Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice
© Author(s) 2015. Lake Vida, located in Victoria Valley, is one of the largest lakes in the McMurdo dry valleys and is known to contain hypersaline liquid brine sealed below 16 m of freshwater ice. For the first time, Lake Vida was drilled to a depth of 27 m. Below 21 m the ice is marked by well-sor...
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ftlouisianastuir:oai:digitalcommons.lsu.edu:geo_pubs-1608 2023-06-11T04:06:22+02:00 Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice Dugan, H. A. Doran, P. T. Wagner, B. Kenig, F. Fritsen, C. H. Arcone, S. A. Kuhn, E. Ostrom, N. E. Warnock, J. P. Murray, A. E. 2015-03-04T08:00:00Z application/pdf https://digitalcommons.lsu.edu/geo_pubs/609 https://doi.org/10.5194/tc-9-439-2015 https://digitalcommons.lsu.edu/context/geo_pubs/article/1608/viewcontent/609.pdf unknown LSU Digital Commons https://digitalcommons.lsu.edu/geo_pubs/609 doi:10.5194/tc-9-439-2015 https://digitalcommons.lsu.edu/context/geo_pubs/article/1608/viewcontent/609.pdf Faculty Publications text 2015 ftlouisianastuir https://doi.org/10.5194/tc-9-439-2015 2023-05-28T18:24:40Z © Author(s) 2015. Lake Vida, located in Victoria Valley, is one of the largest lakes in the McMurdo dry valleys and is known to contain hypersaline liquid brine sealed below 16 m of freshwater ice. For the first time, Lake Vida was drilled to a depth of 27 m. Below 21 m the ice is marked by well-sorted sand layers up to 20 cm thick within a matrix of salty ice. From ice chemistry, isotopic composition of δ18O and δ2H, and ground penetrating radar profiles, we conclude that the entire 27 m of ice formed from surface runoff and the sediment layers represent the accumulation of surface deposits. Radiocarbon and optically stimulated luminescence dating limit the maximum age of the lower ice to 6300 14C yr BP. As the ice cover ablated downwards during periods of low surface inflow, progressive accumulation of sediment layers insulated and preserved the ice and brine beneath, analogous to the processes that preserve shallow ground ice. The repetition of these sediment layers reveals hydrologic variability in Victoria Valley during the mid- to late Holocene. Lake Vida is an exemplar site for understanding the preservation of subsurface brine, ice, and sediment in a cold desert environment. Text Antarc* Antarctica McMurdo Dry Valleys LSU Digital Commons (Louisiana State University) Lake Vida ENVELOPE(161.950,161.950,-77.383,-77.383) McMurdo Dry Valleys Victoria Valley ENVELOPE(162.000,162.000,-77.383,-77.383) The Cryosphere 9 2 439 450 |
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LSU Digital Commons (Louisiana State University) |
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© Author(s) 2015. Lake Vida, located in Victoria Valley, is one of the largest lakes in the McMurdo dry valleys and is known to contain hypersaline liquid brine sealed below 16 m of freshwater ice. For the first time, Lake Vida was drilled to a depth of 27 m. Below 21 m the ice is marked by well-sorted sand layers up to 20 cm thick within a matrix of salty ice. From ice chemistry, isotopic composition of δ18O and δ2H, and ground penetrating radar profiles, we conclude that the entire 27 m of ice formed from surface runoff and the sediment layers represent the accumulation of surface deposits. Radiocarbon and optically stimulated luminescence dating limit the maximum age of the lower ice to 6300 14C yr BP. As the ice cover ablated downwards during periods of low surface inflow, progressive accumulation of sediment layers insulated and preserved the ice and brine beneath, analogous to the processes that preserve shallow ground ice. The repetition of these sediment layers reveals hydrologic variability in Victoria Valley during the mid- to late Holocene. Lake Vida is an exemplar site for understanding the preservation of subsurface brine, ice, and sediment in a cold desert environment. |
format |
Text |
author |
Dugan, H. A. Doran, P. T. Wagner, B. Kenig, F. Fritsen, C. H. Arcone, S. A. Kuhn, E. Ostrom, N. E. Warnock, J. P. Murray, A. E. |
spellingShingle |
Dugan, H. A. Doran, P. T. Wagner, B. Kenig, F. Fritsen, C. H. Arcone, S. A. Kuhn, E. Ostrom, N. E. Warnock, J. P. Murray, A. E. Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
author_facet |
Dugan, H. A. Doran, P. T. Wagner, B. Kenig, F. Fritsen, C. H. Arcone, S. A. Kuhn, E. Ostrom, N. E. Warnock, J. P. Murray, A. E. |
author_sort |
Dugan, H. A. |
title |
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
title_short |
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
title_full |
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
title_fullStr |
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
title_full_unstemmed |
Stratigraphy of Lake Vida, Antarctica: Hydrologic implications of 27 m of ice |
title_sort |
stratigraphy of lake vida, antarctica: hydrologic implications of 27 m of ice |
publisher |
LSU Digital Commons |
publishDate |
2015 |
url |
https://digitalcommons.lsu.edu/geo_pubs/609 https://doi.org/10.5194/tc-9-439-2015 https://digitalcommons.lsu.edu/context/geo_pubs/article/1608/viewcontent/609.pdf |
long_lat |
ENVELOPE(161.950,161.950,-77.383,-77.383) ENVELOPE(162.000,162.000,-77.383,-77.383) |
geographic |
Lake Vida McMurdo Dry Valleys Victoria Valley |
geographic_facet |
Lake Vida McMurdo Dry Valleys Victoria Valley |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.lsu.edu/geo_pubs/609 doi:10.5194/tc-9-439-2015 https://digitalcommons.lsu.edu/context/geo_pubs/article/1608/viewcontent/609.pdf |
op_doi |
https://doi.org/10.5194/tc-9-439-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
2 |
container_start_page |
439 |
op_container_end_page |
450 |
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1768378275444293632 |