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Diekmann, Bernhard; Petschick, Rainer; Gingele, Franz; Fütterer, Dieter K; Abelmann, Andrea; Brathauer, Uta; Gersonde, Rainer; Mackensen, Andreas (1996): Clay mineralogy of sediment cores from the South Atlantic and the Adjoining Southern Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.728694, Supplement to: Diekmann, B et al. (1996): Clay mineral fluctuations in Late Quaternary sediments of the Southeastern South Atlantic: implications for past changes of deep water advection. In: Wefer, G; Berger, W H; Siedler, G & Webb, D (eds.), The South Atlantic: Present and Past Circulation. Springer-Verlag, Berlin, 118, 621-644

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Abstract:
In the South Atlantic and adjoining Southern Ocean the kaolinite/chlorite-ratio in Late Quaternary sediments are an alternative deep water proxy to benthic foraminiferal proxies and carbonate preservation indices that is even suitable in regions with poor carbonate preservation. This paper shows the relationship between modern abyssal circulation and the kaolinite/chloriteratio and presents reconstructions of deep and bottom water advection based on the kaolinite/chlorite proxy. We also discuss the limitations and future perspectives of the kaolinite/chlorite proxy. Latitudinal and water depth-related patterns of the kaolinite/chlorite-ratio in surface sediments correspond to the modern deep and bottom water mass distribution. Kaolinite originates from lowlatitudes and traces North Atlantic Deep Water (northern-source deep water) advection to the south. Chlorite from the southern high-latitudes is exported via northward advecting Antarctic Bottom Water and Circumpolar Deep Water (southern-source deep and bottom water). Deep-sea sedimentation in regions underlying the Antarctic Circumpolar Current was current-dominated throughout the Late Quaternary. Temporal variations of the kaolinite/chlorite-ratio in response to glacial-interglacial cycles reflect changing deep water mass configurations, suggesting a shallowing and northward retreat of northern-source deep water and accordingly wider expansion of southernsource deep and bottom water masses during glacial times relative to interglacial times. Submarine topography influenced the spatial and temporal patterns of deep water mass distribution.
Coverage:
Median Latitude: -46.739670 * Median Longitude: 5.205635 * South-bound Latitude: -62.344160 * West-bound Longitude: -14.490000 * North-bound Latitude: -21.578333 * East-bound Longitude: 15.364830
Date/Time Start: 1984-03-03T00:00:00 * Date/Time End: 1993-12-24T06:58:00
Event(s):
PS1225-1 (PS04/539) * Latitude: -57.043330 * Longitude: 9.233500 * Date/Time: 1984-03-03T00:00:00 * Elevation: -5408.0 m * Recovery: 13.51 m * Location: Atlantic Ridge * Campaign: ANT-II/4 (PS04) * Basis: Polarstern * Method/Device: Gravity corer (Kiel type) (SL) * Comment: 15 core sections: 0-1.02, 1.02-2.05, 2.05-2.39, 2.39-3.39, 3.39-4.39, 4.39-5.4, 5.4-6.4, 6.4-7.41, 7.41-8.41, 8.41-9.4, 9.4-10.4, 10.4-11.4, 11.4-12.4, 12.4-13.33, 13.33-13.51 m
PS1225-2 (PS04/540) * Latitude: -57.043301 * Longitude: 9.233500 * Date/Time: 1984-03-03T00:00:00 * Elevation: -5408.0 m * Penetration: 0.51 m * Recovery: 0.51 m * Location: Atlantic Ridge * Campaign: ANT-II/4 (PS04) * Basis: Polarstern * Method/Device: Giant box corer (GKG)
PS1226-1 (PS04/542) * Latitude: -54.532830 * Longitude: 10.313330 * Date/Time: 1984-03-04T00:00:00 * Elevation: -4033.0 m * Penetration: 9 m * Recovery: 8.73 m * Location: Atlantic Ridge * Campaign: ANT-II/4 (PS04) * Basis: Polarstern * Method/Device: Gravity corer (Kiel type) (SL) * Comment: 10 core sections: 0-0.78, 0.78-1.68, 1.68-2.58, 2.58-3.48, 3.48-4.22, 4.22-5.12, 5.12-6.03, 6.03-6.93, 6.93-7.83, 7.83-8.73 m
Size:
22 datasets

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Datasets listed in this publication series

  1. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core GeoB1034-3. https://doi.org/10.1594/PANGAEA.51155
  2. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core GeoB1035-5. https://doi.org/10.1594/PANGAEA.51156
  3. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core GeoB1214-1. https://doi.org/10.1594/PANGAEA.51157
  4. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1225-2. https://doi.org/10.1594/PANGAEA.51151
  5. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1226-1. https://doi.org/10.1594/PANGAEA.51418
  6. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1433-1. https://doi.org/10.1594/PANGAEA.51419
  7. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1435-1. https://doi.org/10.1594/PANGAEA.51420
  8. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1450-1. https://doi.org/10.1594/PANGAEA.51421
  9. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1751-7. https://doi.org/10.1594/PANGAEA.51422
  10. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1752-1. https://doi.org/10.1594/PANGAEA.51423
  11. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1754-1. https://doi.org/10.1594/PANGAEA.51424
  12. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1756-5. https://doi.org/10.1594/PANGAEA.51426
  13. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1765-2. https://doi.org/10.1594/PANGAEA.51427
  14. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1768-8. https://doi.org/10.1594/PANGAEA.51152
  15. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1768-8. https://doi.org/10.1594/PANGAEA.51425
  16. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1769-1. https://doi.org/10.1594/PANGAEA.51428
  17. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS1772-8. https://doi.org/10.1594/PANGAEA.51429
  18. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS2082-1. https://doi.org/10.1594/PANGAEA.51432
  19. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS2102-2. https://doi.org/10.1594/PANGAEA.51433
  20. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS2495-3. https://doi.org/10.1594/PANGAEA.51153
  21. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of sediment core PS2498-1. https://doi.org/10.1594/PANGAEA.51154
  22. Diekmann, B; Petschick, R; Gingele, F et al. (1996): Clay mineralogy of site PS1225. https://doi.org/10.1594/PANGAEA.51417