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Kowalski, Elizabeth A; Meyers, Philip A (1997): (Table 1) Concentrations of CaCO3 and organic carbon, organic matter atomic C/N ratios and delta13C values of sediment samples from Site DSDP 594. PANGAEA,, Supplement to: Kowalski, EA; Meyers, PA (1997): Glacial-interglacial variations in Quaternary production of marine organic matter at DSDP Site 594, Chatham Rise, southeastern New Zealand margin. Marine Geology, 140(3-4), 249-263,

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CaCO3 and total organic carbon concentrations, organic matter C/N and carbon isotope ratios, and sediment accumulation rates in late Quaternary sediments from DSDP Site 594 provide information about glacial–interglacial variations in the delivery of organic matter to the Chatham Rise offshore of southeastern New Zealand. Low C/N ratios and nearly constant organic delta13C values of ?23‰ indicate that marine production dominates organic matter supply in both glacial and interglacial times during oxygen isotope stages 1 through 6 (0–140 ka) and 17 through 19 (660–790 ka). Increased organic carbon mass accumulation rates in isotope stages 2, 4, 6, and 18 record enhanced marine productivity during glacial maxima. Excursions of organic delta13C values to ca. ?29‰ in portions of isotope stage 2 suggest that the local concentration of dissolved CO2 was occasionally elevated during the last glacial maximum, probably as a result of short periods of lowered sea-surface temperature. Dilution of carbonates by clastic continental sediment generally increases at this location during glacial maxima, but enhanced delivery of land-derived organic matter does not accompany the increased accumulation of clastic sediments.
Latitude: -45.523500 * Longitude: 174.948000
Date/Time Start: 1983-01-03T00:00:00 * Date/Time End: 1983-01-03T00:00:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 81.89 m
90-594 * Latitude: -45.523500 * Longitude: 174.948000 * Date/Time: 1983-01-03T00:00:00 * Elevation: -1204.0 m * Penetration: 505.1 m * Recovery: 300.7 m * Location: South Pacific/CONT RISE * Campaign: Leg90 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 50 cores; 475.3 m cored; 28.8 m drilled; 63.3 % recovery
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Sample code/labelSample labelKowalski, Elizabeth ADSDP/ODP/IODP sample designation
3Calcium carbonateCaCO3%Kowalski, Elizabeth AGas volumetric
4Carbon, organic, totalTOC%Kowalski, Elizabeth AElement analyser CHNS-O, Carlo Erba EA1108
5Carbon/Nitrogen ratioC/NKowalski, Elizabeth ACalculatedatomic ratio
6δ13C, organic carbonδ13C Corg‰ PDBKowalski, Elizabeth AMass spectrometer Finnigan Delta-S
508 data points

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