(Table 1) Strontium isotope data for marine carbonates of sediment core CRP-3

Strontium isotope stratigraphy was used to date 5 discrete horizons within the CRP-3 drillhole. A single in situ modiolid bivalve fragment at 10.88 mbsf gives an age of 30.9 (±0.8) Ma for the associated sediment. The four remaining well preserved fragments recovered from 29.94-190.31 mbsf are within...

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Bibliographic Details
Main Author: Lavelle, Mark
Format: Dataset
Language:English
Published: PANGAEA 2001
Subjects:
Age
dated
range
maximum
minimum
strontium isotope
LOWESS fit Howarth & McArthur (1997)
Cape Roberts Project
Comment
Core wireline system
CRP
CRP-3
CWS
Depth
bottom/max
top/min
Isotope ratio mass spectrometry
Lithologic unit/sequence
Preservation
Ross Sea
Sample type
Sampling/drilling from ice
Shell debris
Strontium-87/Strontium-86 ratio
error
Cape Roberts
McArthur
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.184981
https://doi.org/10.1594/PANGAEA.184981
Description
Summary:Strontium isotope stratigraphy was used to date 5 discrete horizons within the CRP-3 drillhole. A single in situ modiolid bivalve fragment at 10.88 mbsf gives an age of 30.9 (±0.8) Ma for the associated sediment. The four remaining well preserved fragments recovered from 29.94-190.31 mbsf are within error of this age, indicating a high sedimentation rate and suggesting little time is missing in disconformities. The diagenetic alteration of carbonate macrofossils by continental fluids (and possibly seawater) is a common feature to 320 mbsf.

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