developmental Biology Cancer Computational Biology |
description |
The Proterozoic Oonah Formation comprises a thick sequence of turbidites and mafic rocks that is widely exposed in western and northern Tasmania. The regional significance of the Oonah Formation is poorly understood as its contacts are faulted and estimates of its depositional age range from 1450 Ma to 700 Ma. Here we refine the depositional age of the Oonah Formation and clarify its relationship to other Proterozoic sequences in Tasmania. Magmatic apatite from the syn-sedimentary Cooee Dolerite has a 207 Pb-corrected 238 U/ 206 Pb age of 733 ± 9 Ma that provides a robust estimate of the depositional age of the Oonah Formation. The Oonah Formation contains abundant 750 Ma detrital monazite and has detrital zircon age populations at 1800–1700 Ma, 1590 Ma, and 1450 Ma. The new age and provenance data support the interpretation that the Oonah Formation is a lateral equivalent of the base of the Togari Group and correlatives in Tasmania. We demonstrate that the stratigraphy and provenance of Neoproterozoic strata in Tasmania differ from time-equivalent sequences in Adelaide Rift Complex but are similar to the Pahrump Group (Death Valley, California) and the Cobham Formation (Transantarctic Mountains), which supports a southwest Laurentia—Tasmania—East Antarctica connection within supercontinent Rodinia. |
format |
Dataset |
author |
J. A. Mulder R. F. Berry J. A. Halpin S. Meffre J. L. Everard |
author_facet |
J. A. Mulder R. F. Berry J. A. Halpin S. Meffre J. L. Everard |
author_sort |
J. A. Mulder |
title |
Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
title_short |
Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
title_full |
Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
title_fullStr |
Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
title_full_unstemmed |
Depositional age and correlation of the Oonah Formation: refining the timing of Neoproterozoic basin formation in Tasmania |
title_sort |
depositional age and correlation of the oonah formation: refining the timing of neoproterozoic basin formation in tasmania |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.5896258.v2 https://tandf.figshare.com/articles/Depositional_age_and_correlation_of_the_Oonah_Formation_refining_the_timing_of_Neoproterozoic_basin_formation_in_Tasmania/5896258/2 |
geographic |
East Antarctica Transantarctic Mountains |
geographic_facet |
East Antarctica Transantarctic Mountains |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_relation |
https://dx.doi.org/10.1080/08120099.2018.1426629 https://dx.doi.org/10.6084/m9.figshare.5896258 |
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.5896258.v2 https://doi.org/10.1080/08120099.2018.1426629 https://doi.org/10.6084/m9.figshare.5896258 |
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