Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica
Up to 2.3 m long sediment sequences were recovered from the deepest part of Lake Hoare in Taylor Valley, southern Victoria Land, Antarctica. Sedimentological, biogeochemical, and mineralogical analyses revealed a high spatial variability of these parameters in Lake Hoare. Five distinct lithological...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.798405 2024-09-15T17:42:52+00:00 Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica Wagner, Bernd Ortlepp, Sabrina Doran, Peter T Kenig, Fabien Melles, Martin Burkemper, Andy LATITUDE: -77.628760 * LONGITUDE: 162.882230 * DATE/TIME START: 2003-01-01T00:00:00 * DATE/TIME END: 2003-01-01T00:00:00 2012 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.798405 https://doi.org/10.1594/PANGAEA.798405 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.798405 https://doi.org/10.1594/PANGAEA.798405 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Wagner, Bernd; Ortlepp, Sabrina; Doran, Peter T; Kenig, Fabien; Melles, Martin; Burkemper, Andy (2011): The Holocene environmental history of Lake Hoare, Taylor Valley, Antarctica, reconstructed from sediment cores. Antarctic Science, 23(3), 307-319, https://doi.org/10.1017/S0954102011000125 COMPCORE Composite Core Lake Hoare Taylor Valley East Antarctica Lz1020 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling in lake SPP1158 TaylorValley2002 dataset publication series 2012 ftpangaea https://doi.org/10.1594/PANGAEA.79840510.1017/S0954102011000125 2024-07-24T02:31:21Z Up to 2.3 m long sediment sequences were recovered from the deepest part of Lake Hoare in Taylor Valley, southern Victoria Land, Antarctica. Sedimentological, biogeochemical, and mineralogical analyses revealed a high spatial variability of these parameters in Lake Hoare. Five distinct lithological units were recognized. Radiocarbon dating of bulk organic carbon samples from the sediment sequences yielded apparently too old ages and significant age reversals, which prevented the establishment of reliable age-depth models. However, cross correlation of the sedimentary characteristics with those of sediment records from neighbouring Lake Fryxell indicates that the lowermost two units of the Lake Hoare sediment sequences were probably deposited during the final phase of proglacial Lake Washburn, which occupied Taylor Valley during the late Pleistocene and early Holocene. High amounts of angular gravel and the absence of fine-grained material imply a complete desiccation with subaerial conditions in the Lake Hoare basin in the middle of the Holocene. The late Holocene (< c. 3300 calendar yr BP) is characterized by the establishment of environmental conditions similar to those existing today. A late Holocene desiccation event, such as proposed in former studies, is not indicated in the sediment sequences recovered. Other/Unknown Material Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Victoria Land PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(162.882230,162.882230,-77.628760,-77.628760) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
COMPCORE Composite Core Lake Hoare Taylor Valley East Antarctica Lz1020 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling in lake SPP1158 TaylorValley2002 |
spellingShingle |
COMPCORE Composite Core Lake Hoare Taylor Valley East Antarctica Lz1020 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling in lake SPP1158 TaylorValley2002 Wagner, Bernd Ortlepp, Sabrina Doran, Peter T Kenig, Fabien Melles, Martin Burkemper, Andy Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
topic_facet |
COMPCORE Composite Core Lake Hoare Taylor Valley East Antarctica Lz1020 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Sampling/drilling in lake SPP1158 TaylorValley2002 |
description |
Up to 2.3 m long sediment sequences were recovered from the deepest part of Lake Hoare in Taylor Valley, southern Victoria Land, Antarctica. Sedimentological, biogeochemical, and mineralogical analyses revealed a high spatial variability of these parameters in Lake Hoare. Five distinct lithological units were recognized. Radiocarbon dating of bulk organic carbon samples from the sediment sequences yielded apparently too old ages and significant age reversals, which prevented the establishment of reliable age-depth models. However, cross correlation of the sedimentary characteristics with those of sediment records from neighbouring Lake Fryxell indicates that the lowermost two units of the Lake Hoare sediment sequences were probably deposited during the final phase of proglacial Lake Washburn, which occupied Taylor Valley during the late Pleistocene and early Holocene. High amounts of angular gravel and the absence of fine-grained material imply a complete desiccation with subaerial conditions in the Lake Hoare basin in the middle of the Holocene. The late Holocene (< c. 3300 calendar yr BP) is characterized by the establishment of environmental conditions similar to those existing today. A late Holocene desiccation event, such as proposed in former studies, is not indicated in the sediment sequences recovered. |
format |
Other/Unknown Material |
author |
Wagner, Bernd Ortlepp, Sabrina Doran, Peter T Kenig, Fabien Melles, Martin Burkemper, Andy |
author_facet |
Wagner, Bernd Ortlepp, Sabrina Doran, Peter T Kenig, Fabien Melles, Martin Burkemper, Andy |
author_sort |
Wagner, Bernd |
title |
Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
title_short |
Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
title_full |
Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
title_fullStr |
Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
title_full_unstemmed |
Age determination and sedimentology on profile Lz1020 from Lake Hoare, Antarctica |
title_sort |
age determination and sedimentology on profile lz1020 from lake hoare, antarctica |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.798405 https://doi.org/10.1594/PANGAEA.798405 |
op_coverage |
LATITUDE: -77.628760 * LONGITUDE: 162.882230 * DATE/TIME START: 2003-01-01T00:00:00 * DATE/TIME END: 2003-01-01T00:00:00 |
long_lat |
ENVELOPE(162.882230,162.882230,-77.628760,-77.628760) |
genre |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Victoria Land |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Sea ice Victoria Land |
op_source |
Supplement to: Wagner, Bernd; Ortlepp, Sabrina; Doran, Peter T; Kenig, Fabien; Melles, Martin; Burkemper, Andy (2011): The Holocene environmental history of Lake Hoare, Taylor Valley, Antarctica, reconstructed from sediment cores. Antarctic Science, 23(3), 307-319, https://doi.org/10.1017/S0954102011000125 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.798405 https://doi.org/10.1594/PANGAEA.798405 |
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.79840510.1017/S0954102011000125 |
_version_ |
1810489669412978688 |