Nd and Sm isotopic record from fossil fish teeth recovered from ODP Site 177-1090 ...

• Main Authors: Scher, Howie D, Martin, Ellen E
• Format: Dataset
• Language: English
• Published: PANGAEA 2008
• Subjects: DEPTH, sediment/rock; AGE; Samarium-147/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Neodymium; ε-Neodymium 0; ε-Neodymium T; ε-Neodymium, error; Composite Core; Leg177; Joides Resolution; Ocean Drilling Program ODP; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.832492; https://doi.pangaea.de/10.1594/PANGAEA.832492

Neodymium (Nd) isotopes were measured on 181 samples of fossil fish teeth recovered from Oligocene to Miocene sections at Ocean Drilling Program Site 1090 (3700 m water depth) on Agulhas Ridge in the Atlantic sector of the Southern Ocean. A long-term decreasing trend toward less radiogenic Nd isotope compositions dominates the record. This trend is interrupted by shifts toward more radiogenic compositions near the early/late Oligocene boundary and the Oligocene/Miocene boundary. Overall, epsilon-Nd values at Agulhas Ridge are more radiogenic than at other Atlantic locations, and are similar to those at Indian Ocean locations. The pattern of variability is remarkably similar to Nd isotope results from Walvis Ridge (South Atlantic) and Ninetyeast Ridge (Indian Ocean). In contrast, Agulhas Ridge and Maud Rise Nd isotope records do not show similar patterns over this interval. Results from this study indicate that deep water in the Atlantic flowed predominantly from north to south during the Oligocene and ... : DEPTH, sediment/rock [m] is given in mcd. ...