(Table 1) Stable oxygen and carbon isotope composition of bivalve shells of sediment core CRP-1, and of Wright Valley and McMurdo Sound ...

• Main Authors: Taviani, Marco, Zahn, Rainer
• Format: Dataset
• Language: English
• Published: PANGAEA 1998
• Subjects: Event label; Latitude of event; Longitude of event; DEPTH, sediment/rock; Epoch; Sample comment; δ18O, skeletal carbonate; δ18O, standard deviation; δ13C, skeletal carbonate; δ13C, standard deviation; Core wireline system; Outcrop sample; Mass spectrometer Finnigan MAT 252; CRP-1; Sampling/drilling ice; Cape Roberts Project CRP; Antarc*; Antarctic; Antarctica; antartic*; McMurdo Sound; Ross Sea; Victoria Land
• Online Access: https://dx.doi.org/10.1594/pangaea.545108; https://doi.pangaea.de/10.1594/PANGAEA.545108

Bivalve shells from the CRP-l drillhole, Cape Roberts (Victoria Land Basin), have been analysed for their stable isotope composition to obtain information on Antarctic coastal palaeoceanography during the middle Pleistocene and early Miocene. Shells from a middle Pleistocene carbonate-rich unit (lithostratigraphic Unit 3.1; 33.82-3 1.89 metres below sea floor) have d180 values between +3.64 and +4.56 per mil PDB and d13C between +0.85 and + 1.09 per mil PDB. Oxygen isotopic compositions are close to or at equilibrium conditions with scawater at a temperature in the range of c. -2 to 0°C in the absence of melt water influx. Thus, the CRP-1 carbonate-unit was deposited under 'interglacial' polar conditions, comparable to those of the present-day and isotope stage 3 in the Ross Sea. 'Chlamys' sp. 1, retrieved from a lower Miocene diamictite at 62.19 mbsf, is the only unaltered shell of this age in CRP-1 and yielded a d18O value of -4.64 per mil PDB and d13C of -3.35 per mil PDB. These values show that ... : Supplement to: Taviani, Marco; Zahn, Rainer (1998): The stable oxygen isotope record of Pleistocene and Miocene bivalves in the CRP-1 drillhole, Victoria Land Basin, Antarctica. Terra Antartica, 5(3), 419-423 ...