Geochemistry for sediment core MD02-2496 ...

• Main Authors: Chang, Alice S, Pedersen, Thomas F, Hendy, Ingrid L
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: DEPTH, sediment/rock; Depth, corrected; AGE; Chlorinity; Nitrogen, total; Carbon, total; Carbon in carbonate; Calcium carbonate; Carbon, organic, total; Carbon, organic, fraction; Carbon, organic, terrestrial matter; Carbon, organic, marine matter; Silicon; Opal, biogenic silica; δ15N, bulk sediment; δ13C, organic carbon; Aluminium; Silver; Silver/Aluminium ratio; Cadmium; Cadmium/Aluminium ratio; Rhenium; Rhenium/Aluminium ratio; Uranium; Uranium/Aluminium ratio; Molybdenum; Molybdenum/Aluminium ratio; Barium; Barium/Aluminium ratio; Iron; Iron/Aluminium ratio; Manganese; Manganese/Aluminium ratio; Giant piston corer; interpolated; Salt-corrected; MD126; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Greenland; Greenland ice core; ice core
• Online Access: https://dx.doi.org/10.1594/pangaea.833298; https://doi.pangaea.de/10.1594/PANGAEA.833298

Variations in chalcophile and redox-sensitive trace elements are examined at high-resolution intervals from a ~50 kyr long sediment core (MD02-2496) from the Vancouver Island margin. Enrichments of Ag, Cd, Re, U, and Mo above lithogenous levels, signifying sedimentary suboxia and anoxia, occurred during the early Holocene and Bølling/Allerød, and during warm interstadial events of Marine Isotope Stage (MIS) 3. Down-core trace element profiles co-vary with productivity proxy records (opal, CaCO3, and marine organic carbon), and with sedimentary nitrogen isotope ratios, which reflect variably enriched nitrate upwelled from intermediate waters that were transported northward from the Eastern Tropical North Pacific. The similarity of the MD02-2496 record with records from the southern portion of the California Current System (CCS), and to the Greenland ice core oxygen isotope record during warm climate intervals, suggests that sedimentary redox conditions along the California Current responded to local ... : Age is based on calibrated and interpolated radiocarbon ages. PI of Age and corrected depth is Ingrid Hendy ([e-mail]). ...