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:
deep convection
deep-water temperature
Mg/Ca
Southern Ocean
DEPTH, sediment/rock
AGE
Melonis affinis, Magnesium/Calcium ratio
Uvigerina sp., Magnesium/Calcium ratio
Deep water temperature
Calypso Square Core System
Inductively coupled plasma - mass spectrometry ICP-MS
MD159
Marion Dufresne 1995
Online Access:https://dx.doi.org/10.1594/pangaea.922135
https://doi.pangaea.de/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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