Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs)
During field seasons 2016/17 and 2017/18, pre-site seismic surveys were undertaken in the Ekströmisen region of Dronning Maud Land, with the primary goal of building a stratigraphic age framework of sub-ice-shelf sedimentary strata. These sediments cover the Explora Wedge, a syn- or post-rift volcan...
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ftawi:oai:epic.awi.de:49611 2023-05-15T13:45:21+02:00 Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) Kuhn, Gerhard Biskaborn, Boris K. Eisen, Olaf Gaedicke, Christoph Hattermann, Tore Hellmer, Hartmut Koglin, Nikola Klages, Johann Philipp Smith, Emma Tell, Jan Tiedemann, Ralf Wilhelms, Frank Fan, Xiapeng Talalay, Pavel G. 2018-04-12 application/pdf https://epic.awi.de/id/eprint/49611/ https://epic.awi.de/id/eprint/49611/1/EGU2018-16463.pdf https://hdl.handle.net/10013/epic.8f538b2a-557c-40ae-99d3-4e6b4eed1d83 https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/49611/1/EGU2018-16463.pdf https://hdl.handle.net/ Kuhn, G. orcid:0000-0001-6069-7485 , Biskaborn, B. K. orcid:0000-0003-2378-0348 , Eisen, O. orcid:0000-0002-6380-962X , Gaedicke, C. , Hattermann, T. , Hellmer, H. orcid:0000-0002-9357-9853 , Koglin, N. , Klages, J. P. orcid:0000-0003-0968-1183 , Smith, E. orcid:0000-0002-8672-8259 , Tell, J. , Tiedemann, R. orcid:0000-0001-7211-8049 , Wilhelms, F. orcid:0000-0001-7688-3135 , Fan, X. and Talalay, P. G. (2018) Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) , EGU General Assembly, Vienna, 8 April 2018 - 13 April 2018 . hdl:10013/epic.8f538b2a-557c-40ae-99d3-4e6b4eed1d83 EPIC3EGU General Assembly, Vienna, 2018-04-08-2018-04-13 Conference notRev 2018 ftawi 2021-12-24T15:44:42Z During field seasons 2016/17 and 2017/18, pre-site seismic surveys were undertaken in the Ekströmisen region of Dronning Maud Land, with the primary goal of building a stratigraphic age framework of sub-ice-shelf sedimentary strata. These sediments cover the Explora Wedge, a syn- or post-rift volcanic deposit. Expected ages range from Late Mesozoic to Quaternary. From new vibroseismic profiles, we selected sites for seafloor sampling with short cores through Hot Water Drill (HWD) holes of the oldest and of the youngest sedimentary sequencesto confine their age time span. There is further potential for drilling deeper sediment cores with the support of international partners. Deep drilling should recover the sediments overlying the Explora Escarpment, in order to discover the context and nature of the Explora Wedge. We expect the overlying sedimentary sequences to reveal the history of polar amplification and climate changes in this part of Antarctica, the build-up of the East AntarcticIce Sheet during past warmer climates and its Cenozoic and future variability. We successfully sampled the sea floor with different tools through HWD holes at two sites selected from the reflection seismic data close to the German Neumayer Station III, and discovered a pebbly sea floor coated with bryozoan skeletons. Present HWD holes penetrating the ice shelf to sample the sea floor will provide the unique opportunity for further piggy back experiments consisting of multi-disciplinary nature. For example, experiments and deploying measuring setup for oceanography, sea and ice shelf physics, geophysics, geology, hydrography, biogeochemistry could be potential future actions in order to characterise the ocean-ice-sediment interactions, processes and ecosystem observations. For season 2018/19 – besides additional geological sampling – it is planned to deploy a multiyear oceanographic mooring beneath the ice shelf. During future campaigns, we will try to launch an Autonomous Underwater Vehicle (AUV) either through a HWD hole, from a ship, or from the fast ice with the necessary power to operate and measure within the sub-ice shelf cavity. Conference Object Antarc* Antarctica Dronning Maud Land Ice Shelf Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Dronning Maud Land Neumayer Neumayer Station Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) Ekströmisen ENVELOPE(-8.000,-8.000,-71.000,-71.000) Explora Escarpment ENVELOPE(-15.000,-15.000,-70.550,-70.550) |
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 |
During field seasons 2016/17 and 2017/18, pre-site seismic surveys were undertaken in the Ekströmisen region of Dronning Maud Land, with the primary goal of building a stratigraphic age framework of sub-ice-shelf sedimentary strata. These sediments cover the Explora Wedge, a syn- or post-rift volcanic deposit. Expected ages range from Late Mesozoic to Quaternary. From new vibroseismic profiles, we selected sites for seafloor sampling with short cores through Hot Water Drill (HWD) holes of the oldest and of the youngest sedimentary sequencesto confine their age time span. There is further potential for drilling deeper sediment cores with the support of international partners. Deep drilling should recover the sediments overlying the Explora Escarpment, in order to discover the context and nature of the Explora Wedge. We expect the overlying sedimentary sequences to reveal the history of polar amplification and climate changes in this part of Antarctica, the build-up of the East AntarcticIce Sheet during past warmer climates and its Cenozoic and future variability. We successfully sampled the sea floor with different tools through HWD holes at two sites selected from the reflection seismic data close to the German Neumayer Station III, and discovered a pebbly sea floor coated with bryozoan skeletons. Present HWD holes penetrating the ice shelf to sample the sea floor will provide the unique opportunity for further piggy back experiments consisting of multi-disciplinary nature. For example, experiments and deploying measuring setup for oceanography, sea and ice shelf physics, geophysics, geology, hydrography, biogeochemistry could be potential future actions in order to characterise the ocean-ice-sediment interactions, processes and ecosystem observations. For season 2018/19 – besides additional geological sampling – it is planned to deploy a multiyear oceanographic mooring beneath the ice shelf. During future campaigns, we will try to launch an Autonomous Underwater Vehicle (AUV) either through a HWD hole, from a ship, or from the fast ice with the necessary power to operate and measure within the sub-ice shelf cavity. |
format |
Conference Object |
author |
Kuhn, Gerhard Biskaborn, Boris K. Eisen, Olaf Gaedicke, Christoph Hattermann, Tore Hellmer, Hartmut Koglin, Nikola Klages, Johann Philipp Smith, Emma Tell, Jan Tiedemann, Ralf Wilhelms, Frank Fan, Xiapeng Talalay, Pavel G. |
spellingShingle |
Kuhn, Gerhard Biskaborn, Boris K. Eisen, Olaf Gaedicke, Christoph Hattermann, Tore Hellmer, Hartmut Koglin, Nikola Klages, Johann Philipp Smith, Emma Tell, Jan Tiedemann, Ralf Wilhelms, Frank Fan, Xiapeng Talalay, Pavel G. Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
author_facet |
Kuhn, Gerhard Biskaborn, Boris K. Eisen, Olaf Gaedicke, Christoph Hattermann, Tore Hellmer, Hartmut Koglin, Nikola Klages, Johann Philipp Smith, Emma Tell, Jan Tiedemann, Ralf Wilhelms, Frank Fan, Xiapeng Talalay, Pavel G. |
author_sort |
Kuhn, Gerhard |
title |
Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
title_short |
Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
title_full |
Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
title_fullStr |
Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
title_full_unstemmed |
Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) |
title_sort |
preliminary results from pre-site surveys for deep geological drillingbelow ekström ice shelf (sub-eis-obs) |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/49611/ https://epic.awi.de/id/eprint/49611/1/EGU2018-16463.pdf https://hdl.handle.net/10013/epic.8f538b2a-557c-40ae-99d3-4e6b4eed1d83 https://hdl.handle.net/ |
long_lat |
ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(-15.000,-15.000,-70.550,-70.550) |
geographic |
Dronning Maud Land Neumayer Neumayer Station Ekström Ice Shelf Ekströmisen Explora Escarpment |
geographic_facet |
Dronning Maud Land Neumayer Neumayer Station Ekström Ice Shelf Ekströmisen Explora Escarpment |
genre |
Antarc* Antarctica Dronning Maud Land Ice Shelf |
genre_facet |
Antarc* Antarctica Dronning Maud Land Ice Shelf |
op_source |
EPIC3EGU General Assembly, Vienna, 2018-04-08-2018-04-13 |
op_relation |
https://epic.awi.de/id/eprint/49611/1/EGU2018-16463.pdf https://hdl.handle.net/ Kuhn, G. orcid:0000-0001-6069-7485 , Biskaborn, B. K. orcid:0000-0003-2378-0348 , Eisen, O. orcid:0000-0002-6380-962X , Gaedicke, C. , Hattermann, T. , Hellmer, H. orcid:0000-0002-9357-9853 , Koglin, N. , Klages, J. P. orcid:0000-0003-0968-1183 , Smith, E. orcid:0000-0002-8672-8259 , Tell, J. , Tiedemann, R. orcid:0000-0001-7211-8049 , Wilhelms, F. orcid:0000-0001-7688-3135 , Fan, X. and Talalay, P. G. (2018) Preliminary results from pre-site surveys for deep geological drillingbelow Ekström Ice Shelf (Sub-EIS-Obs) , EGU General Assembly, Vienna, 8 April 2018 - 13 April 2018 . hdl:10013/epic.8f538b2a-557c-40ae-99d3-4e6b4eed1d83 |
_version_ |
1766221606670041088 |