The University of Southampton
University of Southampton Institutional Repository

Early Cenozoic Stratigraphy of the Equatorial Pacific and the Eocene Revealed (abstract of paper presented at AGU Fall Meeting, San Francisco, 6-10 Dec 2002)

Early Cenozoic Stratigraphy of the Equatorial Pacific and the Eocene Revealed (abstract of paper presented at AGU Fall Meeting, San Francisco, 6-10 Dec 2002)
Early Cenozoic Stratigraphy of the Equatorial Pacific and the Eocene Revealed (abstract of paper presented at AGU Fall Meeting, San Francisco, 6-10 Dec 2002)
The broad mound of sediments found in the equatorial Pacific contains a detailed and complex record of the history of equatorial divergence, trade wind strength, biogeochemical fluxes, and biologic evolution. To extract this history from the biogenic sediments of this region the recovery of undisturbed and complete sections is required. Also required is the development of a detailed chronostratigraphy with which we can determine both the times and rates of paleoceanographic and paleoclimatic change. As this mound of sediment has ridden northward on the Pacific crust the most biogenic parts of the lower Cenozoic sediments have gradually moved from under the region of high flux rates at the divergence center. Now they lie within the reach of APC coring on the JOIDES Resolution. The sections recovered on Leg 199 form a paleolatitude transect from about 4.5$°S to 18.5$°N. Study of these sections has given us a well documented magnetic stratigraphy back into the Eocene, good calcareous nannofossil stratigraphy for the lower Miocene, Oligocene, and early Eocene, and excellent radiolarian stratigraphy from the lower Miocene through the middle Eocene. In addition we recovered good the Miocene/Oligocene and Eocene/Oligocene boundaries in an equatorial setting and LPTM sections near basement at three different sites. These results have allowed a more certain assignment of ages of biostratigraphic events and an opportunity to develop orbitally tuned time scales in sections from the lower Miocene down through the Oligocene. The initial estimates of sediment accumulation rates in the radiolarian oozes indicate variation by a factor of three from upper to middle Eocene times. Mapped patterns of sediment accumulation in the Eocene using both ODP Leg 199 and older DSDP data indicate at least two latitudinal zones of maxima in accumulation rates. Determination of the exact latitudes of these zones awaits further study.
0096-3941
p.F946
Moore, T.C.
7bbc9539-0103-4010-8a24-f31124baacfb
Sanfillipo, A.
3da4a05b-78f0-4df2-b097-b1a58cd77b9a
Nigrini, C.A.
d441b7ac-92d1-4740-8d52-757efe6b1a7b
Lyle, M.
32ca0536-0600-4193-bc16-70fbe8c99dd6
Wilson, P.A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Janecek, T.R.
cb111528-5025-48fe-a999-35ee27d2643c
Backman, J.
b2d77581-60c6-44fd-b61e-9dfbd85f2a8f
Busch, W.H.
d9359d43-f3f6-4b3c-bf42-7a5aa03bb988
Coxall, H.K.
5de02922-b619-4e86-b7ba-373b8569716a
Faul, K.
51d38cd0-209f-4bf3-82da-21afefd791f2
Gaillot, P.
e02ae278-5e9b-49d2-8a69-0e1178242ee6
Knoop, P.
39747243-531b-45ec-b24e-b35a475e8152
Kruse, S.
0239ee82-29f9-4407-bf1e-88b6922ff726
Lanci, L.
0905f57d-d835-49c9-9356-efc950a171db
Lear, C.H.
112c634b-d610-4413-ad3d-5991b454593e
Nishi, H.
c60453b0-21bc-41e4-b576-7a2b6ecfb7ce
Nomura, R.
484a31d7-1be2-4286-8bb6-76da13b119f6
Norris, R.D.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Pälike, H.
0fcb0c7a-6a64-445d-810b-7f5f8fe686d1
Parés, J.M.
2d4ed8d8-fc18-4e93-b566-a359623c99ea
Quintin, L.
0c0f2f23-2248-4aaa-a55b-ce0c9f7bb720
Raffi, I.
5cd0b487-3cdc-48e6-894c-2bbf5c59ae02
Rea, B.R.
8d964c93-27ee-4aeb-8e39-b9fc8f06985a
Rea, D.K.
6e297131-e1f7-4dd4-96ce-2895853ddbe0
Steiger, T.H.
3b42f7f3-256c-4cea-a25a-a2306135b0e6
Tripati, A.K.
39b60a55-55e5-41fd-8c4d-d235ff4a0087
Vanden Berg, M.D.
6977449f-5441-41e6-acf4-8edf8b003fa1
Wade, B.S.
4caf9386-0e3f-479b-a491-6c8dff99dad1
Moore, T.C.
7bbc9539-0103-4010-8a24-f31124baacfb
Sanfillipo, A.
3da4a05b-78f0-4df2-b097-b1a58cd77b9a
Nigrini, C.A.
d441b7ac-92d1-4740-8d52-757efe6b1a7b
Lyle, M.
32ca0536-0600-4193-bc16-70fbe8c99dd6
Wilson, P.A.
f940a9f0-fa5a-4a64-9061-f0794bfbf7c6
Janecek, T.R.
cb111528-5025-48fe-a999-35ee27d2643c
Backman, J.
b2d77581-60c6-44fd-b61e-9dfbd85f2a8f
Busch, W.H.
d9359d43-f3f6-4b3c-bf42-7a5aa03bb988
Coxall, H.K.
5de02922-b619-4e86-b7ba-373b8569716a
Faul, K.
51d38cd0-209f-4bf3-82da-21afefd791f2
Gaillot, P.
e02ae278-5e9b-49d2-8a69-0e1178242ee6
Knoop, P.
39747243-531b-45ec-b24e-b35a475e8152
Kruse, S.
0239ee82-29f9-4407-bf1e-88b6922ff726
Lanci, L.
0905f57d-d835-49c9-9356-efc950a171db
Lear, C.H.
112c634b-d610-4413-ad3d-5991b454593e
Nishi, H.
c60453b0-21bc-41e4-b576-7a2b6ecfb7ce
Nomura, R.
484a31d7-1be2-4286-8bb6-76da13b119f6
Norris, R.D.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Pälike, H.
0fcb0c7a-6a64-445d-810b-7f5f8fe686d1
Parés, J.M.
2d4ed8d8-fc18-4e93-b566-a359623c99ea
Quintin, L.
0c0f2f23-2248-4aaa-a55b-ce0c9f7bb720
Raffi, I.
5cd0b487-3cdc-48e6-894c-2bbf5c59ae02
Rea, B.R.
8d964c93-27ee-4aeb-8e39-b9fc8f06985a
Rea, D.K.
6e297131-e1f7-4dd4-96ce-2895853ddbe0
Steiger, T.H.
3b42f7f3-256c-4cea-a25a-a2306135b0e6
Tripati, A.K.
39b60a55-55e5-41fd-8c4d-d235ff4a0087
Vanden Berg, M.D.
6977449f-5441-41e6-acf4-8edf8b003fa1
Wade, B.S.
4caf9386-0e3f-479b-a491-6c8dff99dad1

Moore, T.C., Sanfillipo, A., Nigrini, C.A., Lyle, M., Wilson, P.A., Janecek, T.R., Backman, J., Busch, W.H., Coxall, H.K., Faul, K., Gaillot, P., Knoop, P., Kruse, S., Lanci, L., Lear, C.H., Nishi, H., Nomura, R., Norris, R.D., Pälike, H., Parés, J.M., Quintin, L., Raffi, I., Rea, B.R., Rea, D.K., Steiger, T.H., Tripati, A.K., Vanden Berg, M.D. and Wade, B.S. (2002) Early Cenozoic Stratigraphy of the Equatorial Pacific and the Eocene Revealed (abstract of paper presented at AGU Fall Meeting, San Francisco, 6-10 Dec 2002). EOS: Transactions American Geophysical Union, 83 (47, Supplement), p.F946.

Record type: Article

Abstract

The broad mound of sediments found in the equatorial Pacific contains a detailed and complex record of the history of equatorial divergence, trade wind strength, biogeochemical fluxes, and biologic evolution. To extract this history from the biogenic sediments of this region the recovery of undisturbed and complete sections is required. Also required is the development of a detailed chronostratigraphy with which we can determine both the times and rates of paleoceanographic and paleoclimatic change. As this mound of sediment has ridden northward on the Pacific crust the most biogenic parts of the lower Cenozoic sediments have gradually moved from under the region of high flux rates at the divergence center. Now they lie within the reach of APC coring on the JOIDES Resolution. The sections recovered on Leg 199 form a paleolatitude transect from about 4.5$°S to 18.5$°N. Study of these sections has given us a well documented magnetic stratigraphy back into the Eocene, good calcareous nannofossil stratigraphy for the lower Miocene, Oligocene, and early Eocene, and excellent radiolarian stratigraphy from the lower Miocene through the middle Eocene. In addition we recovered good the Miocene/Oligocene and Eocene/Oligocene boundaries in an equatorial setting and LPTM sections near basement at three different sites. These results have allowed a more certain assignment of ages of biostratigraphic events and an opportunity to develop orbitally tuned time scales in sections from the lower Miocene down through the Oligocene. The initial estimates of sediment accumulation rates in the radiolarian oozes indicate variation by a factor of three from upper to middle Eocene times. Mapped patterns of sediment accumulation in the Eocene using both ODP Leg 199 and older DSDP data indicate at least two latitudinal zones of maxima in accumulation rates. Determination of the exact latitudes of these zones awaits further study.

Text
agu2002_moore.pdf - Other
Download (83kB)
Text
agu2002_moore.html - Other
Download (4kB)

More information

Published date: 2002

Identifiers

Local EPrints ID: 41883
URI: http://eprints.soton.ac.uk/id/eprint/41883
ISSN: 0096-3941
PURE UUID: 21b4ea9a-cd13-4abb-9d12-876555a5404d
ORCID for P.A. Wilson: ORCID iD orcid.org/0000-0001-6425-8906

Catalogue record

Date deposited: 17 Oct 2006
Last modified: 16 Mar 2024 03:13

Export record

Contributors

Author: T.C. Moore
Author: A. Sanfillipo
Author: C.A. Nigrini
Author: M. Lyle
Author: P.A. Wilson ORCID iD
Author: T.R. Janecek
Author: J. Backman
Author: W.H. Busch
Author: H.K. Coxall
Author: K. Faul
Author: P. Gaillot
Author: P. Knoop
Author: S. Kruse
Author: L. Lanci
Author: C.H. Lear
Author: H. Nishi
Author: R. Nomura
Author: R.D. Norris
Author: H. Pälike
Author: J.M. Parés
Author: L. Quintin
Author: I. Raffi
Author: B.R. Rea
Author: D.K. Rea
Author: T.H. Steiger
Author: A.K. Tripati
Author: M.D. Vanden Berg
Author: B.S. Wade

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×