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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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Botswana
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Okavango Delta (1)
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Kaapvaal Craton (1)
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Karoo Basin (3)
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South Africa
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Bushveld Complex (2)
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Cape fold belt (2)
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Limpopo South Africa (1)
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North-West Province South Africa (1)
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Atlantic Ocean
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South Atlantic
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Cape Basin (1)
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commodities
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petroleum
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natural gas
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shale gas (2)
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geologic age
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Cenozoic (1)
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upper Precambrian
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igneous rocks
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igneous rocks
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plutonic rocks
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diabase (2)
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ferrodiorite (1)
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minerals
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oxides
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iron oxides (1)
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silicates
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framework silicates
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feldspar group
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plagioclase (1)
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orthosilicates
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nesosilicates
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olivine group (1)
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Primary terms
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Africa
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Southern Africa
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Botswana
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Okavango Delta (1)
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Kaapvaal Craton (1)
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Karoo Basin (3)
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South Africa
-
Bushveld Complex (2)
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Cape fold belt (2)
-
Limpopo South Africa (1)
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North-West Province South Africa (1)
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-
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Atlantic Ocean
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South Atlantic
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Cape Basin (1)
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-
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Cenozoic (1)
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crust (1)
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geophysical methods (6)
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igneous rocks
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plutonic rocks
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diabase (2)
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diorites
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ferrodiorite (1)
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intrusions (2)
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isostasy (1)
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Mesozoic
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Jurassic
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Middle Jurassic (1)
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Paleozoic
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Carboniferous
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Lower Carboniferous (1)
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Upper Carboniferous (1)
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Permian
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Ecca Group (1)
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Whitehill Formation (3)
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-
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petroleum
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natural gas
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shale gas (2)
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-
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Precambrian
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Archean (1)
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Transvaal Supergroup (1)
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upper Precambrian
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Proterozoic
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Paleoproterozoic
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Rooiberg Group (1)
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Rustenburg Layered Suite (1)
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-
-
-
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rock formations
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Beaufort Group (1)
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GeoRef Categories
Era and Period
Epoch and Age
Date
Availability
Uncovering the southern Bushveld Complex, using reflection seismic and gravity data Available to Purchase
Seismic imaging of dolerite sills and volcanic vents in the Central Karoo, South Africa: implications for shale gas potential Available to Purchase
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
NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA Available to Purchase
GEOPHYSICALLY PLUMBING THE MAIN KAROO BASIN, SOUTH AFRICA Available to Purchase
A possible new impact structure in the Okavango Delta, Botswana Available to Purchase
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.