High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation

Late Devonian time was a period of rapid upheaval in the Earth system, including climate change, sea level changes, widespread ocean anoxia, and the Frasnian-Famennian mass extinction; the cause(s) of these changes remain(s) uncertain. The Lennard Shelf of the Canning Basin in Western Australia cont...

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Autores principales:	Theodore Green, Sarah P. Slotznick, Plinio Jaqueto, Timothy D. Raub, Eric Tohver, Ted E. Playton, Peter W. Haines, Joseph L. Kirschvink, Roger M. Hocking, Paul Montgomery
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Devonian Canning Basin Frasnian-Famennian mass extinction magnetostratigraphy rock magnetism Earth’s magnetic field Science Q
Acceso en línea:	https://doaj.org/article/64a707a7ade344c18a4afe9fc8c0c683
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spelling	oai:doaj.org-article:64a707a7ade344c18a4afe9fc8c0c6832021-11-30T18:27:56ZHigh-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation2296-646310.3389/feart.2021.757749https://doaj.org/article/64a707a7ade344c18a4afe9fc8c0c6832021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/feart.2021.757749/fullhttps://doaj.org/toc/2296-6463Late Devonian time was a period of rapid upheaval in the Earth system, including climate change, sea level changes, widespread ocean anoxia, and the Frasnian-Famennian mass extinction; the cause(s) of these changes remain(s) uncertain. The Lennard Shelf of the Canning Basin in Western Australia contains carbonate reef sections spanning much of the Late Devonian Epoch and has been sampled for paleomagnetic analysis with studies by Hansma and colleagues in 2015 and Playton and colleagues in 2016. However, previous paleomagnetic directions were scattered and their use for magnetostratigraphy has been questioned. Here, rock magnetic data and magnetostratigraphy for a late Devonian drill-core from the Lennard Shelf were analyzed. Three magnetostratigraphic interpretations were made using different paleopoles that showed good correlation with each other and the earlier interpretations by Playton and colleagues in 2016. Additionally, the rock magnetic data revealed the samples contain various mixtures of detrital and diagenetic minerals, the former of which should be viable recorders of primary magnetic signatures. Even in samples with these detrital phases, paleomagnetic data were often noisy and produced ambiguous polarity assignments, likely due to the anomalously weak Devonian field. Because of this ambiguity and the absence of a robust paleopole, broader correlations for this critical time-period will be difficult without additional paleomagnetic data from the late Devonian Period. Expanded data for this interval could eventually shed light on the timing, causes, and rates of the Frasnian-Famennian mass extinction and other environmental shifts in the late Devonian Epoch.Theodore GreenSarah P. SlotznickPlinio JaquetoTimothy D. RaubEric TohverTed E. PlaytonPeter W. HainesJoseph L. KirschvinkJoseph L. KirschvinkRoger M. HockingPaul MontgomeryFrontiers Media S.A.articleDevonianCanning BasinFrasnian-Famennian mass extinctionmagnetostratigraphyrock magnetismEarth’s magnetic fieldScienceQENFrontiers in Earth Science, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Devonian Canning Basin Frasnian-Famennian mass extinction magnetostratigraphy rock magnetism Earth’s magnetic field Science Q
spellingShingle	Devonian Canning Basin Frasnian-Famennian mass extinction magnetostratigraphy rock magnetism Earth’s magnetic field Science Q Theodore Green Sarah P. Slotznick Plinio Jaqueto Timothy D. Raub Eric Tohver Ted E. Playton Peter W. Haines Joseph L. Kirschvink Joseph L. Kirschvink Roger M. Hocking Paul Montgomery High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
description	Late Devonian time was a period of rapid upheaval in the Earth system, including climate change, sea level changes, widespread ocean anoxia, and the Frasnian-Famennian mass extinction; the cause(s) of these changes remain(s) uncertain. The Lennard Shelf of the Canning Basin in Western Australia contains carbonate reef sections spanning much of the Late Devonian Epoch and has been sampled for paleomagnetic analysis with studies by Hansma and colleagues in 2015 and Playton and colleagues in 2016. However, previous paleomagnetic directions were scattered and their use for magnetostratigraphy has been questioned. Here, rock magnetic data and magnetostratigraphy for a late Devonian drill-core from the Lennard Shelf were analyzed. Three magnetostratigraphic interpretations were made using different paleopoles that showed good correlation with each other and the earlier interpretations by Playton and colleagues in 2016. Additionally, the rock magnetic data revealed the samples contain various mixtures of detrital and diagenetic minerals, the former of which should be viable recorders of primary magnetic signatures. Even in samples with these detrital phases, paleomagnetic data were often noisy and produced ambiguous polarity assignments, likely due to the anomalously weak Devonian field. Because of this ambiguity and the absence of a robust paleopole, broader correlations for this critical time-period will be difficult without additional paleomagnetic data from the late Devonian Period. Expanded data for this interval could eventually shed light on the timing, causes, and rates of the Frasnian-Famennian mass extinction and other environmental shifts in the late Devonian Epoch.
format	article
author	Theodore Green Sarah P. Slotznick Plinio Jaqueto Timothy D. Raub Eric Tohver Ted E. Playton Peter W. Haines Joseph L. Kirschvink Joseph L. Kirschvink Roger M. Hocking Paul Montgomery
author_facet	Theodore Green Sarah P. Slotznick Plinio Jaqueto Timothy D. Raub Eric Tohver Ted E. Playton Peter W. Haines Joseph L. Kirschvink Joseph L. Kirschvink Roger M. Hocking Paul Montgomery
author_sort	Theodore Green
title	High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
title_short	High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
title_full	High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
title_fullStr	High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
title_full_unstemmed	High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation
title_sort	high-resolution late devonian magnetostratigraphy from the canning basin, western australia: a re-evaluation
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/64a707a7ade344c18a4afe9fc8c0c683
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High-Resolution Late Devonian Magnetostratigraphy From the Canning Basin, Western Australia: A Re-Evaluation

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