ICONS atlas: AFR - Okavango Basin

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Overview

This page bundles the available data for the Okavango Basin in the Africa. The images are hyperlinks and will open up a separate window with a high resolution PDF image of the map.
The basin data is derived from a lower resolution grid which has been upsampled using GMT. This could have introduced an accuracy which is beyond the original data resolution.

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Okavango Basin location map
Basin name Okavango Basin
Region code AFR
Basin ID 7500
Plate location/code intra-cratonic/INC
Basin cross section

The basin cross section is automatically generated using the available crustal structure data sets. Sometimes the data labels are not plotted correctly, depending on the length of the section.

The location of the profile is indicated in all maps as dashed-dotted thin black line. For the endpoints of the profile, the two points of a given polygon located farthest away from each other were computed.

Okavango Basin cross section
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Dynamic topography evolution for basin centroid
Okavango Basin dynamic topography through time

The dynamic topography history for the basin is derived by tracking the basin centroid. The paleo-location for this point is computed using the EarthByte plate kinematic framework rotating the position back in time.

The dynamic topography model is derived from the S20RTS seismic tomography model (Ritsema et al., 99) by converting seismic velocites to density anomalies using an empirical scaling factor of 0.25. The density anomalies are then advected back in time to compute mantle flow with plate motions superimposed (using the EarthByte plate rotation framework) as surface boundary conditions. The dynamic topography is then derived from the computed density distribution using a free upper boundary. For details regarding the methodology see the following papers:

  • B. Steinberger, H. Schmeling, and G. Marquart. Large-scale lithospheric stress field and topography induced by global mantle circulation. Earth Planet. Sci. Lett., 186:75-91, 2001.
    doi: 10.1016/S0012-821X(01)00229-1.
  • B. Steinberger. Effects of latent heat release at phase boundaries on flow in the Earth's mantle, phase boundary topography and dynamic topography at the Earth's surface. Phys. Earth Planet. Int., 164:2-20, 2007.
    doi: 10.1016/j.pepi.2007.04.021.

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Observations

Mantle Lid thickness
Okavango Basin location map
Statistics - Mantle Lid thickness
Median 108.837
Mean 116.021
Scale 48.272
stdev 34.402
Z_min/Location 70.840/-17.0°Lat 23.0°Lon
Z_max/Location 161.418/ -11.5333°Lat 21.6°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Depth of 550 deg isotherm
Okavango Basin location map
Statistics - Depth of 550 deg isotherm
Median -42.078
Mean -44.359
Scale 6.885
stdev 6.351
Z_min/Location -53.002/-14.6667°Lat 18.7°Lon
Z_max/Location -37.000/ -19.0°Lat 24.0°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Mobil isopachs
Okavango Basin location map
Statistics - Mobil isopachs
Median 0.988
Mean 1.077
Scale 1.032
stdev 0.821
Z_min/Location -1.221/-15.5333°Lat 27.7667°Lon
Z_max/Location 2.573/ -15.6667°Lat 22.0333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Plain crustal thickness
Okavango Basin location map
Statistics - Plain crustal thickness
Median 40.806
Mean 40.924
Scale 3.969
stdev 3.164
Z_min/Location 33.628/-21.2333°Lat 16.2°Lon
Z_max/Location 46.262/ -14.7°Lat 22.8°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base middle crust
Okavango Basin location map
Statistics - Base middle crust
Median -27.870
Mean -27.751
Scale 2.700
stdev 2.248
Z_min/Location -31.284/-14.6667°Lat 22.9°Lon
Z_max/Location -22.092/ -21.4667°Lat 16.5333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base lower crust
Okavango Basin location map
Statistics - Base lower crust
Median -41.007
Mean -41.105
Scale 3.970
stdev 3.305
Z_min/Location -46.766/-14.6667°Lat 22.8667°Lon
Z_max/Location -32.915/ -21.4667°Lat 16.5333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Total crustal thickness
Okavango Basin location map
Statistics - Total crustal thickness
Median 42.117
Mean 42.262
Scale 3.771
stdev 3.184
Z_min/Location 33.756/-21.2333°Lat 16.2°Lon
Z_max/Location 47.825/ -14.6667°Lat 22.8667°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base upper crust
Okavango Basin location map
Statistics - Base upper crust
Median -14.315
Mean -14.015
Scale 1.527
stdev 1.433
Z_min/Location -16.102/-21.5667°Lat 21.4333°Lon
Z_max/Location -9.870/ -21.3333°Lat 17.2333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Thermal lithospheric thickness
Okavango Basin location map
Statistics - Thermal lithospheric thickness
Median 150.225
Mean 158.284
Scale 44.270
stdev 32.873
Z_min/Location 117.000/-14.0°Lat 26.0°Lon
Z_max/Location 200.007/ -14.6333°Lat 18.7333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Heatflow
Okavango Basin location map
Statistics - Heatflow
Median 55.420
Mean 55.974
Scale 4.546
stdev 3.590
Z_min/Location 49.275/-20.9667°Lat 22.1°Lon
Z_max/Location 65.437/ -16.0°Lat 19.9667°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Topography (ETOPO2)
Okavango Basin location map
Statistics - Topography (ETOPO2)
Median 1101.000
Mean 1137.830
Scale 151.225
stdev 157.156
Z_min/Location 559.000/-18.0333°Lat 26.7°Lon
Z_max/Location 2044.000/ -21.1°Lat 16.4333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Base hard sediments
Okavango Basin location map
Statistics - Base hard sediments
Median -0.226
Mean -0.181
Scale 0.816
stdev 0.947
Z_min/Location -2.725/-21.6333°Lat 21.1667°Lon
Z_max/Location 1.769/ -21.0333°Lat 17.7333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Temperature at 50km depth
Okavango Basin location map
Statistics - Temperature at 50km depth
Median 665.530
Mean 646.484
Scale 117.562
stdev 84.699
Z_min/Location 538.982/-14.6333°Lat 18.7333°Lon
Z_max/Location 758.000/ -14.0°Lat 26.0°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Laske sediment thickness
Okavango Basin location map
Statistics - Laske sediment thickness
Median 1.102
Mean 1.173
Scale 0.884
stdev 0.724
Z_min/Location -0.586/-21.7333°Lat 19.8°Lon
Z_max/Location 3.849/ -16.6333°Lat 19.7333°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Lithospheric temperature gradient
Okavango Basin location map
Statistics - Lithospheric temperature gradient
Median 6.308
Mean 6.378
Scale 1.771
stdev 1.093
Z_min/Location 5.071/-14.6333°Lat 18.6°Lon
Z_max/Location 8.159/ -14.0°Lat 26.0°Lon

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Computations

Isostatic correction
Okavango Basin location map
Statistics - Isostatic correction
Median 0.466
Mean 0.490
Scale 0.367
stdev 0.293
Z_min/Location 0.000/-20.6°Lat 21.6333°Lon
Z_max/Location 1.517/-16.6333°Lat 19.7333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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TTS (sediment)
Okavango Basin location map
Statistics - TTS (sediment)
Median -0.364
Mean -0.309
Scale 0.642
stdev 0.800
Z_min/Location -1.855/-13.3667°Lat 17.8333°Lon
Z_max/Location 2.169/-21.8667°Lat 20.1667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Beta (Sediment)
Okavango Basin location map
Statistics - Beta (Sediment)
Median 0.956
Mean 0.972
Scale 0.075
stdev 0.104
Z_min/Location 0.808/-13.3667°Lat 17.8333°Lon
Z_max/Location 1.384/-21.8667°Lat 20.1667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Crustal vs lithosph. extn.
Okavango Basin location map
Statistics - Crustal vs lithosph. extn.
Median 0.043
Mean 0.038
Scale 0.355
stdev 0.238
Z_min/Location -0.342/-17.0°Lat 23.0°Lon
Z_max/Location 0.364/-16.2667°Lat 19.2333°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Anomalous TTS
Okavango Basin location map
Statistics - Anomalous TTS
Median 0.172
Mean -0.063
Scale 0.986
stdev 0.984
Z_min/Location -2.625/-21.1667°Lat 17.5333°Lon
Z_max/Location 1.754/-21.8667°Lat 20.1667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Predicted elevation
Okavango Basin location map
Statistics - Predicted elevation
Median 1086.400
Mean 965.575
Scale 933.730
stdev 659.698
Z_min/Location 8.321/-11.5667°Lat 21.6667°Lon
Z_max/Location 1853.150/-17.0°Lat 23.0°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Beta (Crust)
Okavango Basin location map
Statistics - Beta (Crust)
Median 0.972
Mean 0.975
Scale 0.096
stdev 0.075
Z_min/Location 0.858/-14.7°Lat 22.8°Lon
Z_max/Location 1.180/-21.2333°Lat 16.2°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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TTS (crust)
Okavango Basin location map
Statistics - TTS (crust)
Median -0.223
Mean -0.246
Scale 0.782
stdev 0.624
Z_min/Location -1.298/-14.7°Lat 22.8°Lon
Z_max/Location 1.192/-21.2333°Lat 16.2°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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Differential Beta
Okavango Basin location map
Statistics - Differential Beta
Median 0.021
Mean -0.003
Scale 0.116
stdev 0.122
Z_min/Location -0.309/-21.2°Lat 17.4333°Lon
Z_max/Location 0.328/-21.8667°Lat 20.1667°Lon

Comments

For explanation to the data source or computation of this grid please follow this link. Clicking the image will open a high-res PDF of the map. Units in the statistics table are same as map units. Z_min and Z_max refer to the minima and maxima with their respective geographic locations.

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This basin data is based on interpolated global grids and might contain gridding errors or wrongly interpolated data values.

Page generated 2008-08-03 02:36:30 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia