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Journal Article

Uncovering the southern Bushveld Complex, using reflection seismic and gravity data Available to Purchase

S.E. Scheiber-Enslin, S.J. Webb, M. Manzi
Published: 01 December 2024
South African Journal of Geology (2024) 127 (4): 731–748.
DOI: https://doi.org/10.25131/sajg.127.0040
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Journal Article

Seismic imaging of dolerite sills and volcanic vents in the Central Karoo, South Africa: implications for shale gas potential Available to Purchase

S.E. Scheiber-Enslin, M. Manzi, S.J. Webb
Published: 01 June 2021
South African Journal of Geology (2021) 124 (2): 465–480.
DOI: https://doi.org/10.25131/sajg.124.0043
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Journal Article

Experimental studies of elastic wave velocities and densities in rocks from the Bushveld Complex, South Africa: implications for deep reflection seismic surveys Available to Purchase

O. Shithigona, M.S.D. Manzi, L.D. Ashwal, G.M. Bybee, S.J. Webb
Published: 01 September 2018
South African Journal of Geology (2018) 121 (3): 311–326.
DOI: https://doi.org/10.25131/sajg.121.0029
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Journal Article

NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA Available to Purchase

S.E. SCHEIBER-ENSLIN, J. EBBING, S.J. WEBB
Published: 01 September 2015
South African Journal of Geology (2015) 118 (3): 225–248.
DOI: https://doi.org/10.2113/gssajg.118.3.225
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Journal Article

GEOPHYSICALLY PLUMBING THE MAIN KAROO BASIN, SOUTH AFRICA Available to Purchase

S.E. SCHEIBER-ENSLIN, S.J. WEBB, J. EBBING
Published: 01 December 2014
South African Journal of Geology (2014) 117 (2): 275–300.
DOI: https://doi.org/10.2113/gssajg.117.2.275
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Book Chapter

A possible new impact structure in the Okavango Delta, Botswana Available to Purchase

Author(s)
G.R.J. Cooper, S.J. Webb, R.L. Gibson, I. Martinez
Book: Large Meteorite Impacts and Planetary Evolution IV
Publisher: Geological Society of America
Published: 01 September 2010
DOI: 10.1130/2010.2465(13)
Abstract
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Aeromagnetic data reveal a possible 15–20 km wide impact structure in the Okavango Delta, Botswana. The identified structure is located at 19°07′40.0″S, 23°18′12.7″E, and it is marked by a circular region of subdued magnetic intensity ~18 km across with a central magnetic peak. It does not appear to be visible in either Google Earth imagery or Shuttle Radar Topography Mission (SRTM) topographic data, and gravity data are too sparse in this region to image the structure. The regional magnetic fabric continues through the anomaly. The central magnetic peak has an amplitude of >700 nT. Modeling of the magnetic data indicates that the structure might be buried beneath ~200–500 m of sediments, and it has a magnetically modeled central uplift that is ~5 km wide.