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. and Yamane, M. (2012) Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction. Paleoceanography, 27 2: PA2214.1-PA2214.19. doi:10.1029/2012PA002308


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.
Total Author Count Override 31
Title Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Lan Margin: constraints for paleoceanographic reconstruction
Journal name Paleoceanography   Check publisher's open access policy
ISSN 0883-8305
1944-9186
Publication date 2012
Sub-type Article (original research)
DOI 10.1029/2012PA002308
Volume 27
Issue 2
Start page PA2214.1
End page PA2214.19
Total pages 19
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell
Collection year 2013
Language eng
Abstract 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.
Keyword Antarctica
Eocene
GTS
Biostratigraphy
Magnetostratigraphy
Paleoclimate
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online: 28 June 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2013 Collection
 
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Created: Fri, 05 Apr 2013, 12:07:13 EST by Ashleigh Paroz on behalf of School of Earth Sciences