TY - JOUR
T1 - Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa
AU - Ortiz, Kameron
AU - Nyblade, Andrew
AU - van der Meijde, Mark
AU - Paulssen, Hanneke
AU - Kwadiba, Motsamai
AU - Ntibinyane, Onkgopotse
AU - Durrheim, Raymond
AU - Fadel, Islam
AU - Homman, Kyle
N1 - Funding Information:
This work was supported by grant ALW-GO-AO/11-30 provided by Nederlandse Organisatievoor Wetenschappelijk Onderzoek (NWO) and National Science Foundation grants 0440032, 0530062, 0824781, 1128936, and 1634108. We acknowledge the efforts of Arie van Wettum from Utrecht University and colleagues at the Botswana Geological Survey for installing and maintaining the NARS-Botswana network, and thank two anonymous reviewers for helpful and constructive reviews. Data used in this study can be obtained from the IRIS data management center (http://ds.iris.edu/ds/).
Publisher Copyright:
© 2019. American Geophysical Union. All Rights Reserved.
PY - 2019/8/28
Y1 - 2019/8/28
N2 - New broadband seismic data from Botswana and South Africa have been combined with existing data from the region to develop improved P and S wave velocity models for investigating the upper mantle structure of southern Africa. Higher craton-like velocities are imaged beneath the Rehoboth Province and parts of the northern Okwa Terrane and the Magondi Belt, indicating that the northern edge of the greater Kalahari Craton lithosphere lies along the northern boundary of these terranes. Lower off-craton velocities are imaged beneath the Damara-Ghanzi-Chobe Belt, and may in part reflect thinning of the lithosphere beneath the incipient Okavango Rift. Lower velocities are also imaged to the north and northwest of the Bushveld Complex beneath parts of the Okwa Terrane, Magondi Belt, and Limpopo Belt, indicating that cratonic upper mantle in some areas beneath these terranes may have been modified by the 2.05-Ga Bushveld and/or 1.1-Ga Umkondo magmatic events.
AB - New broadband seismic data from Botswana and South Africa have been combined with existing data from the region to develop improved P and S wave velocity models for investigating the upper mantle structure of southern Africa. Higher craton-like velocities are imaged beneath the Rehoboth Province and parts of the northern Okwa Terrane and the Magondi Belt, indicating that the northern edge of the greater Kalahari Craton lithosphere lies along the northern boundary of these terranes. Lower off-craton velocities are imaged beneath the Damara-Ghanzi-Chobe Belt, and may in part reflect thinning of the lithosphere beneath the incipient Okavango Rift. Lower velocities are also imaged to the north and northwest of the Bushveld Complex beneath parts of the Okwa Terrane, Magondi Belt, and Limpopo Belt, indicating that cratonic upper mantle in some areas beneath these terranes may have been modified by the 2.05-Ga Bushveld and/or 1.1-Ga Umkondo magmatic events.
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U2 - 10.1029/2019GL084053
DO - 10.1029/2019GL084053
M3 - Article
AN - SCOPUS:85071273006
SN - 0094-8276
VL - 46
SP - 9509
EP - 9518
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 16
ER -