(Table 1) Pore water isotopes from DSDP Hole 74-525B, with respect to the Vienna-SMOW standard

During the coring of Hole 525B with the hydraulic piston corer, a number of sediment samples were squeezed and the pore waters retained for stable isotope study. Both 18O/16O and D/H ratios were determined on the same samples. Within the limits of experimental error the measurements are consistent w...

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Bibliographic Details
Main Authors: Bath, Adrian, Shackleton, Nicholas J
Format: Dataset
Language:English
Published: PANGAEA 1984
Subjects:
74-525B
Deep Sea Drilling Project
DEPTH
sediment/rock
DRILL
Drilling/drill rig
DSDP
DSDP/ODP/IODP sample designation
Glomar Challenger
Leg74
Sample code/label
see reference(s)
South Atlantic/CREST
δ18O
standard deviation
water
δ Deuterium
Antarctic
The Antarctic
Antarc*
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.810514
https://doi.org/10.1594/PANGAEA.810514
Description
Summary:During the coring of Hole 525B with the hydraulic piston corer, a number of sediment samples were squeezed and the pore waters retained for stable isotope study. Both 18O/16O and D/H ratios were determined on the same samples. Within the limits of experimental error the measurements are consistent with the variations resulting from evaporation-precipitation processes; there is no evidence that diagenetic processes in the sediment affected the isotopic composition of the waters, which therefore reflect changes in the isotopic composition of the ocean during the Cenozoic. The data are consistent with the hypothesis that a change of about 0.9 per mil (18O/16O) occurred during the middle Miocene, reflecting the growth of the Antarctic ice sheet at that time.

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