Geophysical study of the conjugate East African and East Antarctic margins
New data on the conjugate African and Antarctic margins constrain the relative movements from Jurassic to Cretaceous times. Two seismic refraction profiles across the central Mozambique margin show southward thinning crust and a lower crustal high-velocity-body. New magnetic data image the continent...
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Universität Bremen
2011
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/225 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102348-19 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/225 2023-05-15T14:04:15+02:00 Geophysical study of the conjugate East African and East Antarctic margins Geophysikalische Studie der konjugierenden ostafrikanischen und ostantarktischen Kontinentalränder Leinweber, Volker Thor Krawczyk, Charlotte Miller, Heinrich Briais, Anne 2011-07-20 application/pdf https://media.suub.uni-bremen.de/handle/elib/225 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102348-19 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/225 urn:nbn:de:gbv:46-00102348-19 info:eu-repo/semantics/openAccess Gondwana breakup Mozambique Channel Riiser-Larsen Sea Mozambique Ridge Natal Valley Astrid Ridge Seismic refraction Magnetics Gravity 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2011 ftsubbremen 2022-11-09T07:09:20Z New data on the conjugate African and Antarctic margins constrain the relative movements from Jurassic to Cretaceous times. Two seismic refraction profiles across the central Mozambique margin show southward thinning crust and a lower crustal high-velocity-body. New magnetic data image the continent-ocean-transition close to the coast. M41n is assumed to correspond to the oldest oceanic crust. New potential field data across the Mozambique Ridge and the Natal Valley point to mainly oceanic crust south of the Lebombo. Magnetic data give evidence for the Astrid Ridge being divided into two oceanic parts. The continent-ocean-transition in the Cosmonauts Sea is imaged in aeromagnetic data. The absence of spreading anomalies points to oceanic crust emplaced during the Cretaceous normal superchron. A resulting kinematic model postulates a tight Gondwana fit and a two-stage breakup with the Grunehogna Craton moving south to the east of the Mozambique Fracture Zone during the second stage. Doctoral or Postdoctoral Thesis Antarc* Antarctic Cosmonauts sea Riiser-Larsen Sea Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Antarctic Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Riiser-Larsen Sea ENVELOPE(24.000,24.000,-68.000,-68.000) Grunehogna ENVELOPE(-2.750,-2.750,-72.033,-72.033) Astrid Ridge ENVELOPE(12.000,12.000,-68.000,-68.000) Cosmonauts Sea ENVELOPE(45.047,45.047,-64.939,-64.939) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Gondwana breakup Mozambique Channel Riiser-Larsen Sea Mozambique Ridge Natal Valley Astrid Ridge Seismic refraction Magnetics Gravity 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
Gondwana breakup Mozambique Channel Riiser-Larsen Sea Mozambique Ridge Natal Valley Astrid Ridge Seismic refraction Magnetics Gravity 550 550 Earth sciences and geology ddc:550 Leinweber, Volker Thor Geophysical study of the conjugate East African and East Antarctic margins |
topic_facet |
Gondwana breakup Mozambique Channel Riiser-Larsen Sea Mozambique Ridge Natal Valley Astrid Ridge Seismic refraction Magnetics Gravity 550 550 Earth sciences and geology ddc:550 |
description |
New data on the conjugate African and Antarctic margins constrain the relative movements from Jurassic to Cretaceous times. Two seismic refraction profiles across the central Mozambique margin show southward thinning crust and a lower crustal high-velocity-body. New magnetic data image the continent-ocean-transition close to the coast. M41n is assumed to correspond to the oldest oceanic crust. New potential field data across the Mozambique Ridge and the Natal Valley point to mainly oceanic crust south of the Lebombo. Magnetic data give evidence for the Astrid Ridge being divided into two oceanic parts. The continent-ocean-transition in the Cosmonauts Sea is imaged in aeromagnetic data. The absence of spreading anomalies points to oceanic crust emplaced during the Cretaceous normal superchron. A resulting kinematic model postulates a tight Gondwana fit and a two-stage breakup with the Grunehogna Craton moving south to the east of the Mozambique Fracture Zone during the second stage. |
author2 |
Krawczyk, Charlotte Miller, Heinrich Briais, Anne |
format |
Doctoral or Postdoctoral Thesis |
author |
Leinweber, Volker Thor |
author_facet |
Leinweber, Volker Thor |
author_sort |
Leinweber, Volker Thor |
title |
Geophysical study of the conjugate East African and East Antarctic margins |
title_short |
Geophysical study of the conjugate East African and East Antarctic margins |
title_full |
Geophysical study of the conjugate East African and East Antarctic margins |
title_fullStr |
Geophysical study of the conjugate East African and East Antarctic margins |
title_full_unstemmed |
Geophysical study of the conjugate East African and East Antarctic margins |
title_sort |
geophysical study of the conjugate east african and east antarctic margins |
publisher |
Universität Bremen |
publishDate |
2011 |
url |
https://media.suub.uni-bremen.de/handle/elib/225 https://nbn-resolving.org/urn:nbn:de:gbv:46-00102348-19 |
long_lat |
ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(24.000,24.000,-68.000,-68.000) ENVELOPE(-2.750,-2.750,-72.033,-72.033) ENVELOPE(12.000,12.000,-68.000,-68.000) ENVELOPE(45.047,45.047,-64.939,-64.939) |
geographic |
Antarctic Riiser-Larsen Riiser-Larsen Sea Grunehogna Astrid Ridge Cosmonauts Sea |
geographic_facet |
Antarctic Riiser-Larsen Riiser-Larsen Sea Grunehogna Astrid Ridge Cosmonauts Sea |
genre |
Antarc* Antarctic Cosmonauts sea Riiser-Larsen Sea |
genre_facet |
Antarc* Antarctic Cosmonauts sea Riiser-Larsen Sea |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/225 urn:nbn:de:gbv:46-00102348-19 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766275275922866176 |