Skip to Main Content
Book Chapter

Colour logging as a tool in high-resolution palaeoceanography

By
M. Rogerson
M. Rogerson
1
National Oceanography Centre European Way, Southampton SO14 3ZH, UK
2
Department of Geography, University of Hull Cottingham Road, Hull HU6 7RX, UK (e-mail: m.rogerson@hull.ac.uk)
Search for other works by this author on:
P. P. E. Weaver
P. P. E. Weaver
1
National Oceanography Centre European Way, Southampton SO14 3ZH, UK
Search for other works by this author on:
E. J. Rohling
E. J. Rohling
1
National Oceanography Centre European Way, Southampton SO14 3ZH, UK
Search for other works by this author on:
L. J. Lourens
L. J. Lourens
3
Faculty of Geoscience, University of Utrecht Budapestlaan, 4, 3584 CD, Utrecht, The Netherlands
Search for other works by this author on:
J. W. Murray
J. W. Murray
1
National Oceanography Centre European Way, Southampton SO14 3ZH, UK
Search for other works by this author on:
A. Hayes
A. Hayes
4
Department of Geology, Royal Holloway College Egham, Surrey TW20 0EX, UK
Search for other works by this author on:
Published:
January 01, 2006

Abstract

Colour and diffuse reflectance records can be used to develop astronomically tuned age models for long sediment cores. Here, we present high-resolution (1 mm) colour records from a sediment core from the western Gulf of Cadiz of SW Spain (D13892), spanning the last deglaciation, in parallel with stable isotope (δ18O) and sea surface temperature (SST) proxy data. The age model is based on δ18O stratigraphy complemented by five atomic mass spectroscopy (AMS) radiocarbon datings. We find good comparison between the colour record of D13892 and the GISP2 oxygen isotope series (R2 = 0.81), which strongly suggests that the sediment colour reflects the state of the climate. As sediment colour variability has previously been found to be diagnostic of changes in mineralogical/chemical composition, we relate the causes of the colour variability in D13892 to changes in the local particle flux, and support these observations with data from core-logging X-ray fluorescence (XRF) analyses. The colour and XRF logger records for D13892 suggest that the last glaciation and Younger Dryas were characterized by an enhanced supply of terrigenous detritus into the western Gulf of Cadiz. Cyclicities with wavelengths of 607 and 1375 years are recognized in the colour records for the Holocene. This cyclicity also relates to variability in detrital supply, with an important eolian component implied by enrichment in hematite during cycle maxima.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

New Techniques in Sediment Core Analysis

R. G. Rothwell
R. G. Rothwell
National Oceanography Centre, UK
Search for other works by this author on:
Geological Society of London
Volume
267
ISBN electronic:
9781862395152
Publication date:
January 01, 2006

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal