Physics – Geophysics
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1941u&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 13, p. 1941-1944
Physics
Geophysics
7
Marine Geology And Geophysics: Plate Tectonics, Tectonophysics: Dynamics, Gravity And Tectonics, Information Related To Geographic Region: Indian Ocean, Seismology: Oceanic Crust
Scientific paper
A new set of seismic reflection and refraction lines has been interpreted regarding the basement and crustal structure of the southern Agulhas Plateau. A large number of extrusion centres were identified. Lava flows dip away from those extrusion centres and form subparallel-stratified sequences. We interpret those extrusion centres as the result of excessive volcanism in course of the separation of the southern Agulhas Plateau from the Maud Rise. Since the sedimentary layers appear to be little affected by the volcanism, that episode obviously ceased before onset of sedimentation in Late Cretaceous times. We have not found evidence for continental fragments within overthickened, predominantly oceanic crust. We therefore propose that the Agulhas Plateau belongs to the world-wide suite of Large Igneous Provinces (LIP) of predominantly oceanic origin.
Ehrhard Axel
Gohl Karsten
Seargent Michael
Uenzelmann-Neben Gabriele
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