ICONS atlas: AFR - Owambo Basin

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Overview

This page bundles the available data for the Owambo 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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Owambo Basin location map
Basin name Owambo Basin
Region code AFR
Basin ID 7340
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.

Owambo Basin cross section
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Dynamic topography evolution for basin centroid
Owambo 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
Owambo Basin location map
Statistics - Mantle Lid thickness
Median 159.965
Mean 158.969
Scale 2.088
stdev 3.394
Z_min/Location 140.798/-17.8333°Lat 20.1667°Lon
Z_max/Location 164.876/ -19.9°Lat 13.9667°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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Depth of 550 deg isotherm
Owambo Basin location map
Statistics - Depth of 550 deg isotherm
Median -52.911
Mean -52.339
Scale 0.132
stdev 1.120
Z_min/Location -53.001/-15.4667°Lat 15.2667°Lon
Z_max/Location -47.230/ -17.9667°Lat 20.1333°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
Owambo Basin location map
Statistics - Mobil isopachs
Median 0.796
Mean 0.789
Scale 0.662
stdev 0.667
Z_min/Location -0.898/-17.9°Lat 13.1667°Lon
Z_max/Location 2.254/ -17.2°Lat 20.1333°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
Owambo Basin location map
Statistics - Plain crustal thickness
Median 36.791
Mean 37.591
Scale 0.527
stdev 2.157
Z_min/Location 29.539/-19.9°Lat 13.7333°Lon
Z_max/Location 44.441/ -17.4667°Lat 14.2667°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
Owambo Basin location map
Statistics - Base middle crust
Median -25.806
Mean -25.996
Scale 1.415
stdev 1.399
Z_min/Location -29.999/-17.4667°Lat 14.2333°Lon
Z_max/Location -22.128/ -19.9°Lat 13.7333°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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Base lower crust
Owambo Basin location map
Statistics - Base lower crust
Median -37.800
Mean -38.029
Scale 1.802
stdev 1.917
Z_min/Location -43.410/-17.4667°Lat 14.2667°Lon
Z_max/Location -31.979/ -19.9°Lat 13.7333°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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Total crustal thickness
Owambo Basin location map
Statistics - Total crustal thickness
Median 38.893
Mean 39.090
Scale 1.752
stdev 1.943
Z_min/Location 31.590/-19.9°Lat 13.7333°Lon
Z_max/Location 44.366/ -17.4667°Lat 14.3°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
Owambo Basin location map
Statistics - Base upper crust
Median -13.698
Mean -13.524
Scale 1.011
stdev 1.074
Z_min/Location -15.505/-16.0667°Lat 18.6°Lon
Z_max/Location -10.791/ -19.7°Lat 17.5333°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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Thermal lithospheric thickness
Owambo Basin location map
Statistics - Thermal lithospheric thickness
Median 199.857
Mean 198.059
Scale 0.213
stdev 3.682
Z_min/Location 180.030/-18.3667°Lat 20.0°Lon
Z_max/Location 200.006/ -15.4°Lat 15.1667°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
Owambo Basin location map
Statistics - Heatflow
Median 57.193
Mean 57.558
Scale 1.811
stdev 1.846
Z_min/Location 54.079/-19.7°Lat 17.9333°Lon
Z_max/Location 63.717/ -19.6°Lat 13.5333°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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Topography (ETOPO2)
Owambo Basin location map
Statistics - Topography (ETOPO2)
Median 1145.000
Mean 1159.710
Scale 54.856
stdev 102.280
Z_min/Location 538.000/-19.0667°Lat 13.5°Lon
Z_max/Location 1953.000/ -19.5667°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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Base hard sediments
Owambo Basin location map
Statistics - Base hard sediments
Median -0.276
Mean -0.439
Scale 1.206
stdev 1.046
Z_min/Location -2.629/-16.1667°Lat 18.9°Lon
Z_max/Location 1.362/ -19.8333°Lat 16.7333°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
Owambo Basin location map
Statistics - Temperature at 50km depth
Median 539.456
Mean 544.152
Scale 0.678
stdev 9.644
Z_min/Location 538.986/-15.4°Lat 15.1667°Lon
Z_max/Location 591.338/ -18.3667°Lat 20.0°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
Owambo Basin location map
Statistics - Laske sediment thickness
Median 1.745
Mean 2.146
Scale 2.128
stdev 1.736
Z_min/Location -0.052/-17.8333°Lat 13.2667°Lon
Z_max/Location 5.816/ -17.1667°Lat 18.5°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
Owambo Basin location map
Statistics - Lithospheric temperature gradient
Median 5.077
Mean 5.139
Scale 0.009
stdev 0.125
Z_min/Location 5.071/-15.4°Lat 15.1667°Lon
Z_max/Location 5.665/ -18.3667°Lat 20.0°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
Owambo Basin location map
Statistics - Isostatic correction
Median 0.726
Mean 0.853
Scale 0.867
stdev 0.663
Z_min/Location 0.000/-17.6°Lat 13.5333°Lon
Z_max/Location 2.174/-17.1667°Lat 18.5°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)
Owambo Basin location map
Statistics - TTS (sediment)
Median -0.650
Mean -0.414
Scale 0.663
stdev 0.800
Z_min/Location -1.729/-17.7°Lat 16.0°Lon
Z_max/Location 2.004/-19.9°Lat 13.7333°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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Beta (Sediment)
Owambo Basin location map
Statistics - Beta (Sediment)
Median 0.923
Mean 0.960
Scale 0.070
stdev 0.104
Z_min/Location 0.819/-17.7°Lat 16.0°Lon
Z_max/Location 1.345/-19.9°Lat 13.7333°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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Crustal vs lithosph. extn.
Owambo Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.002
Mean -0.021
Scale 0.022
stdev 0.052
Z_min/Location -0.166/-17.4667°Lat 14.2667°Lon
Z_max/Location 0.227/-19.9°Lat 13.7333°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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Anomalous TTS
Owambo Basin location map
Statistics - Anomalous TTS
Median -0.358
Mean -0.294
Scale 0.876
stdev 0.769
Z_min/Location -1.746/-17.7°Lat 16.0667°Lon
Z_max/Location 1.806/-15.9667°Lat 18.2667°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
Owambo Basin location map
Statistics - Predicted elevation
Median 65.300
Mean 77.645
Scale 118.349
stdev 128.198
Z_min/Location -519.636/-19.9°Lat 13.7333°Lon
Z_max/Location 472.948/-17.5667°Lat 20.2°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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Beta (Crust)
Owambo Basin location map
Statistics - Beta (Crust)
Median 1.006
Mean 0.988
Scale 0.015
stdev 0.054
Z_min/Location 0.833/-17.4667°Lat 14.2667°Lon
Z_max/Location 1.253/-19.9°Lat 13.7333°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 (crust)
Owambo Basin location map
Statistics - TTS (crust)
Median 0.049
Mean -0.120
Scale 0.111
stdev 0.456
Z_min/Location -1.567/-17.4667°Lat 14.2667°Lon
Z_max/Location 1.580/-19.9°Lat 13.7333°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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Differential Beta
Owambo Basin location map
Statistics - Differential Beta
Median -0.043
Mean -0.028
Scale 0.101
stdev 0.097
Z_min/Location -0.184/-17.6667°Lat 16.1°Lon
Z_max/Location 0.292/-16.0°Lat 18.3667°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