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

• 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

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.