Deep-water temperatures from the Southern Ocean during HS4

Foraminiferal magnesium to calcium ratios (Mg/Ca) are reported for two benthic species, drawn from down-core marine sediment samples obtained from the deep Southern Ocean. Samples of 4-10 individual benthic foraminifera, of the species Globobulimina affinis and/or Uvigerina sp., were oxidatively cle...

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Bibliographic Details
Main Author: Skinner, Luke C
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
AGE
Calypso Square Core System
CASQS
deep convection
Deep water temperature
deep-water temperature
DEPTH
sediment/rock
IMAGES XV - Pachiderme
Inductively coupled plasma - mass spectrometry (ICP-MS)
Marion Dufresne (1995)
MD07-3076
MD07-3076Q
MD159
Melonis affinis
Magnesium/Calcium ratio
Mg/Ca
Southern Ocean
Uvigerina sp.
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.922135
https://doi.org/10.1594/PANGAEA.922135
Description
Summary:Foraminiferal magnesium to calcium ratios (Mg/Ca) are reported for two benthic species, drawn from down-core marine sediment samples obtained from the deep Southern Ocean. Samples of 4-10 individual benthic foraminifera, of the species Globobulimina affinis and/or Uvigerina sp., were oxidatively cleaned according to a standard protocol, involving clay/detrital material removal, methanol rinses, buffered oxidation of organic matter, weak acid leaching, and deionised water rinses, followed by visual inspection of the remaining calcite fragments. After dissolution, samples were analysed by inductively coupled plasma mass spectrometry (ICP-MS). The analytical internal reproducibility is better than 2%. The efficiency of cleaning to remove external contaminant phases was screened on the basis of Fe/Ca ratios, which here remain below 0.05 mmol/mol.

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