Winterfeld, Maria; Schirrmeister, Lutz; Grigoriev, Mikhail N; Kunitsky, Victor V; Andreev, Andrei A; Murray, Andrew Sean; Overduin, Pier Paul (2011): (Table 1) Radiocarbon and OSL ages of sediment cores C1-C5 drilled during the COAST expedition to Cape Mamontov Klyk in April 2005 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.841929, Supplement to: Winterfeld, M et al. (2011): Coastal permafrost landscape development since the Late Pleistocene in the western Laptev Sea, Siberia. Boreas, 40(4), 697-713, https://doi.org/10.1111/j.1502-3885.2011.00203.x
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Abstract:
The palaeoenvironmental development of the western Laptev Sea is understood primarily from investigations of exposed cliffs and surface sediment cores from the shelf. In 2005, a core transect was drilled between the Taymyr Peninsula and the Lena Delta, an area that was part of the westernmost region of the non-glaciated Beringian landmass during the late Quaternary. The transect of five cores, one terrestrial and four marine, taken near Cape Mamontov Klyk reached 12 km offshore and 77 m below sea level. A multiproxy approach combined cryolithological, sedimentological, geochronological (14C-AMS, OSL on quartz, IR-OSL on feldspars) and palaeoecological (pollen, diatoms) methods. Our interpretation of the proxies focuses on landscape history and the transition of terrestrial into subsea permafrost. Marine interglacial deposits overlain by relict terrestrial permafrost within the same offshore core were encountered in the western Laptev Sea. Moreover, the marine interglacial deposits lay unexpectedly deep at 64 m below modern sea level 12 km from the current coastline, while no marine deposits were encountered onshore. This implies that the position of the Eemian coastline presumably was similar to today's. The landscape reconstruction suggests Eemian coastal lagoons and thermokarst lakes, followed by Early to Middle Weichselian fluvially dominated terrestrial deposition. During the Late Weichselian, this fluvial landscape was transformed into a poorly drained accumulation plain, characterized by widespread and broad ice-wedge polygons. Finally, the shelf plain was flooded by the sea during the Holocene, resulting in the inundation and degradation of terrestrial permafrost and its transformation into subsea permafrost.
Related to:
Schirrmeister, Lutz; Grosse, Guido; Kunitsky, Victor V; Magens, Diana; Meyer, Hanno; Dereviagin, Alexander Yu; Kuznetsova, Tatyana V; Andreev, Andrei A; Babiy, O; Kienast, Frank; Grigoriev, Mikhail N; Overduin, Pier Paul; Preusser, Frank (2008): Periglacial landscape evolution and environmental changes of Arctic lowland areas for the last 60 000 years (western Laptev Sea coast, Cape Mamontov Klyk). Polar Research, 27(2), 249-272, https://doi.org/10.1111/j.1751-8369.2008.00067.x
Schirrmeister, Lutz; Grosse, Guido; Kunitsky, Victor V; Magens, Diana; Meyer, Hanno; Dereviagin, Alexander Yu; Kuznetsova, Tatyana V; Andreev, Andrei A; Babiy, O; Kienast, Frank; Grigoriev, Mikhail N; Overduin, Pier Paul; Preusser, Frank (2008): Pollen record and age determinations of a profile at Cape Mamontov Klyk, Siberia [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.736029
Project(s):
Coverage:
Median Latitude: 73.629679 * Median Longitude: 117.161847 * South-bound Latitude: 73.605970 * West-bound Longitude: 117.125000 * North-bound Latitude: 73.710028 * East-bound Longitude: 117.177360
Date/Time Start: 2003-08-12T00:00:00 * Date/Time End: 2005-05-24T00:00:00
Minimum DEPTH, sediment/rock: 0.45 m * Maximum DEPTH, sediment/rock: 71.00 m
Event(s):
COAST_C-1 * Latitude: 73.605970 * Longitude: 117.177360 * Date/Time Start: 2005-04-12T00:00:00 * Date/Time End: 2005-04-14T00:00:00 * Elevation: 26.0 m * Recovery: 60.8 m * Location: Cape Mamontov Klyk * Campaign: RU-Land_2005_COAST (COAST_I) * Basis: AWI Arctic Land Expedition * Method/Device: Drilling/drill rig (DRILL) * Comment: Distance to coast: 0.1 km; Frost table depth: 0 m
COAST_C-2 * Latitude: 73.710028 * Longitude: 117.166972 * Date/Time Start: 2005-04-14T00:00:00 * Date/Time End: 2005-04-19T00:00:00 * Elevation: -6.0 m * Recovery: 77 m * Location: Cape Mamontov Klyk * Campaign: RU-Land_2005_COAST (COAST_I) * Basis: AWI Arctic Land Expedition * Method/Device: Drilling/drill rig (DRILL) * Comment: Distance to coast: 11.5 km; Ice thickness: 1.35 m; Bottom water salinity: 29.2 per mil; Bottom water temperature: -1.54 deg C; Frost table depth: 35 m
COAST_C-3 * Latitude: 73.632444 * Longitude: 117.167889 * Date/Time Start: 2005-04-21T00:00:00 * Date/Time End: 2005-04-22T00:00:00 * Elevation: -4.4 m * Recovery: 33.25 m * Location: Cape Mamontov Klyk * Campaign: RU-Land_2005_COAST (COAST_I) * Basis: AWI Arctic Land Expedition * Method/Device: Drilling/drill rig (DRILL) * Comment: Distance to coast: 3 km; Ice thickness: 1.85 m; Bottom water salinity: 30.0 per mil; Bottom water temperature: -1.61 deg C; Frost table depth: 12 m
Comment:
Depth, sediment/rock was obtained by substracting the given depth (m b.s.l.) by the height of the water body (sea level to sea bottom, see 'elevation'). For core C1, depth was given. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | ||||
2 | Latitude of event | Latitude | ||||
3 | Longitude of event | Longitude | ||||
4 | Elevation of event | Elevation | m | |||
5 | Lithologic unit/sequence | Unit | Winterfeld, Maria | |||
6 | Environmental feature | Env feature | Winterfeld, Maria | |||
7 | Sample code/label | Sample label | Winterfeld, Maria | |||
8 | Height above sea level | Height | m a.s.l. | Winterfeld, Maria | numbers for Schirrmeister et al. (2008) extracted from article | |
9 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
10 | Core | Core | Winterfeld, Maria | |||
11 | Age, dated | Age dated | ka BP | Winterfeld, Maria | Age, 14C AMS | # = to; ka BP |
12 | Age, dated, error to older | Age e + | ka + | Winterfeld, Maria | Age, 14C AMS | |
13 | Age, dated, error to younger | Age e - | ka - | Winterfeld, Maria | Age, 14C AMS | |
14 | Age, dated | Age dated | ka | Winterfeld, Maria | Age, optical stimulated luminescence (OSL) | |
15 | Age, dated standard deviation | Age dated std dev | ± | Winterfeld, Maria | Age, optical stimulated luminescence (OSL) | |
16 | Age, dated | Age dated | ka | Winterfeld, Maria | Age, infrared stimulated luminescence (IR-OSL) | |
17 | Age, dated standard deviation | Age dated std dev | ± | Winterfeld, Maria | Age, infrared stimulated luminescence (IR-OSL) | |
18 | Laboratory code/label | Lab label | Winterfeld, Maria | |||
19 | Reference/source | Reference | Winterfeld, Maria |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
201 data points