Investigations of Crustal Structures beneath Dronning Maud Land
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:9682 2023-09-05T13:13:39+02:00 Investigations of Crustal Structures beneath Dronning Maud Land Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich 2003 application/pdf https://epic.awi.de/id/eprint/9682/ https://epic.awi.de/id/eprint/9682/1/Hof2003b.pdf https://hdl.handle.net/10013/epic.20183 https://hdl.handle.net/10013/epic.20183.d001 unknown https://epic.awi.de/id/eprint/9682/1/Hof2003b.pdf https://hdl.handle.net/10013/epic.20183.d001 Hoffmann, M. , Eckstaller, A. , Jokat, W. orcid:0000-0002-7793-5854 and Miller, H. (2003) Investigations of Crustal Structures beneath Dronning Maud Land , ISAES 9th International Symposium on Antarctic Earth Sciences 8. - 12. September 2003, Potsdam, Germany . hdl:10013/epic.20183 EPIC3ISAES 9th International Symposium on Antarctic Earth Sciences 8. - 12. September 2003, Potsdam, Germany Conference notRev 2003 ftawi 2023-08-22T19:48:11Z 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) Antarctic The Antarctic Dronning Maud Land Neumayer Kohnen ENVELOPE(0.000,0.000,-75.000,-75.000) Kohnen Station ENVELOPE(0.000,0.000,-75.000,-75.000) Heimefrontfjella ENVELOPE(-11.000,-11.000,-74.667,-74.667) SANAE ENVELOPE(-2.850,-2.850,-71.667,-71.667) Grunehogna ENVELOPE(-2.750,-2.750,-72.033,-72.033) SANAE IV ENVELOPE(-2.850,-2.850,-71.667,-71.667) Sverdrupfjella ENVELOPE(0.583,0.583,-72.700,-72.700) Vardeklettane ENVELOPE(-12.867,-12.867,-75.008,-75.008) Sivorgfjella ENVELOPE(-11.333,-11.333,-74.683,-74.683) SANAE IV Station ENVELOPE(-2.829,-2.829,-71.674,-71.674) |
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 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 Investigations of Crustal Structures beneath Dronning Maud Land |
author_facet |
Hoffmann, Maike Eckstaller, Alfons Jokat, Wilfried Miller, Heinrich |
author_sort |
Hoffmann, Maike |
title |
Investigations of Crustal Structures beneath Dronning Maud Land |
title_short |
Investigations of Crustal Structures beneath Dronning Maud Land |
title_full |
Investigations of Crustal Structures beneath Dronning Maud Land |
title_fullStr |
Investigations of Crustal Structures beneath Dronning Maud Land |
title_full_unstemmed |
Investigations of Crustal Structures beneath Dronning Maud Land |
title_sort |
investigations of crustal structures beneath dronning maud land |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/9682/ https://epic.awi.de/id/eprint/9682/1/Hof2003b.pdf https://hdl.handle.net/10013/epic.20183 https://hdl.handle.net/10013/epic.20183.d001 |
long_lat |
ENVELOPE(0.000,0.000,-75.000,-75.000) ENVELOPE(0.000,0.000,-75.000,-75.000) ENVELOPE(-11.000,-11.000,-74.667,-74.667) ENVELOPE(-2.850,-2.850,-71.667,-71.667) ENVELOPE(-2.750,-2.750,-72.033,-72.033) ENVELOPE(-2.850,-2.850,-71.667,-71.667) ENVELOPE(0.583,0.583,-72.700,-72.700) ENVELOPE(-12.867,-12.867,-75.008,-75.008) ENVELOPE(-11.333,-11.333,-74.683,-74.683) ENVELOPE(-2.829,-2.829,-71.674,-71.674) |
geographic |
Antarctic The Antarctic Dronning Maud Land Neumayer Kohnen Kohnen Station Heimefrontfjella SANAE Grunehogna SANAE IV Sverdrupfjella Vardeklettane Sivorgfjella SANAE IV Station |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land Neumayer Kohnen Kohnen Station Heimefrontfjella SANAE Grunehogna SANAE IV Sverdrupfjella Vardeklettane Sivorgfjella SANAE IV Station |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land |
op_source |
EPIC3ISAES 9th International Symposium on Antarctic Earth Sciences 8. - 12. September 2003, Potsdam, Germany |
op_relation |
https://epic.awi.de/id/eprint/9682/1/Hof2003b.pdf https://hdl.handle.net/10013/epic.20183.d001 Hoffmann, M. , Eckstaller, A. , Jokat, W. orcid:0000-0002-7793-5854 and Miller, H. (2003) Investigations of Crustal Structures beneath Dronning Maud Land , ISAES 9th International Symposium on Antarctic Earth Sciences 8. - 12. September 2003, Potsdam, Germany . hdl:10013/epic.20183 |
_version_ |
1776204856479973376 |