Article (Scientific journals)
Crustal structure of the southern margin of the African continent: Results from geophysical experiments
Stankiewicz, Jacek; Parsiegla, N.; Ryberg, T. et al.
2008In Journal of Geophysical Research. Solid Earth, 113 (10)
Peer Reviewed verified by ORBi
 

Files


Full Text
Journal of Geophysical Research Solid Earth - 2008 - Stankiewicz - Crustal structure of the southern margin of the African.pdf
Publisher postprint (6.41 MB)
Download

All documents in ORBilu are protected by a user license.

Send to



Details



Abstract :
[en] A number of geophysical onshore and offshore experiments were carried out along a profile across the southern margin of the African Plate in the framework of the Inkaba yeAfrica project. Refraction seismic experiments show that Moho depth decreases rapidly from over 40 km inland to around 30 km at the present coast before gently thinning out toward the Agulhas-Falkland Fracture Zone, which marks the transition zone between the continental and oceanic crust. In the region of the abruptly decreasing Moho depth, in the vicinity of the boundary between the Namaqua-Natal Mobile Belt and the Cape Fold Belt, lower crustal P-wave velocities up to 7.4 km/s are observed. This is interpreted as metabasic lithologies of Precambrian age in the Namaqua-Natal Mobile Belt, or mafic intrusions added to the base of the crust by younger magmatism. The velocity model for the upper crust has excellent resolution and is consistent with the known geological record. A joint interpretation of the velocity model with an electrical conductivity model, obtained from magnetotelluric studies, makes it possible to correlate a high-velocity anomaly north of the center of the Beattie magnetic anomaly with a highly resistive body
Disciplines :
Earth sciences & physical geography
Author, co-author :
Stankiewicz, Jacek ;  University of Luxembourg > Faculty of Humanities, Education and Social Sciences (FHSE) > Department of Social Sciences (DSOC)
Parsiegla, N.
Ryberg, T.
Gohl, K.
Weckmann, U.
Trumbull, R.
Weber, M.
External co-authors :
yes
Language :
English
Title :
Crustal structure of the southern margin of the African continent: Results from geophysical experiments
Publication date :
2008
Journal title :
Journal of Geophysical Research. Solid Earth
ISSN :
2169-9356
Publisher :
Wiley, Hoboken, Unknown/unspecified
Volume :
113
Issue :
10
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 08 September 2022

Statistics


Number of views
56 (2 by Unilu)
Number of downloads
6 (0 by Unilu)

Scopus citations®
 
30
Scopus citations®
without self-citations
22
WoS citations
 
28

Bibliography


Similar publications



Contact ORBilu