Age determination with strontium isotopes on sediment core CRP-1 from the Ross Sea, Antarctica

• Main Author: Lavelle, Mark
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; off Cape Roberts; Ross Sea; Antarctica; Sampling/drilling ice; Cape Roberts; Roberts Cape; Antarc*
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.510750; https://doi.org/10.1594/PANGAEA.510750

Strontium isotope stratigraphy was used to date five discrete horizons within CRP-1. Early and late Quaternary (0.87-1.3 Ma and 0-0.67 Ma respectively) age sediments overlie a major sequence boundary at 43.15 meters below sea floor (mbsf). This hiatus is estimated to account for ~16 m.y. of missing section. Early Miocene (16.6-~20.8-25 Ma) age deposits below this boundary are in turn cut by multiple erosion surface representing hiatus is of between 0.2 and 1.2 m.y. Estimated minimum sedimentation rates range between 0.9 and 2.8 cm/k.y. in the Quaternary, and 1.5 and 6.4 cm/ky in the lower Miocene.