Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development
Abstract Ice streams are sites of ice-sheet drainage and together with other processes, such as calving, have an impact on deglaciation rates and ice-sheet mass balance. Proglacial lake deposits provide records of ice-sheet deglaciation and have the potential to supplement other paleoclimate records...
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Online Access: | http://dx.doi.org/10.1017/jog.2022.72 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000727 |
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crcambridgeupr:10.1017/jog.2022.72 2024-03-03T08:45:24+00:00 Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development Zaremba, Nicholas J. Scholz, Christopher A. Moucha, Robert National Science Foundation 2022 http://dx.doi.org/10.1017/jog.2022.72 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000727 en eng Cambridge University Press (CUP) https://creativecommons.org/licenses/by-nc-sa/4.0/ Journal of Glaciology volume 69, issue 275, page 445-458 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2022 crcambridgeupr https://doi.org/10.1017/jog.2022.72 2024-02-08T08:37:06Z Abstract Ice streams are sites of ice-sheet drainage and together with other processes, such as calving, have an impact on deglaciation rates and ice-sheet mass balance. Proglacial lake deposits provide records of ice-sheet deglaciation and have the potential to supplement other paleoclimate records. Oneida Lake, northeastern USA, contains a thick proglacial lake sequence that buries evidence of ice streaming and a paleo-calving margin that developed during retreat of the Laurentide Ice Sheet. Previous high-resolution digital elevation models identified the Oneida Ice Stream from glacial landforms northwest of the lake. In this study, we utilize seismic refractions from a multichannel seismic (MCS) reflection dataset to estimate the thickness of glacial deposits using seismic tomography. With this method we constrain the depth to top of Paleozoic strata, especially in areas where the reflection data yielded poor outcomes and validate our reflection data in regions of good coverage. We demonstrate that where long offset seismic data are available, the first-arrival tomography method is useful in studies of formerly glaciated basins. Our study identifies a ~108 m thick sedimentary section and potentially long paleoclimate record in Oneida Lake, and identifies a paleotopographic low that likely encouraged formation of the Oneida Ice Stream. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 1 14 |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
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Earth-Surface Processes Zaremba, Nicholas J. Scholz, Christopher A. Moucha, Robert Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
topic_facet |
Earth-Surface Processes |
description |
Abstract Ice streams are sites of ice-sheet drainage and together with other processes, such as calving, have an impact on deglaciation rates and ice-sheet mass balance. Proglacial lake deposits provide records of ice-sheet deglaciation and have the potential to supplement other paleoclimate records. Oneida Lake, northeastern USA, contains a thick proglacial lake sequence that buries evidence of ice streaming and a paleo-calving margin that developed during retreat of the Laurentide Ice Sheet. Previous high-resolution digital elevation models identified the Oneida Ice Stream from glacial landforms northwest of the lake. In this study, we utilize seismic refractions from a multichannel seismic (MCS) reflection dataset to estimate the thickness of glacial deposits using seismic tomography. With this method we constrain the depth to top of Paleozoic strata, especially in areas where the reflection data yielded poor outcomes and validate our reflection data in regions of good coverage. We demonstrate that where long offset seismic data are available, the first-arrival tomography method is useful in studies of formerly glaciated basins. Our study identifies a ~108 m thick sedimentary section and potentially long paleoclimate record in Oneida Lake, and identifies a paleotopographic low that likely encouraged formation of the Oneida Ice Stream. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Zaremba, Nicholas J. Scholz, Christopher A. Moucha, Robert |
author_facet |
Zaremba, Nicholas J. Scholz, Christopher A. Moucha, Robert |
author_sort |
Zaremba, Nicholas J. |
title |
Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
title_short |
Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
title_full |
Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
title_fullStr |
Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
title_full_unstemmed |
Application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
title_sort |
application of first arrival seismic tomography in a glaciated basin: implications for paleo-ice stream development |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/jog.2022.72 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000727 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 69, issue 275, page 445-458 ISSN 0022-1430 1727-5652 |
op_rights |
https://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2022.72 |
container_title |
Journal of Glaciology |
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1 |
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14 |
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1792500947173244928 |