(Table 1) Nd-Hf isotopes from leachates and detrital materials of the Arctic sediments ...

• Main Authors: Chen, Tian-Yu, Frank, Martin, Haley, Brian A, Gutjahr, Marcus, Spielhagen, Robert F
• Format: Dataset
• Language: English
• Published: PANGAEA 2012
• Subjects: Event label; Sample code/label; Comment; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; AGE; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, standard deviation; ε-Neodymium; Hafnium-176/Hafnium-177; Hafnium-176/Hafnium-177, standard deviation; ε-Hafnium; Sampling gear, diverse; Multiple investigations; Box corer; Giant box corer; Kasten corer; Exp302; BP97; ARK-XXII/2; ARK-VIII/3; CCGS Captain Molly Kool Vidar Viking; Akademik Boris Petrov; Polarstern; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Arctic Ocean; North Atlantic; North Pole
• Online Access: https://dx.doi.org/10.1594/pangaea.871708; https://doi.pangaea.de/10.1594/PANGAEA.871708

The warm and saline North Atlantic inflow to the Arctic Ocean is a major component of high northern latitude circulation and the main mechanism of deep water renewal in the Arctic Ocean. Knowledge of its past variability is critical for understanding the high latitude feedback mechanisms of the climate system. Here we present the first combined seawater Hf and Nd isotope compositions of past Arctic Intermediate Water extracted from the authigenic Fe?Mn oxyhydroxide fraction of two sediment cores recovered near the North Pole, to reconstruct changes in contributions from glacial brines of the Eurasian shelf and past inflow of Atlantic waters. The Hf and Nd isotopic compositions obtained from leachates of the authigenic fraction show closely coupled and environmentally controlled variations over the past 14 million years. An observed offset of these data from seawater e-Hf and e-Nd compositions from other ocean basins (seawater array) is interpreted as the result of continuously prevailing glacial weathering ... : Supplement to: Chen, Tian-Yu; Frank, Martin; Haley, Brian A; Gutjahr, Marcus; Spielhagen, Robert F (2012): Variations of North Atlantic inflow to the central Arctic Ocean over the last 14 million years inferred from hafnium and neodymium isotopes. Earth and Planetary Science Letters, 353-354, 82-92 ...