Major and trace element concentrations of sediments from the IODP Exp302 sites ...

• Main Authors: Martinez, Nahysa C, Murray, Richard W, Dickens, Gerald Roy, Kölling, Martin
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2009
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Arctic Ocean; Kara Sea; laptev; Laptev Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.787157; https://doi.pangaea.de/10.1594/PANGAEA.787157

We analyzed a suite of sediment samples recovered in the central Arctic Ocean for major, trace, and rare earth elements in order to assess changes in terrigenous source material throughout the Cenozoic. The terrigenous component consists of two end-members. Input from a shale-like composition dominates bulk sediments, especially those deposited during the Paleocene and since the Miocene, and may represent sediment supply from the eastern Laptev Sea. Therefore, even though the environment and transport mechanisms may have varied from ice free to ice dominated, sequences of the early Paleogene and later Neogene appear to have been influenced by a single major terrigenous source. This suggests similar transport capabilities and trajectories for both ocean and drift currents through significant parts of the Cenozoic. Influence from a more mafic source appears to be more important through the early Eocene to the middle Miocene and most likely represents material from the western Laptev Sea or Kara Sea. Thus, ... : Supplement to: Martinez, Nahysa C; Murray, Richard W; Dickens, Gerald Roy; Kölling, Martin (2009): Discrimination of sources of terrigenous sediment deposited in the central Arctic Ocean through the Cenozoic. Paleoceanography, 24, PA1210 ...