Grain size analysis on CRP sediment cores from the Ross Sea, Antarctica ...

• Main Authors: Naish, Tim R, Barrett, Peter J, Dunbar, Gavin B, Woolfe, Ken, Dunn, A G, Henrys, Stuart A, Claps, Michele, Powell, Ross, Fielding, Christopher R
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2001
• Subjects: Core wireline system; CRP-2; CRP-3; Sampling/drilling from ice; Cape Roberts Project CRP; Antarc*; Antarctica; antartic*; Ross Sea; Victoria Land
• Online Access: https://dx.doi.org/10.1594/pangaea.510762; https://doi.pangaea.de/10.1594/PANGAEA.510762

The upper 1200 m of pre-Pliocene sediment recovered by Cape Roberts Project (CRP) drilling off the Victoria Land coast of Antarctica between 1997-1999 has been subdivided into 54 unconformity-bound stratigraphic sequences, spanning the period c. 32 to 17 Ma. The sequences are recognised on the basis of the cyclical vertical stacking of their constituent lithofacies, which are enclosed by erosion surfaces produced during the grounding of the advancing ice margin onto the sea floor. Each sequence represents deposition in a range of offshore shelf to coastal glacimarine sedimentary environments during oscillations in the ice margin across the Western Ross Sea shelf, and coeval fluctuations in water depth. This paper applies spectral analysis techniques to depth- and time-series of sediment grain size (500 samples) for intervals of the core with adequate chronological data. Time series analysis of 0.5-l.0m-spaced grainsize data spanning sequences 9-11 (CRP-2/2A) and sequences 1-7 (CRP-3) suggests that the length ... : Supplement to: Naish, Tim R; Barrett, Peter J; Dunbar, Gavin B; Woolfe, Ken; Dunn, A G; Henrys, Stuart A; Claps, Michele; Powell, Ross; Fielding, Christopher R (2001): Sedimentary cyclicity in CRP drillcore, Victoria Land Basin, Antarctica. Terra Antartica, 8(3), 225-244 ...