Benthic and planktonic oxygen and carbon isotopes and XRF data at IODP Site U1385 and core MD01-2444 from 0 to 1.5 Ma

• Main Authors: Hodell, David A, Crowhurst, Simon J, Lourens, Lucas Joost, Margari, Vasiliki, Nicolson, John, Rolfe, James E, Skinner, Luke C, Thomas, Nicola C, Tzedakis, Polychronis C, Mleneck-Vautravers, Maryline J, Wolff, Eric William
• Format: Other/Unknown Material
• Language: English
• Published: PANGAEA 2023
• Subjects: Benthic and planktonic foraminifera; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; IODP 339; MD01-2444; oxygen and carbon isotopes; XRF data; Planktonic foraminifera
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.951401; https://doi.org/10.1594/PANGAEA.951401

Data consist of a continuous millennially-resolved record of oxgyen and carbon stable isotope composition of planktonic and benthic foraminifera at IODP Site U1385 and piston core MD01-2444 from the southwestern Iberian margin for the last 1.5 million years. Elemental ratios (Ca/Ti and Zr/Sr) are also reported from the composite section of Site U1385 and core MD01-2444. Oxygen and carbon isotope measurements of planktic and benthic foraminifera were made at an average temporal resolution of ~200 years for the last 1.45 million years. For planktic foraminifera, the surface-dwelling species Globigerina bulloides from the 250 - 350 um size fraction was used. Benthic foraminifer data consists mostly of Cibicidoides wuellerstorfi and occasionally other species of Cibicidoides were measured from the >212 um size fraction. In samples where specimens of Cibicidoides spp. were absent, we used d18O of Uvigerina peregrina or Globobulimina affinis. All δ18O values for each species were corrected to Uvigerina using the offsets suggested by Shackleton et al. (2000) -- i.e., +0.64 for Cibicidoides and -0.3 for G. affinis. Stable isotope measurements were made in the Godwin Laboratory for Palaeoclimate research at the University of Cambridge. Foraminifer tests were crushed and soaked in a solution of 1% hydrogen per-oxide for 30 min in individual vials. Acetone was added and the samples placed in an ultra-sonic bath for 10 s, after which the liquid was carefully decanted to remove any contaminants. The samples were dried in an oven at 50 °C overnight. Isotopic analyses of the samples were per-formed using a VG SIRA mass spectrometer with a Multicarb system for samples with a mass exceeding 80 μg. Analytical precision is estimated to be ±0.08‰ for both δ18O and δ13C. For smaller samples (<80 μg), measurements were performed on a Thermo Finnigan MAT253 mass spectrometer fitted with a Kiel device. Analytical precision is estimated to be ±0.08‰ for δ18O and ±0.06‰ for δ13C, respectively. All results are reported relative to ...