Physical properties of 22 sediment cores from the Kara Sea ...
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...
| Main Authors: | , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2003
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.802253 https://doi.pangaea.de/10.1594/PANGAEA.802253 |
| Summary: | 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 ... : Supplement to: Dittmers, Klaus Hauke; Niessen, Frank; Stein, Ruediger (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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