Upper Eocene to Oligocene strontium, carbon and oxygen isotope record of DSDP holes

We improved upper Eocene to Oligocene deep-sea chronostratigraphic control by integrating isotope (87Sr/86Sr, delta18O, delta13C) stratigraphy and magnetostratigraphy. Most previous attempts to establish the timing of isotope fluctuations have relied upon biostratigraphic age estimates which have un...

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Bibliographic Details
Main Authors: Miller, Kenneth G, Feigenson, Mark D, Kent, Dennis V, Olsson, Richard K
Format: Dataset
Language:English
Published: PANGAEA 1988
Subjects:
73-522
73-522A
80-548A
80-549A
Deep Sea Drilling Project
DRILL
Drilling/drill rig
DSDP
Glomar Challenger
Leg73
Leg80
North Atlantic/SPUR
South Atlantic/PLATEAU
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.726896
https://doi.org/10.1594/PANGAEA.726896
Description
Summary:We improved upper Eocene to Oligocene deep-sea chronostratigraphic control by integrating isotope (87Sr/86Sr, delta18O, delta13C) stratigraphy and magnetostratigraphy. Most previous attempts to establish the timing of isotope fluctuations have relied upon biostratigraphic age estimates which have uncertainties of 0.5 to over 4.0 m.y. Deep Sea Drilling Project (DSDP) Site 522 contains the best available upper Eocene to Oligocene magnetostratigraphic record which allows first-order correlations of isotope records (87Sr/86Sr, delta18O, delta13C) to the Geomagnetic Polarity Time Scale (GPTS). Empirical calibrations between the 87Sr/86Sr of foraminifera and magnetochronology at Site 522 allow more precise correlation of ,unknown' samples with the GPTS. For example, shallow water and high-latitude sections may be tied into the deep-sea record. Sr-isotope stratigraphic resolution for the latest Eocene to Oligocene is approximately 2 m.y.

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