Oxygen-isotope records, age-model results and sedimentation rates of core MD88-779

• Other Authors: Armand, Leanne (hasPrincipalInvestigator), De Deckker, Patrick (collaborator), Department of Geology, The Australian National University (ANU) (hasAssociationWith), Pichon, Jean-Jacques (collaborator), The Australian National University (ANU) (hasAssociationWith), Université of Bordeaux I (hasAssociationWith)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: climatologyMeteorologyAtmosphere; environment; FORAMINIFERS; EARTH SCIENCE; BIOLOGICAL CLASSIFICATION; PROTISTS; AMOEBOIDS; OXYGEN ISOTOPES; PALEOCLIMATE; OCEAN/LAKE RECORDS; SEDIMENTATION; OCEANS; MARINE SEDIMENTS; Age model; C. wuellerstorfi; 51200000; Antarctic; Southern Ocean; Indian; South Tasman Rise; Antarc*; Antarctique*; Institute of Antarctic and Southern Ocean Studies; Sea ice
• Online Access: https://researchdata.edu.au/oxygen-isotope-records-md88-779/679824

Maintenance and Update Frequency: notPlanned Statement: Material was recovered using a Kullenberg core. The method used to produce diatom slides from sediment samples is described in the 'methodology' document uploaded with this record. Statement: Each core age-model must be considered provisional since additional independent tie-points to age have not been made, such as AMS 14C dating of the foraminifera in the surface sediments, nor was the oxygen isotopic data of the cores at high resolution. Parameters: Oxygen-isotope core depth (cm), delta 18O from benthic foraminifera (C. wuellerstorfi), tie points in SPECMAP age scale (ka), corresponding SPECMAP age scale (ka), linear sedimentation rate (cm/ka), diatom core depth (cm), Analyseries extrapolated age scale (ka) at 10cm intervals, core sample dry weights (gm), field of views counted, diatom subtotal, number of diatom frustules (x1000000)/gm dry weight. Credit Mountain Mass Spectrometry Laboratory (Colorado) Credit Institute of Antarctic and Southern Ocean Studies (IASOS) Credit Institut Français pour la Recherche et Technologie Polaires (IFRTP) Credit Terres Australes et Antarctiques Françaises (TAAF) Credit Australian Postgraduate Research Award (APRA) Purpose To reconstruct the first sea-surface temperature and sea-ice record history of the Southern Ocean south of Australia. Core MD88-779 was taken during the 1988 French ASPARA IV cruise in the South East Indian Ocean aboard the Marion DuFresne. The core was situated on the South Tasman Rise (47º50.690S, 146º32.750E) at a depth of 2260m. Although the core recovered was 6.7m long, only the top 2.6m were studied as preliminary investigations had indicated that this section covered the last two glacial cycles. Isotopic analysis was performed on tests of the benthic foraminifera Cibicidoides wuellerstorfi. The record contains two climatic cycles that reach into isotope-stage 7. The benthic isotope curve of core MD88-779, however, shows a melding of isotopic stages 3-5, which are difficult to ...