Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction
The Integrated Ocean Drilling Program Expedition 318 to the Wilkes Land margin of Antarctica recovered a sedimentary succession ranging in age from lower Eocene to the Holocene. Excellent stratigraphic control is key to understanding the timing of paleoceanographic events through critical climate in...
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2012
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Online Access: | https://espace.library.uq.edu.au/view/UQ:295957 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:295957 2023-05-15T13:59:08+02:00 Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction Tauxe, L. Stickley, C. E. Sugisaki, S. Bijl, P. K. Bohaty, S. M. Brinkhuis, H. Escutia, C. Flores, J. A. Houben, A. J. P. Iwai, M. Jimenez-Espejo, F. McKay, R. Passchier, S. Pross, J. Riesselman, C. R. Rohl, U. Sangiorgi, F. Welsh, K. Klaus, A. Fehr, A. Bendle, J. A. P. Dunbar, R. Gonzalez, J. Hayden, T. Katsuki, K. Olney, M. P. Pekar, S. F. Shrivastava, P. K. van de Flierdt, T. Williams, T. Yamane, M. 2012-01-01 https://espace.library.uq.edu.au/view/UQ:295957 eng eng Wiley-Blackwell doi:10.1029/2012PA002308 issn:0883-8305 issn:1944-9186 orcid:0000-0002-4834-4190 OCE1058858 Antarctica Eocene GTS Biostratigraphy Magnetostratigraphy Paleoclimate 1910 Oceanography 1911 Palaeontology Journal Article 2012 ftunivqespace https://doi.org/10.1029/2012PA002308 2020-11-10T00:00:59Z The Integrated Ocean Drilling Program Expedition 318 to the Wilkes Land margin of Antarctica recovered a sedimentary succession ranging in age from lower Eocene to the Holocene. Excellent stratigraphic control is key to understanding the timing of paleoceanographic events through critical climate intervals. Drill sites recovered the lower and middle Eocene, nearly the entire Oligocene, the Miocene from about 17Ma, the entire Pliocene and much of the Pleistocene. The paleomagnetic properties are generally suitable for magnetostratigraphic interpretation, with well-behaved demagnetization diagrams, uniform distribution of declinations, and a clear separation into two inclination modes. Although the sequences were discontinuously recovered with many gaps due to coring, and there are hiatuses from sedimentary and tectonic processes, the magnetostratigraphic patterns are in general readily interpretable. Our interpretations are integrated with the diatom, radiolarian, calcareous nannofossils and dinoflagellate cyst (dinocyst) biostratigraphy. The magnetostratigraphy significantly improves the resolution of the chronostratigraphy, particularly in intervals with poor biostratigraphic control. However, Southern Ocean records with reliable magnetostratigraphies are notably scarce, and the data reported here provide an opportunity for improved calibration of the biostratigraphic records. In particular, we provide a rare magnetostratigraphic calibration for dinocyst biostratigraphy in the Paleogene and a substantially improved diatom calibration for the Pliocene. This paper presents the stratigraphic framework for future paleoceanographic proxy records which are being developed for the Wilkes Land margin cores. It further provides tight constraints on the duration of regional hiatuses inferred from seismic surveys of the region. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Wilkes Land The University of Queensland: UQ eSpace Southern Ocean Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Paleoceanography 27 2 n/a n/a |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Antarctica Eocene GTS Biostratigraphy Magnetostratigraphy Paleoclimate 1910 Oceanography 1911 Palaeontology |
spellingShingle |
Antarctica Eocene GTS Biostratigraphy Magnetostratigraphy Paleoclimate 1910 Oceanography 1911 Palaeontology Tauxe, L. Stickley, C. E. Sugisaki, S. Bijl, P. K. Bohaty, S. M. Brinkhuis, H. Escutia, C. Flores, J. A. Houben, A. J. P. Iwai, M. Jimenez-Espejo, F. McKay, R. Passchier, S. Pross, J. Riesselman, C. R. Rohl, U. Sangiorgi, F. Welsh, K. Klaus, A. Fehr, A. Bendle, J. A. P. Dunbar, R. Gonzalez, J. Hayden, T. Katsuki, K. Olney, M. P. Pekar, S. F. Shrivastava, P. K. van de Flierdt, T. Williams, T. Yamane, M. Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
topic_facet |
Antarctica Eocene GTS Biostratigraphy Magnetostratigraphy Paleoclimate 1910 Oceanography 1911 Palaeontology |
description |
The Integrated Ocean Drilling Program Expedition 318 to the Wilkes Land margin of Antarctica recovered a sedimentary succession ranging in age from lower Eocene to the Holocene. Excellent stratigraphic control is key to understanding the timing of paleoceanographic events through critical climate intervals. Drill sites recovered the lower and middle Eocene, nearly the entire Oligocene, the Miocene from about 17Ma, the entire Pliocene and much of the Pleistocene. The paleomagnetic properties are generally suitable for magnetostratigraphic interpretation, with well-behaved demagnetization diagrams, uniform distribution of declinations, and a clear separation into two inclination modes. Although the sequences were discontinuously recovered with many gaps due to coring, and there are hiatuses from sedimentary and tectonic processes, the magnetostratigraphic patterns are in general readily interpretable. Our interpretations are integrated with the diatom, radiolarian, calcareous nannofossils and dinoflagellate cyst (dinocyst) biostratigraphy. The magnetostratigraphy significantly improves the resolution of the chronostratigraphy, particularly in intervals with poor biostratigraphic control. However, Southern Ocean records with reliable magnetostratigraphies are notably scarce, and the data reported here provide an opportunity for improved calibration of the biostratigraphic records. In particular, we provide a rare magnetostratigraphic calibration for dinocyst biostratigraphy in the Paleogene and a substantially improved diatom calibration for the Pliocene. This paper presents the stratigraphic framework for future paleoceanographic proxy records which are being developed for the Wilkes Land margin cores. It further provides tight constraints on the duration of regional hiatuses inferred from seismic surveys of the region. |
format |
Article in Journal/Newspaper |
author |
Tauxe, L. Stickley, C. E. Sugisaki, S. Bijl, P. K. Bohaty, S. M. Brinkhuis, H. Escutia, C. Flores, J. A. Houben, A. J. P. Iwai, M. Jimenez-Espejo, F. McKay, R. Passchier, S. Pross, J. Riesselman, C. R. Rohl, U. Sangiorgi, F. Welsh, K. Klaus, A. Fehr, A. Bendle, J. A. P. Dunbar, R. Gonzalez, J. Hayden, T. Katsuki, K. Olney, M. P. Pekar, S. F. Shrivastava, P. K. van de Flierdt, T. Williams, T. Yamane, M. |
author_facet |
Tauxe, L. Stickley, C. E. Sugisaki, S. Bijl, P. K. Bohaty, S. M. Brinkhuis, H. Escutia, C. Flores, J. A. Houben, A. J. P. Iwai, M. Jimenez-Espejo, F. McKay, R. Passchier, S. Pross, J. Riesselman, C. R. Rohl, U. Sangiorgi, F. Welsh, K. Klaus, A. Fehr, A. Bendle, J. A. P. Dunbar, R. Gonzalez, J. Hayden, T. Katsuki, K. Olney, M. P. Pekar, S. F. Shrivastava, P. K. van de Flierdt, T. Williams, T. Yamane, M. |
author_sort |
Tauxe, L. |
title |
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
title_short |
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
title_full |
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
title_fullStr |
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
title_full_unstemmed |
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction |
title_sort |
chronostratigraphic framework for the iodp expedition 318 cores from the wilkes lan margin: constraints for paleoceanographic reconstruction |
publisher |
Wiley-Blackwell |
publishDate |
2012 |
url |
https://espace.library.uq.edu.au/view/UQ:295957 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Southern Ocean Wilkes Land |
geographic_facet |
Southern Ocean Wilkes Land |
genre |
Antarc* Antarctica Southern Ocean Wilkes Land |
genre_facet |
Antarc* Antarctica Southern Ocean Wilkes Land |
op_relation |
doi:10.1029/2012PA002308 issn:0883-8305 issn:1944-9186 orcid:0000-0002-4834-4190 OCE1058858 |
op_doi |
https://doi.org/10.1029/2012PA002308 |
container_title |
Paleoceanography |
container_volume |
27 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766267547703836672 |