(Table 1) The 10Be and 9Be isotope record of IODP EXP202 composite Site ...

• Main Authors: Frank, Martin, Backman, Jan, Jakobsson, Martin, Vescovali, Isabelle, O'Regan, Matthew, King, John W, Haley, Brian A, Kubik, Peter W, Garbe-Schönberg, Dieter
• Format: Dataset
• Language: English
• Published: PANGAEA 2008
• Subjects: Event label; DEPTH, sediment/rock; Sample code/label; AGE; Beryllium-10; Beryllium-10, standard deviation; Beryllium-9; Beryllium-10/Beryllium-9; Beryllium-10/Beryllium-9, standard deviation; Piston corer; DSDP/ODP/IODP sample designation; Inductively coupled plasma - mass spectrometry ICP-MS; Exp302; ODEN-96; CCGS Captain Molly Kool Vidar Viking; Oden; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; International Polar Year 2007-2008 IPY; Arctic Ocean; International Polar Year; IPY; Lomonosov Ridge; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.734478; https://doi.pangaea.de/10.1594/PANGAEA.734478

The upper 200 m of the sediments recovered during IODP Leg 302, the Arctic Coring Expedition (ACEX), to the Lomonosov Ridge in the central Arctic Ocean consist almost exclusively of detrital material. The scarcity of biostratigraphic markers severely complicates the establishment of a reliable chronostratigraphic framework for these sediments, which contain the first continuous record of the Neogene environmental and climatic evolution of the Arctic region. Here we present profiles of cosmogenic 10Be together with the seawater-derived fraction of stable 9Be obtained from the ACEX cores. The down-core decrease of 10Be/9Be provides an average sedimentation rate of 14.5 ± 1 m/Ma for the uppermost 151 m of the ACEX record and allows the establishment of a chronostratigraphy for the past 12.3 Ma. The age corrected 10Be concentrations and 10Be/9Be ratios suggest the existence of an essentially continuous sea ice cover over the past 12.3 Ma. ... : DEPTH, sediment/rock [m] is given in mcd. Hiatusus in 302-M0002a between 135.49 and 140.44 mcd, in 96/09-1pc between 1.69 and 1.79 mcd. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...