ICONS atlas: AFR - Illizi Basin

Regional basin list

To view the data for individual basins, select a basin from the dropdown menu below or click the basin name in the overview table. This will open a separate page with detailed maps.

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Overview

This page bundles the available data for the Illizi 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.

Select data to display:

Illizi Basin location map
Basin name Illizi Basin
Region code AFR
Basin ID 7230
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.

Illizi Basin cross section
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Dynamic topography evolution for basin centroid
Illizi 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
Illizi Basin location map
Statistics - Mantle Lid thickness
Median 130.258
Mean 128.086
Scale 23.165
stdev 19.207
Z_min/Location 88.907/29.1333°Lat 6.6°Lon
Z_max/Location 160.074/ 25.0°Lat 9.0°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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Depth of 550 deg isotherm
Illizi Basin location map
Statistics - Depth of 550 deg isotherm
Median -46.272
Mean -45.960
Scale 4.278
stdev 3.580
Z_min/Location -53.000/25.0°Lat 9.0°Lon
Z_max/Location -39.207/ 29.1333°Lat 6.6°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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Mobil isopachs
Illizi Basin location map
Statistics - Mobil isopachs
Median 1.645
Mean 1.777
Scale 0.926
stdev 0.828
Z_min/Location 0.189/24.3667°Lat 9.36667°Lon
Z_max/Location 3.660/ 29.1333°Lat 8.63333°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
Illizi Basin location map
Statistics - Plain crustal thickness
Median 38.768
Mean 38.958
Scale 0.831
stdev 0.723
Z_min/Location 37.953/28.0333°Lat 10.1333°Lon
Z_max/Location 40.441/ 26.3°Lat 11.0333°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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Base middle crust
Illizi Basin location map
Statistics - Base middle crust
Median -25.968
Mean -26.058
Scale 0.695
stdev 0.539
Z_min/Location -26.997/24.3667°Lat 9.46667°Lon
Z_max/Location -25.344/ 27.9°Lat 8.0°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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Base lower crust
Illizi Basin location map
Statistics - Base lower crust
Median -38.656
Mean -38.726
Scale 0.292
stdev 0.381
Z_min/Location -40.312/29.1333°Lat 6.6°Lon
Z_max/Location -38.229/ 27.6667°Lat 10.3667°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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Total crustal thickness
Illizi Basin location map
Statistics - Total crustal thickness
Median 39.555
Mean 39.575
Scale 0.523
stdev 0.400
Z_min/Location 38.903/27.7667°Lat 10.3°Lon
Z_max/Location 40.966/ 26.3333°Lat 11.1°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
Illizi Basin location map
Statistics - Base upper crust
Median -13.106
Mean -13.188
Scale 0.378
stdev 0.340
Z_min/Location -14.141/29.1333°Lat 6.6°Lon
Z_max/Location -12.752/ 25.1667°Lat 8.13333°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
Illizi Basin location map
Statistics - Thermal lithospheric thickness
Median 169.469
Mean 167.661
Scale 23.687
stdev 19.297
Z_min/Location 129.710/29.1333°Lat 6.6°Lon
Z_max/Location 200.000/ 25.0°Lat 9.0°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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Heatflow
Illizi Basin location map
Statistics - Heatflow
Median 71.220
Mean 69.844
Scale 1.883
stdev 3.188
Z_min/Location 61.016/28.5333°Lat 6.06667°Lon
Z_max/Location 75.043/ 27.7667°Lat 10.3°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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Topography (ETOPO2)
Illizi Basin location map
Statistics - Topography (ETOPO2)
Median 553.000
Mean 650.082
Scale 112.678
stdev 296.130
Z_min/Location 271.000/29.1°Lat 7.5°Lon
Z_max/Location 1874.000/ 25.2°Lat 8.1°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 hard sediments
Illizi Basin location map
Statistics - Base hard sediments
Median 0.205
Mean 0.233
Scale 1.018
stdev 0.733
Z_min/Location -0.951/29.1333°Lat 7.8°Lon
Z_max/Location 1.360/ 25.4667°Lat 9.1°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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Temperature at 50km depth
Illizi Basin location map
Statistics - Temperature at 50km depth
Median 603.474
Mean 611.721
Scale 57.384
stdev 47.917
Z_min/Location 539.000/25.0°Lat 9.0°Lon
Z_max/Location 713.081/ 29.1333°Lat 6.6°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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Laske sediment thickness
Illizi Basin location map
Statistics - Laske sediment thickness
Median 0.882
Mean 1.042
Scale 0.532
stdev 0.591
Z_min/Location -0.029/24.9333°Lat 8.8°Lon
Z_max/Location 2.480/ 29.1333°Lat 8.86667°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
Illizi Basin location map
Statistics - Lithospheric temperature gradient
Median 5.914
Mean 6.006
Scale 0.771
stdev 0.587
Z_min/Location 5.071/25.0°Lat 9.0°Lon
Z_max/Location 7.285/ 29.1333°Lat 6.6°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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Computations

Isostatic correction
Illizi Basin location map
Statistics - Isostatic correction
Median 0.375
Mean 0.438
Scale 0.221
stdev 0.242
Z_min/Location 0.000/25.0333°Lat 8.43333°Lon
Z_max/Location 1.013/29.1333°Lat 8.86667°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)
Illizi Basin location map
Statistics - TTS (sediment)
Median -0.647
Mean -0.670
Scale 0.740
stdev 0.529
Z_min/Location -1.502/25.8333°Lat 9.2°Lon
Z_max/Location 0.367/28.6667°Lat 6.13333°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)
Illizi Basin location map
Statistics - Beta (Sediment)
Median 0.924
Mean 0.925
Scale 0.082
stdev 0.058
Z_min/Location 0.839/25.8333°Lat 9.2°Lon
Z_max/Location 1.049/28.6667°Lat 6.13333°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.
Illizi Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.038
Mean -0.073
Scale 0.113
stdev 0.117
Z_min/Location -0.386/29.1333°Lat 6.6°Lon
Z_max/Location 0.089/24.3667°Lat 9.36667°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
Illizi Basin location map
Statistics - Anomalous TTS
Median -0.900
Mean -0.864
Scale 0.554
stdev 0.416
Z_min/Location -1.495/25.9°Lat 9.2°Lon
Z_max/Location 0.129/28.8°Lat 6.26667°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
Illizi Basin location map
Statistics - Predicted elevation
Median 618.156
Mean 669.044
Scale 392.413
stdev 338.087
Z_min/Location 106.224/25.0°Lat 9.0°Lon
Z_max/Location 1397.710/29.1333°Lat 6.6°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)
Illizi Basin location map
Statistics - Beta (Crust)
Median 1.030
Mean 1.026
Scale 0.022
stdev 0.019
Z_min/Location 0.988/26.3°Lat 11.0333°Lon
Z_max/Location 1.053/28.0333°Lat 10.1333°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)
Illizi Basin location map
Statistics - TTS (crust)
Median 0.231
Mean 0.194
Scale 0.163
stdev 0.141
Z_min/Location -0.096/26.3°Lat 11.0333°Lon
Z_max/Location 0.391/28.0333°Lat 10.1333°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
Illizi Basin location map
Statistics - Differential Beta
Median -0.110
Mean -0.101
Scale 0.049
stdev 0.043
Z_min/Location -0.160/25.9333°Lat 9.2°Lon
Z_max/Location 0.018/28.8°Lat 6.26667°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