A possible new impact structure in the Okavango Delta, Botswana
Published:September 01, 2010
G.R.J. Cooper, S.J. Webb, R.L. Gibson, I. Martinez, 2010. "A possible new impact structure in the Okavango Delta, Botswana", Large Meteorite Impacts and Planetary Evolution IV, Roger L. Gibson, Wolf Uwe Reimold
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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.