Radiocarbon age and sedimentation rates of bottom sediments in the Obskaya Gube (Ob River estuary
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| Autori principali: | , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2003
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| _version_ | 1867169503486410752 |
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| author | Kuptsov, Vladimir M Lisitzin, Alexander P |
| author_facet | Kuptsov, Vladimir M Lisitzin, Alexander P |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Complex geological-geochemical studies of water column and bottom sediments were carried out during Cruise 49 of R/V "Dmitry Mendeleev" in the Kara Sea shelf zone along the Obskaya Guba (Ob River estuary) from the Pur River and Taz River mouths to 76°N. Carbon-14 concentrations in organic matter from bottom sediments were determined at 5 stations. Constant initial 14C concentration model was used to determine sedimentation rates that were taken as a basis for calculating ages of sediment cores and their separate parts and for inferring location of a depocenter, i.e. a region of maximal discharge of fine-dispersed fraction of suspended matter of river run-off. Sedimentation rate in the depocenter is 170 cm/ka. Southward moves of the depocenter were recorded for periods of sea-level rises 2 and 5 thousand years ago. Bottom sediments in the depocenter contain 45% of organic matter primary produced in the Obskaya Guba. This organic matter is an energetic basis for bottom fauna life. About 55% of organic matter comes with river run-off. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_761919 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radiocarbon age and sedimentation rates of bottom sediments in the Obskaya Gube (Ob River estuary Kuptsov, Vladimir M Lisitzin, Alexander P Archive of Ocean Data; ARCOD; DM49; DM49-4397-2; DM49-4414-1; DM49-4415-1; DM49-4416-1; DM49-4417-1; Dmitry Mendeleev; GC; Gravity corer; Kara Sea; SPASIBAIII Complex geological-geochemical studies of water column and bottom sediments were carried out during Cruise 49 of R/V "Dmitry Mendeleev" in the Kara Sea shelf zone along the Obskaya Guba (Ob River estuary) from the Pur River and Taz River mouths to 76°N. Carbon-14 concentrations in organic matter from bottom sediments were determined at 5 stations. Constant initial 14C concentration model was used to determine sedimentation rates that were taken as a basis for calculating ages of sediment cores and their separate parts and for inferring location of a depocenter, i.e. a region of maximal discharge of fine-dispersed fraction of suspended matter of river run-off. Sedimentation rate in the depocenter is 170 cm/ka. Southward moves of the depocenter were recorded for periods of sea-level rises 2 and 5 thousand years ago. Bottom sediments in the depocenter contain 45% of organic matter primary produced in the Obskaya Guba. This organic matter is an energetic basis for bottom fauna life. About 55% of organic matter comes with river run-off. |
| title | Radiocarbon age and sedimentation rates of bottom sediments in the Obskaya Gube (Ob River estuary |
| topic | Archive of Ocean Data; ARCOD; DM49; DM49-4397-2; DM49-4414-1; DM49-4415-1; DM49-4416-1; DM49-4417-1; Dmitry Mendeleev; GC; Gravity corer; Kara Sea; SPASIBAIII |
| url | https://doi.org/10.1594/PANGAEA.761919 |