Geoelectric Structural Directions And Dimensionality Of The Damara Belt and Surrounding Cratons

Abstract:

Magnetotelluric (MT) soundings were made along three transects, as part of the broader Southern African Magnetotelluric Experiment (SAMTEX), crossing the Kalahari Craton, the Neo-Proterozoic Ghanzi-Chobe/Damara belts (collectively termed the DMB) and the southern Congo/Angola craton in an effort to define the geo-electric structure across the region. The McNeice and Jones (2001) distortion decomposition technique was applied to the MT data and indicate significant depth and along-profile variations in geo-electric strike and dimensionality on all the three transects crossing these three tectonic units (ie Kalahari craton, Congo/Angola craton and the DMB). The geo-electric strikes are generally parallel to the North-East trending tectonic fabric as inferred from the magnetic data, but the significant strike variations with depth are expressions of heterogeneity in the lithospheric structure. The Kalahari craton …

Año de publicación:

2009

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