Sedimentation and mineral analysis on sediment cores from the Lena Delta
Core and outcrop analysis from Lena mouth deposits have been used to reconstruct the Late Quaternary sedimentation history of the Lena Delta. Sediment properties (heavy mineral composition, grain size characteristics, organic carbon content) and age determinations (14C AMS and IR-OSL) are applied to...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.728539 https://doi.org/10.1594/PANGAEA.728539 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728539 2024-09-15T18:11:41+00:00 Sedimentation and mineral analysis on sediment cores from the Lena Delta Schwamborn, Georg Rachold, Volker Grigoriev, Mikhail N MEDIAN LATITUDE: 72.866583 * MEDIAN LONGITUDE: 125.116988 * SOUTH-BOUND LATITUDE: 72.345167 * WEST-BOUND LONGITUDE: 123.180833 * NORTH-BOUND LATITUDE: 73.326333 * EAST-BOUND LONGITUDE: 127.185167 * DATE/TIME START: 1998-08-01T00:00:00 * DATE/TIME END: 2000-05-08T00:00:00 2002 application/zip, 14 datasets https://doi.pangaea.de/10.1594/PANGAEA.728539 https://doi.org/10.1594/PANGAEA.728539 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728539 https://doi.org/10.1594/PANGAEA.728539 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Schwamborn, Georg; Rachold, Volker; Grigoriev, Mikhail N (2002): Late Quaternary Sedimentation History of the Lena Delta. Quaternary International, 89(1), 119-134, https://doi.org/10.1016/S1040-6182(01)00084-2 Arga Island AWI_PerDyn AWI Arctic Land Expedition ChekanovskyHighl HAND Laptev Sea System LD00-1316-1 LD00-1316-2 LD00-1316-3 LD98-D01 LD98-D06 LD98-D07 LD98-D08 LD98-D10 LD98-S04 LD98-S05 LD98-S06 Lena-Delta1998 Lena-Delta1999 Lena-Delta2000 LSS minerals Nikolay Lake Lena Delta Russia Olenyok Channel PERM Permafrost Research (Periglacial Dynamics) @ AWI PG1440 radiocarbon RCD river delta Rotary core drilling RU-Land_1998_Lena RU-Land_1999_Lena RU-Land_2000_Lena Samoylov Island Siberia Sampling by hand Sampling permafrost Sardakh Channel Sediment core sediments Seismic shallow profile SEISS dataset publication series 2002 ftpangaea https://doi.org/10.1594/PANGAEA.72853910.1016/S1040-6182(01)00084-2 2024-07-24T02:31:20Z Core and outcrop analysis from Lena mouth deposits have been used to reconstruct the Late Quaternary sedimentation history of the Lena Delta. Sediment properties (heavy mineral composition, grain size characteristics, organic carbon content) and age determinations (14C AMS and IR-OSL) are applied to discriminate the main sedimentary units of the three major geomorphic terraces, which form the delta. The development of the terraces is controlled by complex interactions among the following four factors: (1) Channel migration. According to the distribution of 14C and IR-OSL age determinations of Lena mouth sediments, the major river runoff direction shifted from the west during marine isotope stages 5-3 (third terrace deposits) towards the northwest during marine isotope stage 2 and transition to stage 1 (second terrace), to the northeast and east during the Holocene (first terrace deposits). (2) Eustasy. Sea level rise from Last Glacial lowstand to the modern sea level position, reached at 6-5 ka BP, resulted in back-filling and flooding of the palaeovalleys. (3) Neotectonics. The extension of the Arctic Mid-Ocean Ridge into the Laptev Sea shelf acted as a halfgraben, showing dilatation movements with different subsidence rates. From the continent side, differential neotectonics with uplift and transpression in the Siberian coast ridges are active. Both likely have influenced river behavior by providing sites for preservation, with uplift, in particular, allowing accumulation of deposits in the second terrace in the western sector. The actual delta setting comprises only the eastern sector of the Lena Delta. (4) Peat formation. Polygenetic formation of ice-rich peaty sand (''Ice Complex'') was most extensive (7-11 m in thickness) in the southern part of the delta area between 43 and 14 ka BP (third terrace deposits). In recent times, alluvial peat (5-6 m in thickness) is accumulated on top of the deltaic sequences in the eastern sector (first terrace). Other/Unknown Material Ice laptev Laptev Sea lena delta permafrost Siberia PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(123.180833,127.185167,73.326333,72.345167) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Arga Island AWI_PerDyn AWI Arctic Land Expedition ChekanovskyHighl HAND Laptev Sea System LD00-1316-1 LD00-1316-2 LD00-1316-3 LD98-D01 LD98-D06 LD98-D07 LD98-D08 LD98-D10 LD98-S04 LD98-S05 LD98-S06 Lena-Delta1998 Lena-Delta1999 Lena-Delta2000 LSS minerals Nikolay Lake Lena Delta Russia Olenyok Channel PERM Permafrost Research (Periglacial Dynamics) @ AWI PG1440 radiocarbon RCD river delta Rotary core drilling RU-Land_1998_Lena RU-Land_1999_Lena RU-Land_2000_Lena Samoylov Island Siberia Sampling by hand Sampling permafrost Sardakh Channel Sediment core sediments Seismic shallow profile SEISS |
spellingShingle |
Arga Island AWI_PerDyn AWI Arctic Land Expedition ChekanovskyHighl HAND Laptev Sea System LD00-1316-1 LD00-1316-2 LD00-1316-3 LD98-D01 LD98-D06 LD98-D07 LD98-D08 LD98-D10 LD98-S04 LD98-S05 LD98-S06 Lena-Delta1998 Lena-Delta1999 Lena-Delta2000 LSS minerals Nikolay Lake Lena Delta Russia Olenyok Channel PERM Permafrost Research (Periglacial Dynamics) @ AWI PG1440 radiocarbon RCD river delta Rotary core drilling RU-Land_1998_Lena RU-Land_1999_Lena RU-Land_2000_Lena Samoylov Island Siberia Sampling by hand Sampling permafrost Sardakh Channel Sediment core sediments Seismic shallow profile SEISS Schwamborn, Georg Rachold, Volker Grigoriev, Mikhail N Sedimentation and mineral analysis on sediment cores from the Lena Delta |
topic_facet |
Arga Island AWI_PerDyn AWI Arctic Land Expedition ChekanovskyHighl HAND Laptev Sea System LD00-1316-1 LD00-1316-2 LD00-1316-3 LD98-D01 LD98-D06 LD98-D07 LD98-D08 LD98-D10 LD98-S04 LD98-S05 LD98-S06 Lena-Delta1998 Lena-Delta1999 Lena-Delta2000 LSS minerals Nikolay Lake Lena Delta Russia Olenyok Channel PERM Permafrost Research (Periglacial Dynamics) @ AWI PG1440 radiocarbon RCD river delta Rotary core drilling RU-Land_1998_Lena RU-Land_1999_Lena RU-Land_2000_Lena Samoylov Island Siberia Sampling by hand Sampling permafrost Sardakh Channel Sediment core sediments Seismic shallow profile SEISS |
description |
Core and outcrop analysis from Lena mouth deposits have been used to reconstruct the Late Quaternary sedimentation history of the Lena Delta. Sediment properties (heavy mineral composition, grain size characteristics, organic carbon content) and age determinations (14C AMS and IR-OSL) are applied to discriminate the main sedimentary units of the three major geomorphic terraces, which form the delta. The development of the terraces is controlled by complex interactions among the following four factors: (1) Channel migration. According to the distribution of 14C and IR-OSL age determinations of Lena mouth sediments, the major river runoff direction shifted from the west during marine isotope stages 5-3 (third terrace deposits) towards the northwest during marine isotope stage 2 and transition to stage 1 (second terrace), to the northeast and east during the Holocene (first terrace deposits). (2) Eustasy. Sea level rise from Last Glacial lowstand to the modern sea level position, reached at 6-5 ka BP, resulted in back-filling and flooding of the palaeovalleys. (3) Neotectonics. The extension of the Arctic Mid-Ocean Ridge into the Laptev Sea shelf acted as a halfgraben, showing dilatation movements with different subsidence rates. From the continent side, differential neotectonics with uplift and transpression in the Siberian coast ridges are active. Both likely have influenced river behavior by providing sites for preservation, with uplift, in particular, allowing accumulation of deposits in the second terrace in the western sector. The actual delta setting comprises only the eastern sector of the Lena Delta. (4) Peat formation. Polygenetic formation of ice-rich peaty sand (''Ice Complex'') was most extensive (7-11 m in thickness) in the southern part of the delta area between 43 and 14 ka BP (third terrace deposits). In recent times, alluvial peat (5-6 m in thickness) is accumulated on top of the deltaic sequences in the eastern sector (first terrace). |
format |
Other/Unknown Material |
author |
Schwamborn, Georg Rachold, Volker Grigoriev, Mikhail N |
author_facet |
Schwamborn, Georg Rachold, Volker Grigoriev, Mikhail N |
author_sort |
Schwamborn, Georg |
title |
Sedimentation and mineral analysis on sediment cores from the Lena Delta |
title_short |
Sedimentation and mineral analysis on sediment cores from the Lena Delta |
title_full |
Sedimentation and mineral analysis on sediment cores from the Lena Delta |
title_fullStr |
Sedimentation and mineral analysis on sediment cores from the Lena Delta |
title_full_unstemmed |
Sedimentation and mineral analysis on sediment cores from the Lena Delta |
title_sort |
sedimentation and mineral analysis on sediment cores from the lena delta |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728539 https://doi.org/10.1594/PANGAEA.728539 |
op_coverage |
MEDIAN LATITUDE: 72.866583 * MEDIAN LONGITUDE: 125.116988 * SOUTH-BOUND LATITUDE: 72.345167 * WEST-BOUND LONGITUDE: 123.180833 * NORTH-BOUND LATITUDE: 73.326333 * EAST-BOUND LONGITUDE: 127.185167 * DATE/TIME START: 1998-08-01T00:00:00 * DATE/TIME END: 2000-05-08T00:00:00 |
long_lat |
ENVELOPE(123.180833,127.185167,73.326333,72.345167) |
genre |
Ice laptev Laptev Sea lena delta permafrost Siberia |
genre_facet |
Ice laptev Laptev Sea lena delta permafrost Siberia |
op_source |
Supplement to: Schwamborn, Georg; Rachold, Volker; Grigoriev, Mikhail N (2002): Late Quaternary Sedimentation History of the Lena Delta. Quaternary International, 89(1), 119-134, https://doi.org/10.1016/S1040-6182(01)00084-2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728539 https://doi.org/10.1594/PANGAEA.728539 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72853910.1016/S1040-6182(01)00084-2 |
_version_ |
1810449259913281536 |