Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges
Magnetic paleointensity stratigraphy is used to detect variations in the strength of Earth's ancient magnetic field. Paleointensity studies have demonstrated that a dominantly dipolar geomagnetic signal can be recorded in a globally coherent manner in different types of sediments and in non-sed...
Published in: | Quaternary Science Reviews |
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Online Access: | http://hdl.handle.net/1885/84570 https://doi.org/10.1016/j.quascirev.2012.10.036 https://openresearch-repository.anu.edu.au/bitstream/1885/84570/5/f5625xPUB12856_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/84570/7/01_Roberts_Magnetic_paleointensity_2013.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/84570 2024-01-14T10:07:39+01:00 Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges Roberts, Andrew Tauxe, Lisa Heslop, David http://hdl.handle.net/1885/84570 https://doi.org/10.1016/j.quascirev.2012.10.036 https://openresearch-repository.anu.edu.au/bitstream/1885/84570/5/f5625xPUB12856_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/84570/7/01_Roberts_Magnetic_paleointensity_2013.pdf.jpg unknown Pergamon-Elsevier Ltd 0277-3791 http://hdl.handle.net/1885/84570 doi:10.1016/j.quascirev.2012.10.036 https://openresearch-repository.anu.edu.au/bitstream/1885/84570/5/f5625xPUB12856_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/84570/7/01_Roberts_Magnetic_paleointensity_2013.pdf.jpg Quaternary Science Reviews Keywords: Geomagnetic fields Paleointensity Post-depositional remanent magnetizations Quaternary Remanent magnetization Geochronology Geomagnetism Remanence Sediments Stratigraphy Sedimentology geomagnetic field ice core magnetization p Depositional remanent magnetization Post-depositional remanent magnetization Journal article ftanucanberra https://doi.org/10.1016/j.quascirev.2012.10.036 2023-12-15T09:34:26Z Magnetic paleointensity stratigraphy is used to detect variations in the strength of Earth's ancient magnetic field. Paleointensity studies have demonstrated that a dominantly dipolar geomagnetic signal can be recorded in a globally coherent manner in different types of sediments and in non-sedimentary archives, including ice core records and marine magnetic anomaly profiles. The dominantly dipolar nature of geomagnetic paleointensity variations provides a global geophysical signal that has come to be widely used to date Quaternary sediments. Despite the many successful applications of paleointensity-assisted chronology, the mechanisms by which sediments become magnetized remain poorly understood and there is no satisfactory theoretical foundation for paleointensity estimation. In this paper, we outline past successes of sedimentary paleointensity analysis as well as remaining challenges that need to be addressed to place such work on a more secure theoretical and empirical foundation. We illustrate how common concepts for explaining sedimentary remanence acquisition can give rise to centennial to millennial offsets between paleomagnetic and other signals, which is a key limitation for using paleointensity signals for geochronology. Our approach is intended to help non-specialists to better understand the legitimate uses and limitations of paleointensity stratigraphy, while pointing to outstanding problems that require concerted specialist efforts to resolve. Article in Journal/Newspaper ice core Australian National University: ANU Digital Collections Quaternary Science Reviews 61 1 16 |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Geomagnetic fields Paleointensity Post-depositional remanent magnetizations Quaternary Remanent magnetization Geochronology Geomagnetism Remanence Sediments Stratigraphy Sedimentology geomagnetic field ice core magnetization p Depositional remanent magnetization Post-depositional remanent magnetization |
spellingShingle |
Keywords: Geomagnetic fields Paleointensity Post-depositional remanent magnetizations Quaternary Remanent magnetization Geochronology Geomagnetism Remanence Sediments Stratigraphy Sedimentology geomagnetic field ice core magnetization p Depositional remanent magnetization Post-depositional remanent magnetization Roberts, Andrew Tauxe, Lisa Heslop, David Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
topic_facet |
Keywords: Geomagnetic fields Paleointensity Post-depositional remanent magnetizations Quaternary Remanent magnetization Geochronology Geomagnetism Remanence Sediments Stratigraphy Sedimentology geomagnetic field ice core magnetization p Depositional remanent magnetization Post-depositional remanent magnetization |
description |
Magnetic paleointensity stratigraphy is used to detect variations in the strength of Earth's ancient magnetic field. Paleointensity studies have demonstrated that a dominantly dipolar geomagnetic signal can be recorded in a globally coherent manner in different types of sediments and in non-sedimentary archives, including ice core records and marine magnetic anomaly profiles. The dominantly dipolar nature of geomagnetic paleointensity variations provides a global geophysical signal that has come to be widely used to date Quaternary sediments. Despite the many successful applications of paleointensity-assisted chronology, the mechanisms by which sediments become magnetized remain poorly understood and there is no satisfactory theoretical foundation for paleointensity estimation. In this paper, we outline past successes of sedimentary paleointensity analysis as well as remaining challenges that need to be addressed to place such work on a more secure theoretical and empirical foundation. We illustrate how common concepts for explaining sedimentary remanence acquisition can give rise to centennial to millennial offsets between paleomagnetic and other signals, which is a key limitation for using paleointensity signals for geochronology. Our approach is intended to help non-specialists to better understand the legitimate uses and limitations of paleointensity stratigraphy, while pointing to outstanding problems that require concerted specialist efforts to resolve. |
format |
Article in Journal/Newspaper |
author |
Roberts, Andrew Tauxe, Lisa Heslop, David |
author_facet |
Roberts, Andrew Tauxe, Lisa Heslop, David |
author_sort |
Roberts, Andrew |
title |
Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
title_short |
Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
title_full |
Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
title_fullStr |
Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
title_full_unstemmed |
Magnetic paleointensity stratigraphy and high-resolution Quaternary geochronology: Successes and future challenges |
title_sort |
magnetic paleointensity stratigraphy and high-resolution quaternary geochronology: successes and future challenges |
publisher |
Pergamon-Elsevier Ltd |
url |
http://hdl.handle.net/1885/84570 https://doi.org/10.1016/j.quascirev.2012.10.036 https://openresearch-repository.anu.edu.au/bitstream/1885/84570/5/f5625xPUB12856_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/84570/7/01_Roberts_Magnetic_paleointensity_2013.pdf.jpg |
genre |
ice core |
genre_facet |
ice core |
op_source |
Quaternary Science Reviews |
op_relation |
0277-3791 http://hdl.handle.net/1885/84570 doi:10.1016/j.quascirev.2012.10.036 https://openresearch-repository.anu.edu.au/bitstream/1885/84570/5/f5625xPUB12856_2013.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/84570/7/01_Roberts_Magnetic_paleointensity_2013.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.quascirev.2012.10.036 |
container_title |
Quaternary Science Reviews |
container_volume |
61 |
container_start_page |
1 |
op_container_end_page |
16 |
_version_ |
1788062034842091520 |