Orbital scale variations and timescales from the Arctic Ocean
Orbital scale variations and timescales from the Arctic Ocean
We investigate geochemical measurements from the Arctic Coring Expedition to derive sedimentation rates for selected intervals in the early and middle Eocene. This analysis is performed by quantifying cyclical variations in physical property data and elemental concentrations derived with an X-ray fluorescence (XRF) core scanner. Our results show that physical properties and XRF-derived elemental concentrations are coherent and correlated to each other. Changes in elemental concentrations occur on depth scales from decimeters to meters and correspond to varying contributions of detrital minerals and biogenic silica. We confirm and refine sedimentation rates of the order of 10 to 25 m Ma?1. These rates were obtained independently through biostratigraphic and magnetostratigraphic methods. We observe a strong imprint of astronomically sourced cycles, particularly through climatic precession. This observation allows us to test recently proposed theoretical calculations of insolation.
Arctic, Eocene, Milankovitch
PA1S10
Pälike, H.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Spofforth, D.J.A.
b989dfad-64d8-482a-8e49-8a0bbc1c7ad7
O'Regan, M.
83b80486-4e18-4089-9b12-361232727095
Gattacceca, J.
b6b9450e-73c5-4c19-9e0a-595809e16530
2008
Pälike, H.
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Spofforth, D.J.A.
b989dfad-64d8-482a-8e49-8a0bbc1c7ad7
O'Regan, M.
83b80486-4e18-4089-9b12-361232727095
Gattacceca, J.
b6b9450e-73c5-4c19-9e0a-595809e16530
Pälike, H., Spofforth, D.J.A., O'Regan, M. and Gattacceca, J.
(2008)
Orbital scale variations and timescales from the Arctic Ocean.
Paleoceanography, 23, .
(doi:10.1029/2007PA001490).
Abstract
We investigate geochemical measurements from the Arctic Coring Expedition to derive sedimentation rates for selected intervals in the early and middle Eocene. This analysis is performed by quantifying cyclical variations in physical property data and elemental concentrations derived with an X-ray fluorescence (XRF) core scanner. Our results show that physical properties and XRF-derived elemental concentrations are coherent and correlated to each other. Changes in elemental concentrations occur on depth scales from decimeters to meters and correspond to varying contributions of detrital minerals and biogenic silica. We confirm and refine sedimentation rates of the order of 10 to 25 m Ma?1. These rates were obtained independently through biostratigraphic and magnetostratigraphic methods. We observe a strong imprint of astronomically sourced cycles, particularly through climatic precession. This observation allows us to test recently proposed theoretical calculations of insolation.
Text
Palike_2007PA001490.pdf
- Version of Record
Restricted to Registered users only
Request a copy
More information
Published date: 2008
Keywords:
Arctic, Eocene, Milankovitch
Identifiers
Local EPrints ID: 50751
URI: http://eprints.soton.ac.uk/id/eprint/50751
ISSN: 0883-8305
PURE UUID: 4b18ab6b-b8be-43d9-9ca6-5cf2f5b2df48
Catalogue record
Date deposited: 19 Mar 2008
Last modified: 07 Jan 2022 22:30
Export record
Altmetrics
Contributors
Author:
H. Pälike
Author:
D.J.A. Spofforth
Author:
M. O'Regan
Author:
J. Gattacceca
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