The University of Southampton
University of Southampton Institutional Repository

Millennial - to centennial - scale interruptions of the Oceanic Anoxic Event 1b (Early Albian, mid-Cretaceous) inferred from benthic foraminiferal repopulation events

Friedrich, O., Nishi, H., Pross, J.O., Schmiedl, G. and Hemleben, C. (2005) Millennial - to centennial - scale interruptions of the Oceanic Anoxic Event 1b (Early Albian, mid-Cretaceous) inferred from benthic foraminiferal repopulation events Palaios, 20, (1), pp. 64-77. (doi:10.2110/palo.2003.p03-75).

Record type: Article

Abstract

The Early Albian Oceanic Anoxic Event 1b (OAE 1b) black shale is interrupted by one or more ventilation events that display significant changes in benthic and planktic populations. Within the OAE 1b sections studied, at ODP Site 1049, DSDP Site 545, and the Vocontian Basin, the benthic foraminiferal repopulation events last between 500 and 1,250 years and occur with a cyclicity of approximately 5.7 kyr. This period may represent an amplitude modulation of the precessional cycle. The OAE 1b sections from the marginal setting of the Vocontian Basin exhibit up to eight repopulation events. In contrast, there is only one repopulation event identified in the Atlantic OAE 1b sections from the Mazagan Plateau (DSDP 545) and Blake Nose (ODP 1049). Within the margin of dating uncertainties, this supraregional repopulation event occurred synchronously in the Vocontian Basin and the Atlantic Ocean. While the OAE 1b black shale formed under extremely warm and humid conditions, the repopulation events occurred during intervals of short-term cooling and reduced humidity at deep-water formation sites. The resulting increase in evaporation led to enhanced formation of low-latitude deep water, thus improving the ventilation of the sea floor.

Full text not available from this repository.

More information

Published date: February 2005

Identifiers

Local EPrints ID: 49986
URI: http://eprints.soton.ac.uk/id/eprint/49986
ISSN: 0883-0351
PURE UUID: 1046b403-a975-49e9-8277-98120bec2f2a

Catalogue record

Date deposited: 08 Jan 2008
Last modified: 17 Jul 2017 14:54

Export record

Altmetrics

Contributors

Author: O. Friedrich
Author: H. Nishi
Author: J.O. Pross
Author: G. Schmiedl
Author: C. Hemleben

University divisions

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.

×