Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona
Sediments of Lake Donggi Cona on the northeastern Tibetan Plateau were studied to infer changes in the lacustrine depositional environment, related to climatic and non-climatic changes during the last 19 kyr. The lake today fills a 30 X 8 km big and 95 m deep tectonic basin, associated with the Kunl...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.787780 2024-09-15T18:30:15+00:00 Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona Opitz, Stephan Wünnemann, Bernd Aichner, Bernhard Dietze, Elisabeth Hartmann, Kai Herzschuh, Ulrike IJmker, Janneke Lehmkuhl, Frank Li, Shijie Mischke, Steffen Plotzki, Anna Stauch, Georg Diekmann, Bernhard MEDIAN LATITUDE: 35.291824 * MEDIAN LONGITUDE: 98.521979 * SOUTH-BOUND LATITUDE: 35.253910 * WEST-BOUND LONGITUDE: 98.436500 * NORTH-BOUND LATITUDE: 35.345000 * EAST-BOUND LONGITUDE: 98.602740 * DATE/TIME START: 2006-08-28T00:00:00 * DATE/TIME END: 2008-03-12T00:00:00 2012 application/zip, 29 datasets https://doi.pangaea.de/10.1594/PANGAEA.787780 https://doi.org/10.1594/PANGAEA.787780 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.787780 https://doi.org/10.1594/PANGAEA.787780 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Opitz, Stephan; Wünnemann, Bernd; Aichner, Bernhard; Dietze, Elisabeth; Hartmann, Kai; Herzschuh, Ulrike; IJmker, Janneke; Lehmkuhl, Frank; Li, Shijie; Mischke, Steffen; Plotzki, Anna; Stauch, Georg; Diekmann, Bernhard (2012): Late Glacial and Holocene development of Lake Donggi Cona, north-eastern Tibetan Plateau, inferred from sedimentological analysis. Palaeogeography, Palaeoclimatology, Palaeoecology, 337-338, 159-176, https://doi.org/10.1016/j.palaeo.2012.04.013 AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.78778010.1016/j.palaeo.2012.04.013 2024-07-24T02:31:21Z Sediments of Lake Donggi Cona on the northeastern Tibetan Plateau were studied to infer changes in the lacustrine depositional environment, related to climatic and non-climatic changes during the last 19 kyr. The lake today fills a 30 X 8 km big and 95 m deep tectonic basin, associated with the Kunlun Fault. The study was conducted on a sediment-core transect through the lake basin, in order to gain a complete picture of spatiotemporal environmental change. The recovered sediments are partly finely laminated and are composed of calcareous muds with variable amounts of carbonate micrite, organic matter, detrital silt and clay. On the basis of sedimentological, geochemical, and mineralogical data up to five lithological units (LU) can be distinguished that document distinct stages in the development of the lake system. The onset of the lowermost LU with lacustrine muds above basal sands indicates that lake level was at least 39 m below the present level and started to rise after 19 ka, possibly in response to regional deglaciation. At this time, the lacustrine environment was characterized by detrital sediment influx and the deposition of siliciclastic sediment. In two sediment cores, upward grain-size coarsening documents a lake-level fall after 13 cal ka BP, possibly associated with the late-glacial Younger Dryas stadial. From 11.5 to 4.3 cal ka BP, grainsize fining in sediment cores from the profundal coring sites and the onset of lacustrine deposition at a litoral core site (2m water depth) in a recent marginal bay of Donggi Cona document lake-level rise during the early tomid-Holocene to at least modern level. In addition, high biological productivity and pronounced precipitation of carbonate micrites are consistent with warm and moist climate conditions related to an enhanced influence of summer monsoon. At 4.3 cal ka BP the lake system shifted from an aragonite- to a calcite-dominated system, indicating a change towards a fully open hydrological lake system. The younger clay-rich sediments are moreover ... Other/Unknown Material permafrost PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(98.436500,98.602740,35.345000,35.253910) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
spellingShingle |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI Opitz, Stephan Wünnemann, Bernd Aichner, Bernhard Dietze, Elisabeth Hartmann, Kai Herzschuh, Ulrike IJmker, Janneke Lehmkuhl, Frank Li, Shijie Mischke, Steffen Plotzki, Anna Stauch, Georg Diekmann, Bernhard Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
topic_facet |
AWI_PerDyn Permafrost Research (Periglacial Dynamics) @ AWI |
description |
Sediments of Lake Donggi Cona on the northeastern Tibetan Plateau were studied to infer changes in the lacustrine depositional environment, related to climatic and non-climatic changes during the last 19 kyr. The lake today fills a 30 X 8 km big and 95 m deep tectonic basin, associated with the Kunlun Fault. The study was conducted on a sediment-core transect through the lake basin, in order to gain a complete picture of spatiotemporal environmental change. The recovered sediments are partly finely laminated and are composed of calcareous muds with variable amounts of carbonate micrite, organic matter, detrital silt and clay. On the basis of sedimentological, geochemical, and mineralogical data up to five lithological units (LU) can be distinguished that document distinct stages in the development of the lake system. The onset of the lowermost LU with lacustrine muds above basal sands indicates that lake level was at least 39 m below the present level and started to rise after 19 ka, possibly in response to regional deglaciation. At this time, the lacustrine environment was characterized by detrital sediment influx and the deposition of siliciclastic sediment. In two sediment cores, upward grain-size coarsening documents a lake-level fall after 13 cal ka BP, possibly associated with the late-glacial Younger Dryas stadial. From 11.5 to 4.3 cal ka BP, grainsize fining in sediment cores from the profundal coring sites and the onset of lacustrine deposition at a litoral core site (2m water depth) in a recent marginal bay of Donggi Cona document lake-level rise during the early tomid-Holocene to at least modern level. In addition, high biological productivity and pronounced precipitation of carbonate micrites are consistent with warm and moist climate conditions related to an enhanced influence of summer monsoon. At 4.3 cal ka BP the lake system shifted from an aragonite- to a calcite-dominated system, indicating a change towards a fully open hydrological lake system. The younger clay-rich sediments are moreover ... |
format |
Other/Unknown Material |
author |
Opitz, Stephan Wünnemann, Bernd Aichner, Bernhard Dietze, Elisabeth Hartmann, Kai Herzschuh, Ulrike IJmker, Janneke Lehmkuhl, Frank Li, Shijie Mischke, Steffen Plotzki, Anna Stauch, Georg Diekmann, Bernhard |
author_facet |
Opitz, Stephan Wünnemann, Bernd Aichner, Bernhard Dietze, Elisabeth Hartmann, Kai Herzschuh, Ulrike IJmker, Janneke Lehmkuhl, Frank Li, Shijie Mischke, Steffen Plotzki, Anna Stauch, Georg Diekmann, Bernhard |
author_sort |
Opitz, Stephan |
title |
Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
title_short |
Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
title_full |
Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
title_fullStr |
Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
title_full_unstemmed |
Mineralogical and geochemical data from five lake sediment cores of Lake Donggi Cona |
title_sort |
mineralogical and geochemical data from five lake sediment cores of lake donggi cona |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.787780 https://doi.org/10.1594/PANGAEA.787780 |
op_coverage |
MEDIAN LATITUDE: 35.291824 * MEDIAN LONGITUDE: 98.521979 * SOUTH-BOUND LATITUDE: 35.253910 * WEST-BOUND LONGITUDE: 98.436500 * NORTH-BOUND LATITUDE: 35.345000 * EAST-BOUND LONGITUDE: 98.602740 * DATE/TIME START: 2006-08-28T00:00:00 * DATE/TIME END: 2008-03-12T00:00:00 |
long_lat |
ENVELOPE(98.436500,98.602740,35.345000,35.253910) |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Supplement to: Opitz, Stephan; Wünnemann, Bernd; Aichner, Bernhard; Dietze, Elisabeth; Hartmann, Kai; Herzschuh, Ulrike; IJmker, Janneke; Lehmkuhl, Frank; Li, Shijie; Mischke, Steffen; Plotzki, Anna; Stauch, Georg; Diekmann, Bernhard (2012): Late Glacial and Holocene development of Lake Donggi Cona, north-eastern Tibetan Plateau, inferred from sedimentological analysis. Palaeogeography, Palaeoclimatology, Palaeoecology, 337-338, 159-176, https://doi.org/10.1016/j.palaeo.2012.04.013 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.787780 https://doi.org/10.1594/PANGAEA.787780 |
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.78778010.1016/j.palaeo.2012.04.013 |
_version_ |
1810471711608406016 |