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Oxygen-isotope records, age-model results and sedimentation rates of core MD88-784

Created 25/06/2017

Updated 11/08/2023

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Core MD88-784 was recovered during the French ASPARA IV cruise in 1988, aboard the Marion Dufresne. The core was located on the Tasman Fracture Zone of the Mid-Ocean Ridge, within the Polar Front Zone.

Isotopic analysis was performed on tests of the planktonic foraminifera Neogloboquadrina pachyderma (200-250um), and indicate that the core contains isotope stages 1 to 3. The base of the core is found to reach the oxygen isotope stage 3-4 boundary.

The core is considered to have lost the uppermost section of the core that converts the last 3kyr against the SPECMAP stack. The results also indicate that the Holocene period has the highest rates of sedimentation observed through time. Further variations (excluding isotope-stage 1) appear to indicate that a reduction of the sedimentation rate occurred during the interglacial periods, in contrast to that of the glacials.

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Title Oxygen-isotope records, age-model results and sedimentation rates of core MD88-784
Language English
Licence Creative Commons Attribution 2.5 Australia
Landing Page https://data.gov.au/data/dataset/88a55751-16bd-4784-ba9a-bad642ce0eb8
Contact Point
Department of Biological Sciences, Macquarie University
leanne.armand@mq.edu.au
Reference Period 25/06/2017
Geospatial Coverage
Map data © OpenStreetMap contributors
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Data Portal Data.gov.au