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Weber, Michael E; Wiedicke-Hombach, Michael; Kudrass, Hermann-Rudolph; Erlenkeuser, Helmut (2003): Physical properties of 39 sediment cores from the Bengal Fan and northeast Indian Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.648716, Supplement to: Weber, ME et al. (2003): Bengal Fan sediment transport activity and response to climate forcing inferred from sediment physical properties. Sedimentary Geology, 155(3-4), 361-381, https://doi.org/10.1016/S0037-0738(02)00187-2

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Abstract:
We obtained sediment physical properties and geochemical data from 47 piston and gravity cores located in the Bay of Bengal, to study the complex history of the Late Pleistocene run-off from the Ganges and Brahmaputra rivers and its imprint on the Bengal Fan. Grain-size parameters were predicted from core logs of density and velocity to infer sediment transport energy and to distinguish different environments along the 3000-km-long transport path from the delta platform to the lower fan. On the shelf, 27 cores indicate rapidly prograding delta foresets today that contain primarily mud, whereas outer shelf sediment has 25% higher silt contents, indicative of stronger and more stable transport regime, which prevent deposition and expose a Late Pleistocene relic surface. Deposition is currently directed towards the shelf canyon 'Swatch of No Ground', where turbidites are released to the only channel–levee system that is active on the fan during the Holocene. Active growth of the channel–levee system occurred throughout sea-level rise and highstand with a distinct growth phase at the end of the Younger Dryas. Coarse-grained material bypasses the upper fan and upper parts of the middle fan, where particle flow is enhanced as a result of flow-restriction in well-defined channels. Sandier material is deposited mainly as sheet-flow deposits on turbidite-dominated plains at the lower fan. The currently most active part of the fan with 10-40 cm thick turbidites is documented for the central channel including inner levees (e.g., site 40).
Site 47 from the lower fan far to the east of the active channel–levee system indicates the end of turbidite sedimentation at 300 ka for that location. That time corresponds to the sea-level lowering during late isotopic stage 9 when sediment supply to the fan increased and led to channel avulsion farther upstream, probably indicating a close relation of climate variability and fan activity. Pelagic deep-sea sites 22 and 28 contain a 630-kyear record of climate response to orbital forcing with dominant 21- and 41-kyear cycles for carbonate and magnetic susceptibility, respectively, pointing to teleconnections of low-latitude monsoonal forcing on the precession band to high-latitude obliquity forcing. Upper slope sites 115, 124, and 126 contain a record of the response to high-frequency climate change in the Dansgaard–Oeschger bands during the last glacial cycle with shared frequencies between 0.75 and 2.5 kyear. Correlation of highs in Bengal Fan physical properties to lows in the d18O record of the GISP2 ice-core suggests that times of greater sediment transport energy in the Bay of Bengal are associated with cooler air temperatures over Greenland. Teleconnections were probably established through moisture and other greenhouse-gas forcing that could have been initiated by instabilities in the methane hydrate reservoir in the oceans.
Coverage:
Median Latitude: 14.579312 * Median Longitude: 87.859533 * South-bound Latitude: 0.032670 * West-bound Longitude: 79.426330 * North-bound Latitude: 21.350830 * East-bound Longitude: 91.867330
Date/Time Start: 1994-01-10T13:32:00 * Date/Time End: 1994-02-17T18:35:00
Event(s):
SO93/1_01KL * Latitude: 7.068170 * Longitude: 79.426330 * Date/Time: 1994-01-10T13:32:00 * Elevation: -1688.0 m * Location: Gulf of Mannar * Campaign: SO93/1 (BENGAL FAN) * Basis: Sonne * Device: Piston corer (BGR type) (KL) * Comment: slope off Colombo, Colour cycles
SO93/1_09KL * Latitude: 3.500000 * Longitude: 80.500170 * Date/Time: 1994-01-12T10:47:00 * Elevation: -4371.0 m * Location: Indian Ocean * Campaign: SO93/1 (BENGAL FAN) * Basis: Sonne * Device: Piston corer (BGR type) (KL) * Comment: bent corer, top 30 cm lost
SO93/1_19KL * Latitude: 0.032670 * Longitude: 80.750670 * Date/Time: 1994-01-14T02:39:00 * Elevation: -4630.0 m * Location: Indian Ocean * Campaign: SO93/1 (BENGAL FAN) * Basis: Sonne * Device: Piston corer (BGR type) (KL) * Comment: bent corer, top 25 cm lost 70 cm reconstructed
Size:
39 datasets

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Datasets listed in this publication series

  1. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-107KL. https://doi.org/10.1594/PANGAEA.205443
  2. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-114SL. https://doi.org/10.1594/PANGAEA.205444
  3. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-126KL. https://doi.org/10.1594/PANGAEA.205445
  4. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-19KL. https://doi.org/10.1594/PANGAEA.205446
  5. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-1KL. https://doi.org/10.1594/PANGAEA.205442
  6. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-24KL. https://doi.org/10.1594/PANGAEA.205447
  7. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-27KL. https://doi.org/10.1594/PANGAEA.205448
  8. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-28KL. https://doi.org/10.1594/PANGAEA.205449
  9. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-29KL. https://doi.org/10.1594/PANGAEA.205450
  10. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-32KL. https://doi.org/10.1594/PANGAEA.205451
  11. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-34KL. https://doi.org/10.1594/PANGAEA.205452
  12. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-36KL. https://doi.org/10.1594/PANGAEA.205453
  13. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-39KL. https://doi.org/10.1594/PANGAEA.205454
  14. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-42KL. https://doi.org/10.1594/PANGAEA.205455
  15. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-45KL. https://doi.org/10.1594/PANGAEA.205456
  16. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-46KL. https://doi.org/10.1594/PANGAEA.205457
  17. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-47KL. https://doi.org/10.1594/PANGAEA.205458
  18. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-49KL. https://doi.org/10.1594/PANGAEA.205459
  19. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-51KL. https://doi.org/10.1594/PANGAEA.205460
  20. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-54KL. https://doi.org/10.1594/PANGAEA.205461
  21. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-56KL. https://doi.org/10.1594/PANGAEA.205462
  22. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-63KL. https://doi.org/10.1594/PANGAEA.205463
  23. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-66SL. https://doi.org/10.1594/PANGAEA.205464
  24. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-68SL. https://doi.org/10.1594/PANGAEA.205465
  25. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-69SL. https://doi.org/10.1594/PANGAEA.205466
  26. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-70SL. https://doi.org/10.1594/PANGAEA.205467
  27. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-71SL. https://doi.org/10.1594/PANGAEA.205468
  28. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-77SL. https://doi.org/10.1594/PANGAEA.205469
  29. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-78SL. https://doi.org/10.1594/PANGAEA.205470
  30. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-79SL. https://doi.org/10.1594/PANGAEA.205471
  31. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-80SL. https://doi.org/10.1594/PANGAEA.205472
  32. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-82SL. https://doi.org/10.1594/PANGAEA.205473
  33. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-83KL. https://doi.org/10.1594/PANGAEA.205474
  34. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-84KL. https://doi.org/10.1594/PANGAEA.205475
  35. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-85KL. https://doi.org/10.1594/PANGAEA.205476
  36. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-86KL. https://doi.org/10.1594/PANGAEA.205477
  37. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-87KL. https://doi.org/10.1594/PANGAEA.205478
  38. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-96KL. https://doi.org/10.1594/PANGAEA.205479
  39. Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (2003): Physical properties of sediment core SO93-9KL. https://doi.org/10.1594/PANGAEA.205480