ICONS atlas: AFR - Selous Basin

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Overview

This page bundles the available data for the Selous 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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Selous Basin location map
Basin name Selous Basin
Region code AFR
Basin ID 7560
No. of rings 1
Basin size [km²] 71479.8
Plate location/code /
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.

Selous Basin cross section
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Dynamic topography evolution for basin centroid
Selous 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
Selous Basin location map
Statistics - Mantle Lid thickness
Median 78.990
Mean 76.920
Scale 2.061
stdev 6.512
Z_min/Location 45.625/-12.0°Lat 35.0°Lon
Z_max/Location 83.112/ -9.56667°Lat 36.3667°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
Selous Basin location map
Statistics - Depth of 550 deg isotherm
Median -36.984
Mean -35.985
Scale 0.154
stdev 2.035
Z_min/Location -37.382/-8.46667°Lat 36.8333°Lon
Z_max/Location -28.000/ -12.0°Lat 35.0°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
Selous Basin location map
Statistics - Mobil isopachs
Median 1.028
Mean 1.143
Scale 0.615
stdev 0.635
Z_min/Location -0.281/-11.7°Lat 36.1°Lon
Z_max/Location 2.306/ -8.33333°Lat 37.0333°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
Selous Basin location map
Statistics - Plain crustal thickness
Median 37.038
Mean 36.538
Scale 2.921
stdev 2.556
Z_min/Location 32.169/-11.0°Lat 35.9333°Lon
Z_max/Location 41.765/ -11.2°Lat 37.8°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
Selous Basin location map
Statistics - Base middle crust
Median -25.225
Mean -24.868
Scale 2.070
stdev 1.711
Z_min/Location -28.262/-11.3°Lat 37.7667°Lon
Z_max/Location -21.968/ -11.1333°Lat 35.8333°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
Selous Basin location map
Statistics - Base lower crust
Median -37.260
Mean -36.660
Scale 3.428
stdev 2.820
Z_min/Location -41.893/-10.3°Lat 38.1°Lon
Z_max/Location -31.864/ -11.0°Lat 35.9333°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
Selous Basin location map
Statistics - Total crustal thickness
Median 38.009
Mean 37.378
Scale 3.295
stdev 2.758
Z_min/Location 32.645/-10.9333°Lat 35.9667°Lon
Z_max/Location 42.499/ -10.3°Lat 38.1°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
Selous Basin location map
Statistics - Base upper crust
Median -12.796
Mean -12.760
Scale 0.938
stdev 0.749
Z_min/Location -14.613/-8.63333°Lat 38.3°Lon
Z_max/Location -11.619/ -11.0°Lat 35.9333°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
Selous Basin location map
Statistics - Thermal lithospheric thickness
Median 117.983
Mean 114.298
Scale 0.740
stdev 7.797
Z_min/Location 81.000/-12.0°Lat 35.0°Lon
Z_max/Location 120.781/ -11.4333°Lat 37.4°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
Selous Basin location map
Statistics - Heatflow
Median 59.416
Mean 59.377
Scale 1.008
stdev 0.818
Z_min/Location 57.404/-8.0°Lat 37.1333°Lon
Z_max/Location 60.879/ -9.96667°Lat 38.1°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)
Selous Basin location map
Statistics - Topography (ETOPO2)
Median 612.000
Mean 607.423
Scale 182.360
stdev 195.592
Z_min/Location 89.000/-7.9°Lat 37.7667°Lon
Z_max/Location 1155.000/ -11.1°Lat 36.4°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
Selous Basin location map
Statistics - Base hard sediments
Median 0.049
Mean -0.121
Scale 0.368
stdev 0.450
Z_min/Location -1.611/-8.63333°Lat 38.3°Lon
Z_max/Location 0.390/ -11.4333°Lat 37.4°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
Selous Basin location map
Statistics - Temperature at 50km depth
Median 753.820
Mean 780.348
Scale 3.682
stdev 55.069
Z_min/Location 745.290/-11.4°Lat 37.4667°Lon
Z_max/Location 1010.000/ -12.0°Lat 35.0°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
Selous Basin location map
Statistics - Laske sediment thickness
Median 1.603
Mean 1.619
Scale 1.407
stdev 0.980
Z_min/Location 0.182/-11.5667°Lat 36.2°Lon
Z_max/Location 3.264/ -8.63333°Lat 38.0333°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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Lithospheric temperature gradient
Selous Basin location map
Statistics - Lithospheric temperature gradient
Median 8.048
Mean 8.091
Scale 0.080
stdev 0.442
Z_min/Location 6.078/-12.6667°Lat 34.9°Lon
Z_max/Location 9.475/ -11.0°Lat 36.0°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

Beta (Crust)
Selous Basin location map
Statistics - Beta (Crust)
Median 1.006
Mean 1.025
Scale 0.079
stdev 0.073
Z_min/Location 0.892/-11.2°Lat 37.8°Lon
Z_max/Location 1.158/-11.0°Lat 35.9333°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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Isostatic correction
Selous Basin location map
Statistics - Isostatic correction
Median 0.669
Mean 0.666
Scale 0.568
stdev 0.392
Z_min/Location 0.079/-11.5667°Lat 36.2°Lon
Z_max/Location 1.307/-8.63333°Lat 38.0333°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)
Selous Basin location map
Statistics - TTS (crust)
Median 0.047
Mean 0.152
Scale 0.613
stdev 0.536
Z_min/Location -0.945/-11.2°Lat 37.8°Lon
Z_max/Location 1.069/-11.0°Lat 35.9333°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)
Selous Basin location map
Statistics - TTS (sediment)
Median -0.542
Mean -0.545
Scale 0.249
stdev 0.324
Z_min/Location -1.190/-10.0333°Lat 37.0°Lon
Z_max/Location 0.599/-8.96667°Lat 38.3667°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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Beta (Sediment)
Selous Basin location map
Statistics - Beta (Sediment)
Median 0.935
Mean 0.936
Scale 0.028
stdev 0.037
Z_min/Location 0.868/-10.0333°Lat 37.0°Lon
Z_max/Location 1.083/-8.96667°Lat 38.3667°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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Differential Beta
Selous Basin location map
Statistics - Differential Beta
Median -0.086
Mean -0.089
Scale 0.116
stdev 0.081
Z_min/Location -0.206/-11.0°Lat 35.9333°Lon
Z_max/Location 0.135/-9.0°Lat 38.3667°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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Crustal vs lithosph. extn.
Selous Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.002
Mean -0.013
Scale 0.061
stdev 0.073
Z_min/Location -0.380/-12.0°Lat 35.0°Lon
Z_max/Location 0.112/-9.8°Lat 36.1667°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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Anomalous TTS
Selous Basin location map
Statistics - Anomalous TTS
Median -0.740
Mean -0.697
Scale 0.900
stdev 0.618
Z_min/Location -1.581/-10.0667°Lat 36.6°Lon
Z_max/Location 1.036/-9.03333°Lat 38.3667°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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Predicted elevation
Selous Basin location map
Statistics - Predicted elevation
Median 1430.390
Mean 1403.090
Scale 179.979
stdev 166.190
Z_min/Location 1055.740/-10.0333°Lat 36.1°Lon
Z_max/Location 1847.160/-12.0°Lat 35.0°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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This basin data is based on interpolated global grids and might contain gridding errors or wrongly interpolated data values.

Page generated 2007-09-30 21:53:47 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia