Age determination of three sediment cores ...

• Published in: Deep Sea Research Part II: Topical Studies in Oceanography
• Main Authors: Nowaczyk, Norbert R, Antonow, Martin, Knies, Jochen, Spielhagen, Robert F
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2003
• Subjects: Kasten corer; Gravity corer Kiel type; ARK-IV/3; ARK-VII/1; ARK-VIII/2; Polarstern; Arctic Ocean; Fram Strait; Greenland; Greenland Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.762397; https://doi.pangaea.de/10.1594/PANGAEA.762397

A total of five sediment cores from three sites, the Arctic Ocean, the Fram Strait and the Greenland Sea, yielded evidence for geomagnetic reversal excursions and associated strong lows in relative palaeointensity during oxygen isotope stages 2 and 3. A general similarity of the obtained relative palaeointensity curves to reference data can be observed. However, in the very detail, results from this high-resolution study differ from published records in a way that the prominent Laschamp excursion is clearly characterized by a significant field recovery when reaching the steepest negative inclinations, whereas only the N-R and R-N transitions are associated with the lowest values. Two subsequent excursions also reach nearly reversed inclinations but without any field recovery at that state. A total of 41 accelerator mass spectrometry (AMS) 14C ages appeared to allow a better age determination of these three directional excursions and related relative palaeointensity variations. However, although the three ... : Supplement to: Nowaczyk, Norbert R; Antonow, Martin; Knies, Jochen; Spielhagen, Robert F (2003): Further rock magnetic and chronostratigraphic results on reversal excursions during the last 50 ka as derived from northern high latitudes and discrepancies in precise AMS 14C dating. Geophysical Journal International, 155(3), 1065-1080 ...