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@BOOK{Bauer:231129,
author = {Bauer, Wilfried},
title = {{D}ie geologische {E}ntwicklung an der {G}renze zwischen
{W}est- und {O}st-{G}ondwana im atlantischen {S}ektor
{A}ntarktikas},
volume = {44},
address = {Aachen},
publisher = {Mainz [u.a.]},
reportid = {RWTH-CONV-111407},
isbn = {978-3-86130-708-2},
series = {Aachener geowissenschaftliche Beiträge},
pages = {48 S. : Ill., zahlr. Kt.},
year = {2010},
note = {Zweitveröffentlicht auf dem Publikationsserver der RWTH
Aachen University; Vollst. zugl.: Aachen, Techn. Hochsch.,
Habil.-Schr., 2003},
abstract = {The mountains of Dronning Maud Land (DML) cover the area
from 18°W to 28°E parallel to the coastline of Antarctica.
The ranges occur either as elongate N-S nunatak chains,
divided by minor glaciers, or as steep escarpments
separating the polar plateau from the ice-covered coastal
plains. DML is one of the key regions for Mesoproterozoic to
Cambrian plate movement reconstructions. In modern plate
reconstructions of the Paleozoic Gondwana supercontinent the
southward continuation of the Pan-African aged Mozambique
Belt of E-Africa has to be expected in DML. This mobile belt
was formed as a result of continent-continent collision
following the closure of the Mozambique Ocean, which led to
the final amalgamation of West and East Gondwana. The
precise position of the collision suture is still under
debate. Recent palaeomagnetic, geochronological and
aeromagnetic studies show that DML can be subdivided into
three distinct areas with different geological histories:
(1) an Archaean craton with an undeformed Proterozoic cover;
(2) a Late Mesoproterozoic collision orogen and (3) a
Pan-African-aged collision orogen with relics of
pre-Pan-African structures and voluminous post-tectonic
intrusives. In western Dronning Maud Land rocks of a
juvenile Mesoproterozoic island arc which was accreted to
the Kapvaal-Grunehgna Craton at ~ 1.1 Ga are well
documented. Mesoproterozoic rocks were also detected by
zircon SHRIMP dating of gneisses further east in central
Dronning Maud Land. Tectonothermal events at the end of the
Mesoproterozoic and at Late Neoproterozoic/Cambrian times
("Pan-African") have been proved within the metamorphic belt
in central Dronning Maud Land, combined with an amphibolite
to granulite facies metamorphism and syntectonic granitoid
emplacement. During this orogeny older structures were
completely overprinted in a sinistral tranpressive
deformation regime, leading to the mainly coast-parallel
tectonic structures of the East Antarctic Orogen. Putting
Antarctica back in its Gondwana position, the East Antarctic
Orogen continues northward in E-Africa as the East African
Orogen, whereas a connection to the marginal Ross Orogen at
the Pacific margin of East Antarctica is suggested along the
Shackleton Range. The East Antarctic/East African Orogen
resulted from closure of the "Mozambique Ocean" and
collision of West and East Gondwana, i.e. western Dronning
Maud Land was part of West Gondwana. During this collision
the lithospheric mantle probably delaminated, allowing the
asthenosphere to underplate the continental crust and
producing heat for the voluminous, typically anhydrous
Pan-African granitoids of central Dronning Maud Land.},
keywords = {Königin-Maud-Land (SWD) / Tektonik (SWD) / Gesteinskunde
(SWD) / Geochemie (SWD) / Geochronologie (SWD)},
cin = {530000 / 531110},
ddc = {550},
cid = {$I:(DE-82)530000_20140620$ / $I:(DE-82)531110_20140620$},
typ = {PUB:(DE-HGF)3},
urn = {urn:nbn:de:hbz:82-opus-31452},
url = {https://publications.rwth-aachen.de/record/231129},
}
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