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Dittmers, Klaus Hauke; Niessen, Frank; Stein, Ruediger (2003): Physical properties of 22 sediment cores from the Kara Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.802253, Supplement to: Dittmers, KH et al. (2003): Holocene sediment budget and sedimentary history of the Ob and Yenisei estuaries. In: Stein, R; Fahl, K; Fütterer, D K; Galimov, E M & Stepanets, O V (eds.), Siberian River Run-off in the Kara Sea: Characterisation, Quantification, Variability, and Environmental Significance, 488 pp. Proceedings in Marine Sciences, Elsevier, Amsterdam, 6, 457-488

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Abstract:
High-resolution acoustic data and several sediment gravity cores taken in the Ob and Yenisei estuaries allow us to balance the Holocene sediment budget of both rivers and to reconstruct their sedimentary history. Cores were radiocarbon dated and linked to acoustic profiles using whole-core physical properties.
The Ob and Yenisei estuaries, with their sea water fresh water mixing zone, act as major sediment sinks for fluvial derived terrigeneous material in Holocene times. Most of the suspended and large amounts of dissolved matter precipitate in this zone termed "marginal filter". High thickness of Holocene sediments occurs between 72°N and 73°30'N where a distinct decrease in thickness is observed to the north. Two major acoustic units could be differentiated, separated by a prominent reflector interpreted as the base of the Holocene. High-resolution echosound data suggest a fluvial dominated depositional environment for the early Holocene displaying lateral accretion as point bars and vertical accreted overbank deposits in a fluvial channel-levee-complex. During the early Holocene sea-level rise the marginal filter migrated progressively southward (upstream) to its present position forming a typical high-stand system tract in acoustic images. Estuarine sedimentation in a sedimentary environment similar to today started at approximately 5 Cal. kyrs. BP. An estimated total of 14.3 * 10**10 t and 9.2 * 10**9 t of fine-grained brackish-marine sediments, in the Ob and Yenisei estuaries, respectively, were accumulated during Holocene times. This is only about 75% and about 50% of Ob and Yenisei estuarine sediment budgets, respectively, estimated by extrapolation of recent river run-off data over the last 7500 years. Filled paleoriver channels indicate active river incision in the southern part of the Kara Sea shelf prior to the Holocene.
Project(s):
Coverage:
Median Latitude: 72.853357 * Median Longitude: 77.303684 * South-bound Latitude: 68.914833 * West-bound Longitude: 73.027500 * North-bound Latitude: 74.298667 * East-bound Longitude: 81.602617
Date/Time Start: 1999-08-26T00:00:00 * Date/Time End: 2001-09-10T00:00:00
Size:
22 datasets

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Datasets listed in this publication series

  1. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP00-14/04. https://doi.org/10.1594/PANGAEA.137059
  2. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP00-15/05. https://doi.org/10.1594/PANGAEA.137060
  3. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP00-22/05. https://doi.org/10.1594/PANGAEA.137061
  4. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP00-23/06. https://doi.org/10.1594/PANGAEA.137062
  5. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP00-38/02. https://doi.org/10.1594/PANGAEA.137063
  6. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-03/03. https://doi.org/10.1594/PANGAEA.137064
  7. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-25/02. https://doi.org/10.1594/PANGAEA.137065
  8. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-26/02. https://doi.org/10.1594/PANGAEA.137066
  9. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-70/07. https://doi.org/10.1594/PANGAEA.137067
  10. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-71/03. https://doi.org/10.1594/PANGAEA.137068
  11. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-72a/02. https://doi.org/10.1594/PANGAEA.137081
  12. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-73/05. https://doi.org/10.1594/PANGAEA.137070
  13. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-80/06. https://doi.org/10.1594/PANGAEA.137071
  14. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-82/07. https://doi.org/10.1594/PANGAEA.137072
  15. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP01-83/02. https://doi.org/10.1594/PANGAEA.138326
  16. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-04/06. https://doi.org/10.1594/PANGAEA.137074
  17. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-05/01. https://doi.org/10.1594/PANGAEA.137075
  18. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-08/07. https://doi.org/10.1594/PANGAEA.137076
  19. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-09/01. https://doi.org/10.1594/PANGAEA.137077
  20. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-32/09. https://doi.org/10.1594/PANGAEA.137078
  21. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-38/06. https://doi.org/10.1594/PANGAEA.137079
  22. Dittmers, KH; Niessen, F; Stein, R (2003): Physical properties of sediment core BP99-39/06. https://doi.org/10.1594/PANGAEA.137080