Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets
The western part of Dronning Maud Land (DML), Antarctica, principally consistof the Archean Grunehogna Craton and the Grenville-age (1.1 Ga) Maud Province(Jacobs, 1991). Most of the area is covered by ice. Outcrops are the mountainranges Heimefrontfjella, Kirvanveggen and Sverdrupfjella. These are t...
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ftawi:oai:epic.awi.de:14525 2024-09-15T17:47:06+00:00 Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich 2003 application/pdf https://epic.awi.de/id/eprint/14525/ https://epic.awi.de/id/eprint/14525/1/Hof2003d.pdf https://hdl.handle.net/10013/epic.24819 https://hdl.handle.net/10013/epic.24819.d001 unknown https://epic.awi.de/id/eprint/14525/1/Hof2003d.pdf https://hdl.handle.net/10013/epic.24819.d001 Hoffmann, M. , Eckstaller, A. , Jokat, W. orcid:0000-0002-7793-5854 and Miller, H. (2003) Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets , Workshop "East-West Antarctic Tectonics and Gondwana Breakup 60W to 60E" at ISAES IX meeting, Potsdam, September 8-12 . hdl:10013/epic.24819 EPIC3Workshop "East-West Antarctic Tectonics and Gondwana Breakup 60W to 60E" at ISAES IX meeting, Potsdam, September 8-12, 2003 p. Conference notRev 2003 ftawi 2024-06-24T03:58:50Z The western part of Dronning Maud Land (DML), Antarctica, principally consistof the Archean Grunehogna Craton and the Grenville-age (1.1 Ga) Maud Province(Jacobs, 1991). Most of the area is covered by ice. Outcrops are the mountainranges Heimefrontfjella, Kirvanveggen and Sverdrupfjella. These are the westernparts of the East Antarctic Orogen, the southern continuation of the EastAfrican Orogen, formed during the collision of East and West Gondwana(Pan-African orogenesis, ca 550. Ma).The Heimefrontfjella metamorphic complex is splitted by the Heimefront shearzone. This steeply dipping and NE trending dextral shear zone separates tworegions with a different tectonic history: the Vardeklettane and Kottas terranewith Grenvillian crust at the NW side and the Sivorgfjella Terrane with strongPan-African tectono-thermal overprinted crust at the SE side of the shear zone.(Golynsky & Jacobs, 2001)The structure of the crust and mantle in western DML is mostly unknown.Especially the deeper crustal fabric along the geological boundaries is ofgreat interest. Thus, during the Antarctic summer 2002/2003, a temporaryseismometer network consisting of five seismometers was installed along a 250km line crossing the Heimefrontfjella shear zone. In addition a permanentbroadband seismometer station at Kohnen Station (ca. 75?S, 0?E) wasestablished. In combination with registrations from the Neumayer seismometernetwork and the seismometer at the South African SANAE IV Station, a spatialmapping of crust thickness (Moho depth) by means of calculating the receiverfunctions will be obtained. Further analysis of the data will yield to therecent/past strain/stress distribution (seismic anisotropy) and the detectionof local seismicity.Preliminary results (Eckstaller, et al., 1991) from a analysis of a refractionseismic profile, perpendicular to the shear zone, are showing different regionsof crustal thickness: in the north-west 42 km and in the south-east 50 km. Thisconfirms that the Heimefrontfjella shear zone is also a boundary in terms ... Conference Object Antarc* Antarctic Antarctica DML Dronning Maud Land Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The western part of Dronning Maud Land (DML), Antarctica, principally consistof the Archean Grunehogna Craton and the Grenville-age (1.1 Ga) Maud Province(Jacobs, 1991). Most of the area is covered by ice. Outcrops are the mountainranges Heimefrontfjella, Kirvanveggen and Sverdrupfjella. These are the westernparts of the East Antarctic Orogen, the southern continuation of the EastAfrican Orogen, formed during the collision of East and West Gondwana(Pan-African orogenesis, ca 550. Ma).The Heimefrontfjella metamorphic complex is splitted by the Heimefront shearzone. This steeply dipping and NE trending dextral shear zone separates tworegions with a different tectonic history: the Vardeklettane and Kottas terranewith Grenvillian crust at the NW side and the Sivorgfjella Terrane with strongPan-African tectono-thermal overprinted crust at the SE side of the shear zone.(Golynsky & Jacobs, 2001)The structure of the crust and mantle in western DML is mostly unknown.Especially the deeper crustal fabric along the geological boundaries is ofgreat interest. Thus, during the Antarctic summer 2002/2003, a temporaryseismometer network consisting of five seismometers was installed along a 250km line crossing the Heimefrontfjella shear zone. In addition a permanentbroadband seismometer station at Kohnen Station (ca. 75?S, 0?E) wasestablished. In combination with registrations from the Neumayer seismometernetwork and the seismometer at the South African SANAE IV Station, a spatialmapping of crust thickness (Moho depth) by means of calculating the receiverfunctions will be obtained. Further analysis of the data will yield to therecent/past strain/stress distribution (seismic anisotropy) and the detectionof local seismicity.Preliminary results (Eckstaller, et al., 1991) from a analysis of a refractionseismic profile, perpendicular to the shear zone, are showing different regionsof crustal thickness: in the north-west 42 km and in the south-east 50 km. Thisconfirms that the Heimefrontfjella shear zone is also a boundary in terms ... |
format |
Conference Object |
author |
Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich |
spellingShingle |
Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
author_facet |
Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich |
author_sort |
Hoffmann, Maike |
title |
Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
title_short |
Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
title_full |
Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
title_fullStr |
Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
title_full_unstemmed |
Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets |
title_sort |
development of a 3-d crustal model in the western dronning maud land region, antarctica, from the interpretation of different geophysical data sets |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/14525/ https://epic.awi.de/id/eprint/14525/1/Hof2003d.pdf https://hdl.handle.net/10013/epic.24819 https://hdl.handle.net/10013/epic.24819.d001 |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land |
op_source |
EPIC3Workshop "East-West Antarctic Tectonics and Gondwana Breakup 60W to 60E" at ISAES IX meeting, Potsdam, September 8-12, 2003 p. |
op_relation |
https://epic.awi.de/id/eprint/14525/1/Hof2003d.pdf https://hdl.handle.net/10013/epic.24819.d001 Hoffmann, M. , Eckstaller, A. , Jokat, W. orcid:0000-0002-7793-5854 and Miller, H. (2003) Development of a 3-D Crustal Model in the Western Dronning Maud Land Region, Antarctica, from the Interpretation of different geophysical data sets , Workshop "East-West Antarctic Tectonics and Gondwana Breakup 60W to 60E" at ISAES IX meeting, Potsdam, September 8-12 . hdl:10013/epic.24819 |
_version_ |
1810495728374513664 |