Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough
The Yermak Plateau forms the northernmost plateau of the Eurasian plate. It is believedto be formed as a consequence of relative motions between Greenland andSvalbard. Large parts of the plateau might consist of heavily intruded continental crustand/or are of oceanic origin. The intruded material ar...
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ftawi:oai:epic.awi.de:11892 2023-09-05T13:19:31+02:00 Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough Jokat, Wilfried Schroeder, Michael Leinweber, Volker Thor Schenke, Hans-Werner 2005 https://epic.awi.de/id/eprint/11892/ https://hdl.handle.net/10013/epic.22331 unknown Jokat, W. orcid:0000-0002-7793-5854 , Schroeder, M. , Leinweber, V. T. and Schenke, H. W. (2005) Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough , EGU 2005, Wien. . hdl:10013/epic.22331 EPIC3EGU 2005, Wien. Conference notRev 2005 ftawi 2023-08-22T19:49:36Z The Yermak Plateau forms the northernmost plateau of the Eurasian plate. It is believedto be formed as a consequence of relative motions between Greenland andSvalbard. Large parts of the plateau might consist of heavily intruded continental crustand/or are of oceanic origin. The intruded material are most likely erupted during thefinal formation of the western Gakkel Ridge some 35 Ma. As a consequence of thecontinuous separation of Greenland and Svalbard an active spreading system, the LenaTrough, in the Fram Strait developed.This general scenario is well accepted, but details on the crustal structure, sedimentdistribution and basement origin of the Yermak Plateau and the Lena Troughare unknown. Recent bathymetric, petrological and geophysical investigations haveincreased the first order information for this region significantly. E.g. the newbathymetry shows that in contrary to older models, no complex geometry of thespreading system is present. The Lena Trough system is only to a minor amount disruptedby transforms.The problem in detailed dating the spreading history of the Lena Trough, and in reversethe opening of the Fram Strait is the absence of good spreading anomalies. Newaeromagnetic data confirm this observation from regional surveys. The magnetic fieldis extremely smooth south of 82°N. However, linking this information with the latestresults from RV Polarstern expeditions in 2004 explains at least these observations. Itseems that most of the oceanic crust in the Lena Trough is build up by peridotites.In addition to the investigation across the Lena Trough new seismic data were acquiredin 2004 across the Yermak Plateau to map the shape of the basement. The seismicdata show that the basement is very rough in the oceanic part of the plateau, and thattowards the east a major tectonic boundary exists. This boundary is visible also in thegravity and to minor amount in the magnetic data. The seismic data suggest that thisboundary might represent an area of different stress directions.In summary the latest ... Conference Object Fram Strait Greenland Svalbard Yermak plateau Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Greenland Svalbard Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) |
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 |
The Yermak Plateau forms the northernmost plateau of the Eurasian plate. It is believedto be formed as a consequence of relative motions between Greenland andSvalbard. Large parts of the plateau might consist of heavily intruded continental crustand/or are of oceanic origin. The intruded material are most likely erupted during thefinal formation of the western Gakkel Ridge some 35 Ma. As a consequence of thecontinuous separation of Greenland and Svalbard an active spreading system, the LenaTrough, in the Fram Strait developed.This general scenario is well accepted, but details on the crustal structure, sedimentdistribution and basement origin of the Yermak Plateau and the Lena Troughare unknown. Recent bathymetric, petrological and geophysical investigations haveincreased the first order information for this region significantly. E.g. the newbathymetry shows that in contrary to older models, no complex geometry of thespreading system is present. The Lena Trough system is only to a minor amount disruptedby transforms.The problem in detailed dating the spreading history of the Lena Trough, and in reversethe opening of the Fram Strait is the absence of good spreading anomalies. Newaeromagnetic data confirm this observation from regional surveys. The magnetic fieldis extremely smooth south of 82°N. However, linking this information with the latestresults from RV Polarstern expeditions in 2004 explains at least these observations. Itseems that most of the oceanic crust in the Lena Trough is build up by peridotites.In addition to the investigation across the Lena Trough new seismic data were acquiredin 2004 across the Yermak Plateau to map the shape of the basement. The seismicdata show that the basement is very rough in the oceanic part of the plateau, and thattowards the east a major tectonic boundary exists. This boundary is visible also in thegravity and to minor amount in the magnetic data. The seismic data suggest that thisboundary might represent an area of different stress directions.In summary the latest ... |
format |
Conference Object |
author |
Jokat, Wilfried Schroeder, Michael Leinweber, Volker Thor Schenke, Hans-Werner |
spellingShingle |
Jokat, Wilfried Schroeder, Michael Leinweber, Volker Thor Schenke, Hans-Werner Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
author_facet |
Jokat, Wilfried Schroeder, Michael Leinweber, Volker Thor Schenke, Hans-Werner |
author_sort |
Jokat, Wilfried |
title |
Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
title_short |
Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
title_full |
Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
title_fullStr |
Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
title_full_unstemmed |
Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough |
title_sort |
insights into the evolution of the yermak plateau and the adjacent lena trough |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/11892/ https://hdl.handle.net/10013/epic.22331 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Gakkel Ridge Greenland Svalbard Yermak Plateau |
geographic_facet |
Gakkel Ridge Greenland Svalbard Yermak Plateau |
genre |
Fram Strait Greenland Svalbard Yermak plateau |
genre_facet |
Fram Strait Greenland Svalbard Yermak plateau |
op_source |
EPIC3EGU 2005, Wien. |
op_relation |
Jokat, W. orcid:0000-0002-7793-5854 , Schroeder, M. , Leinweber, V. T. and Schenke, H. W. (2005) Insights into the evolution of the Yermak Plateau and the adjacent Lena Trough , EGU 2005, Wien. . hdl:10013/epic.22331 |
_version_ |
1776200321094123520 |