On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica
An extensive grid of seismic reflection data collected on Ekström Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to reconstruct the glaciological and tectonic history of this region. The data clearly image the outcrop and sub-ice extent of...
Main Authors: | , , , , , , , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2018
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/47445/ https://epic.awi.de/id/eprint/47445/1/Smith_POLAR18_0736.pdf https://hdl.handle.net/10013/epic.b32b1d5b-05d1-42b1-9ff4-755cb53b3f5d https://hdl.handle.net/ |
id |
ftawi:oai:epic.awi.de:47445 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:47445 2023-05-15T13:45:21+02:00 On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica Smith, Emma Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf 2018-06-22 application/pdf https://epic.awi.de/id/eprint/47445/ https://epic.awi.de/id/eprint/47445/1/Smith_POLAR18_0736.pdf https://hdl.handle.net/10013/epic.b32b1d5b-05d1-42b1-9ff4-755cb53b3f5d https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/47445/1/Smith_POLAR18_0736.pdf https://hdl.handle.net/ Smith, E. orcid:0000-0002-8672-8259 , Drews, R. , Ehlers, T. , Franke, D. , Gaedicke, C. , Hofstede, C. orcid:0000-0002-6015-6918 , Kuhn, G. orcid:0000-0001-6069-7485 , Lambrecht, A. , Mayer, C. , Tiedemann, R. orcid:0000-0001-7211-8049 and Eisen, O. orcid:0000-0002-6380-962X (2018) On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica , POLAR 2018 (SCAR and IASC Conference), Davos, Switzerland, 19 June 2018 - 23 June 2018 . hdl:10013/epic.b32b1d5b-05d1-42b1-9ff4-755cb53b3f5d EPIC3POLAR 2018 (SCAR and IASC Conference), Davos, Switzerland, 2018-06-19-2018-06-23 Conference notRev 2018 ftawi 2021-12-24T15:43:57Z An extensive grid of seismic reflection data collected on Ekström Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to reconstruct the glaciological and tectonic history of this region. The data clearly image the outcrop and sub-ice extent of the volcanic Explora Wedge (generated through Jurassic rifting and seafloor spreading). The wedge is overlain by a sequence of truncated, dipping marine-sediment layers. The sediment were likely truncated by former ice advance and subsequent retreat; which has also left evidence in the form topographic over-deepening and glacial debris deposits at the sea floor. The debris deposits range from elongated bedforms in a topographic trough (indicating probable former ice-stream flow) to layered sediment wedges at the current ice-shelf front (indicating the likely former extent of grounded ice). A series of sub-ice shelf geological drilling campaigns in the area will take place (2017-2019) to recover sediments from the sea floor. Combining the topography and material characteristics from vibroseis data with stratigraphic evidence from sediment cores allows a robust reconstruction in this area. Future integration of these results with numerical models will provide a better understanding of past and present interactions between the ice sheet and the solid Earth in Dronning Maud Land, which will in turn improve understanding of future contributions of this region to sea-level rise. Conference Object Antarc* Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Dronning Maud Land East Antarctica |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
An extensive grid of seismic reflection data collected on Ekström Ice Shelf, East Antarctica, between 2010–2018, using an on-ice vibroseis source and snowstreamer, are used to reconstruct the glaciological and tectonic history of this region. The data clearly image the outcrop and sub-ice extent of the volcanic Explora Wedge (generated through Jurassic rifting and seafloor spreading). The wedge is overlain by a sequence of truncated, dipping marine-sediment layers. The sediment were likely truncated by former ice advance and subsequent retreat; which has also left evidence in the form topographic over-deepening and glacial debris deposits at the sea floor. The debris deposits range from elongated bedforms in a topographic trough (indicating probable former ice-stream flow) to layered sediment wedges at the current ice-shelf front (indicating the likely former extent of grounded ice). A series of sub-ice shelf geological drilling campaigns in the area will take place (2017-2019) to recover sediments from the sea floor. Combining the topography and material characteristics from vibroseis data with stratigraphic evidence from sediment cores allows a robust reconstruction in this area. Future integration of these results with numerical models will provide a better understanding of past and present interactions between the ice sheet and the solid Earth in Dronning Maud Land, which will in turn improve understanding of future contributions of this region to sea-level rise. |
format |
Conference Object |
author |
Smith, Emma Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf |
spellingShingle |
Smith, Emma Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
author_facet |
Smith, Emma Drews, Reinhard Ehlers, Todd Franke, Dieter Gaedicke, Christoph Hofstede, Coen Kuhn, Gerhard Lambrecht, Astrid Mayer, Christoph Tiedemann, Ralf Eisen, Olaf |
author_sort |
Smith, Emma |
title |
On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
title_short |
On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
title_full |
On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
title_fullStr |
On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
title_full_unstemmed |
On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica |
title_sort |
on-ice vibroseis: sediment features below ekström ice shelf, east antarctica |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47445/ https://epic.awi.de/id/eprint/47445/1/Smith_POLAR18_0736.pdf https://hdl.handle.net/10013/epic.b32b1d5b-05d1-42b1-9ff4-755cb53b3f5d https://hdl.handle.net/ |
geographic |
Dronning Maud Land East Antarctica |
geographic_facet |
Dronning Maud Land East Antarctica |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf |
op_source |
EPIC3POLAR 2018 (SCAR and IASC Conference), Davos, Switzerland, 2018-06-19-2018-06-23 |
op_relation |
https://epic.awi.de/id/eprint/47445/1/Smith_POLAR18_0736.pdf https://hdl.handle.net/ Smith, E. orcid:0000-0002-8672-8259 , Drews, R. , Ehlers, T. , Franke, D. , Gaedicke, C. , Hofstede, C. orcid:0000-0002-6015-6918 , Kuhn, G. orcid:0000-0001-6069-7485 , Lambrecht, A. , Mayer, C. , Tiedemann, R. orcid:0000-0001-7211-8049 and Eisen, O. orcid:0000-0002-6380-962X (2018) On-ice vibroseis: Sediment features below Ekström Ice Shelf, East Antarctica , POLAR 2018 (SCAR and IASC Conference), Davos, Switzerland, 19 June 2018 - 23 June 2018 . hdl:10013/epic.b32b1d5b-05d1-42b1-9ff4-755cb53b3f5d |
_version_ |
1766221252802904064 |