| Autor: |
Wellner, J. S., Gohl, K., Klaus, A., Bauersachs, T., Bohaty, S. M., Courtillat, M., Cowan, E. A., De Lira Mota, M. A., Esteves, M. S. R., Fegyveresi, J. M., Frederichs, T., Gao, L., Halberstadt, A. R., Hillenbrand, C.-D., Horikawa, K., Iwai, M., Kim, J.-H., King, T. M., Klages, J. P., Passchier, S. |
| Předmět: |
|
| Zdroj: |
Proceedings of the International Ocean Discovery Program, Expedition Reports; 2/23/2021, Vol. 379, Following p1-46, 95p |
| Abstrakt: |
Site U1533 (Proposed Site ASRE-09A) is located 62 km west-southwest of Site U1532 on the westernmost lower flank of Resolution Drift, the same sediment drift where Site U1532 was drilled, on the continental rise of the Amundsen Sea (Figure F1; see Figure F1 in the Expedition 379 summary chapter [Gohl et al., 2021b]). This lowermost flank is bound by a north–south oriented deep-sea channel west of Site U1533 (Uenzelmann-Neben and Gohl, 2012). The channel is likely the path of sediment transported downslope from the shelf via turbidity currents and mass transport deposits and, as such, is likely the major source of sedimentary components to the drill site (e.g., Dowdeswell et al., 2006). Bottom currents transported the finer fractions of the sediments and deposited them to form a drift (e.g., Nitsche et al., 2000). A robust horizon correlation from Site U1532 performed via three connected seismic lines indicates that sedimentary sequences of the same age are more condensed at Site U1533. Four holes (U1533A–U1533D) were drilled at Site U1533 in water depths between 4179 and 4184 m (Figure F2). The deepest penetration (Hole U1533B) reached 383 m with an overall core recovery of 70%. As at Site U1532, frequent approaches of icebergs of various sizes were the primary reason for the larger number of holes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
