Differential response at the seafloor during Palaeocene and Eocene ocean warming events at Walvis Ridge, Atlantic Ocean (ODP Site 1262)

Online Access: Get full text
doi: 10.1111/ter.12250
Author(s): Deprez, Arne; Jehle, Sofie; Bornemann, André; Speijer, Robert P.
Author Affiliation(s): Primary:
Katholieke Universiteit Leuven, Department of Earth and Environmental Sciences, Heverlee, Belgium
Other:
Universität Leipzig, Germany
Volume Title: Terra Nova
Source: Terra Nova, 29(1), p.71-76. Publisher: Wiley-Blackwell, Oxford, United Kingdom. ISSN: 0954-4879
Note: In English. 45 refs.; illus., incl. 1 table
Summary: The Latest Danian Event (LDE, c. 62.1 Ma) is an early Palaeogene hyperthermal or transient (<200 ka) ocean warming event. We present the first deep-sea benthic foraminiferal faunal record to study deep-sea biotic changes together with new benthic (Nuttallides truempyi) stable isotope data from Walvis Ridge Site 1262 (Atlantic Ocean) to evaluate whether the LDE was controlled by similar processes as the minor early Eocene hyperthermals. The spacing of the double negative δ13C and δ18O excursion and the slope of the δ18O-δ13C regression are comparable, strongly suggesting a similar orbital control and pacing of eccentricity maxima as well as a rather homogeneous carbon pool. However, in contrast to early Eocene hyperthermals, the LDE exhibits a remarkable stability of the benthic foraminiferal fauna. This lack of benthic response could be related to the absence of threshold-related circulation changes or better pre-adaptation to elevated deep-sea temperatures, as the LDE was superimposed on a cooling trend, in contrast to early Eocene warming. Abstract Copyright (2017), John Wiley & Sons, Ltd.
Year of Publication: 2017
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; C-13/C-12; Carbon; Cenozoic; Danian; Electron microscopy data; Eocene; Foraminifera; Isotope ratios; Isotopes; Leg 198; Leg 208; Lower Paleocene; Microfossils; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 1209; ODP Site 1210; ODP Site 1262; Ocean Drilling Program; Ocean warming events; Oxygen; Pacific Ocean; Paleocene; Paleogene; SEM data; Shatsky Rise; South Atlantic; Stable isotopes; Tertiary; Walvis Ridge; West Pacific
Coordinates: S271100 S271100 E0013500 E0013400
N323900 N324000 E1583100 E1583000
N321300 N321300 E1581600 E1581600
Record ID: 2018005552
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom