Pleistocene benthic stable isotopes and ice-rafted debris from the Agulhas Plateau Composite (APcomp)

• Main Authors: Starr, Aidan, Hall, Ian R, Ziegler, Martin
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: 361-U1475B; 361-U1475C; 361-U1475E; 361-U1475F; Accumulation rate; ice rafted debris by number; sediment; AGE; Agulhas Plateau; CALYPSO; Calypso Corer; Cibicidoides wuellerstorfi; δ13C; δ18O; Date/Time of event; Density; dry bulk; Depth; composite; DRILL; Drilling/drill rig; Event label; Exp361; Ice rafted debris; Ice-rafted debris; Joides Resolution; Latitude of event; Longitude of event; Marion Dufresne (1995); Mass spectrometer; Thermo Finnigan; MAT 253; MD02-2588; MD02-2588Q; MD128; mid-Pleistocene transition; Sample ID; Sedimentation rate; South African Climates (Agulhas LGM Density Profile); Southern Ocean; SWAF; Dee
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.921111; https://doi.org/10.1594/PANGAEA.921111

The Agulhas Plateau composite (APcomp) is a stratigraphic framework made up of sediment core sites MD02-2588 (41 19.90'S, 25 49.7'E, 2907m) and IODP Site U1475 (41 25.6'S, 25 15.6'E, 2669m). Stable isotope measurements were performed on 2-3 Cibicidoides wuellerstorfi specimens (250-315μm size fraction) and made on a Thermo Finnigan MAT 253 mass spectrometer linked online to a Carbo Kiel carbonate preparation device at Cardiff University with long-term precision of ±0.05‰ for δ18O and ±0.021‰ for δ13C (±1σ). Results are calibrated to an internal laboratory standard (BCT63) and presented relative to the Vienna Pee Dee Belemnite scale. IRD is defined as detrital mineral grains (excluding volcanic ash) >150μm. IRD is normalized to sample weight (IRD concentration in #/g) and then multiplication by apparent bulk mass accumulation rate derived from estimates of dry bulk density and linear sedimentation rate.