ICONS atlas: AFR - Kem Kem Basin

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Overview

This page bundles the available data for the Kem Kem 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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Kem Kem Basin location map
Basin name Kem Kem Basin
Region code AFR
Basin ID 7130
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.

Kem Kem Basin cross section
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Dynamic topography evolution for basin centroid
Kem Kem 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
Kem Kem Basin location map
Statistics - Mantle Lid thickness
Median 61.733
Mean 61.865
Scale 0.304
stdev 0.380
Z_min/Location 61.429/30.7333°Lat -4.03333°Lon
Z_max/Location 62.906/ 29.8333°Lat -4.46667°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
Kem Kem Basin location map
Statistics - Depth of 550 deg isotherm
Median -34.032
Mean -34.060
Scale 0.023
stdev 0.057
Z_min/Location -34.246/29.8333°Lat -4.5°Lon
Z_max/Location -34.000/ 30.0°Lat -5.0°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
Kem Kem Basin location map
Statistics - Mobil isopachs
Median 2.129
Mean 2.353
Scale 0.951
stdev 0.862
Z_min/Location 1.210/30.1667°Lat -4.33333°Lon
Z_max/Location 4.071/ 30.5°Lat -4.76667°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
Kem Kem Basin location map
Statistics - Plain crustal thickness
Median 38.392
Mean 38.410
Scale 0.360
stdev 0.302
Z_min/Location 37.818/30.4333°Lat -5.0°Lon
Z_max/Location 39.038/ 29.9333°Lat -4.0°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 middle crust
Kem Kem Basin location map
Statistics - Base middle crust
Median -27.261
Mean -27.194
Scale 0.313
stdev 0.286
Z_min/Location -27.574/29.8333°Lat -5.26667°Lon
Z_max/Location -26.360/ 30.7667°Lat -4.13333°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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Base lower crust
Kem Kem Basin location map
Statistics - Base lower crust
Median -40.118
Mean -40.012
Scale 0.524
stdev 0.471
Z_min/Location -40.646/29.8333°Lat -5.26667°Lon
Z_max/Location -38.660/ 30.7667°Lat -4.13333°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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Total crustal thickness
Kem Kem Basin location map
Statistics - Total crustal thickness
Median 40.694
Mean 40.596
Scale 0.453
stdev 0.419
Z_min/Location 39.362/30.7667°Lat -4.13333°Lon
Z_max/Location 41.145/ 29.8333°Lat -5.26667°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
Kem Kem Basin location map
Statistics - Base upper crust
Median -14.358
Mean -14.297
Scale 0.362
stdev 0.345
Z_min/Location -14.939/29.8333°Lat -5.26667°Lon
Z_max/Location -13.341/ 30.7667°Lat -4.13333°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
Kem Kem Basin location map
Statistics - Thermal lithospheric thickness
Median 102.425
Mean 102.461
Scale 0.895
stdev 0.764
Z_min/Location 100.797/30.7667°Lat -4.06667°Lon
Z_max/Location 104.001/ 29.8333°Lat -4.5°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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Heatflow
Kem Kem Basin location map
Statistics - Heatflow
Median 66.354
Mean 66.308
Scale 0.992
stdev 0.818
Z_min/Location 64.519/29.8333°Lat -5.26667°Lon
Z_max/Location 67.838/ 30.7667°Lat -4.13333°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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Topography (ETOPO2)
Kem Kem Basin location map
Statistics - Topography (ETOPO2)
Median 663.000
Mean 663.239
Scale 117.125
stdev 95.625
Z_min/Location 496.000/30.0°Lat -4.33333°Lon
Z_max/Location 928.000/ 30.5333°Lat -4.76667°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
Kem Kem Basin location map
Statistics - Base hard sediments
Median -1.555
Mean -1.602
Scale 0.464
stdev 0.430
Z_min/Location -2.638/29.8333°Lat -5.26667°Lon
Z_max/Location -0.680/ 30.7667°Lat -4.13333°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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Temperature at 50km depth
Kem Kem Basin location map
Statistics - Temperature at 50km depth
Median 823.116
Mean 822.907
Scale 3.682
stdev 3.251
Z_min/Location 815.982/29.8333°Lat -4.5°Lon
Z_max/Location 829.775/ 30.7667°Lat -4.06667°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
Kem Kem Basin location map
Statistics - Laske sediment thickness
Median 0.401
Mean 0.507
Scale 0.322
stdev 0.359
Z_min/Location 0.099/30.6667°Lat -4.3°Lon
Z_max/Location 1.533/ 29.8333°Lat -5.1°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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Lithospheric temperature gradient
Kem Kem Basin location map
Statistics - Lithospheric temperature gradient
Median 8.976
Mean 8.987
Scale 0.107
stdev 0.087
Z_min/Location 8.849/30.0°Lat -5.0°Lon
Z_max/Location 9.205/ 30.7667°Lat -4.06667°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
Kem Kem Basin location map
Statistics - Isostatic correction
Median 0.173
Mean 0.216
Scale 0.138
stdev 0.151
Z_min/Location 0.043/30.6667°Lat -4.3°Lon
Z_max/Location 0.641/29.8333°Lat -5.1°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)
Kem Kem Basin location map
Statistics - TTS (sediment)
Median 1.357
Mean 1.386
Scale 0.296
stdev 0.306
Z_min/Location 0.622/30.7667°Lat -4.06667°Lon
Z_max/Location 2.099/30.0°Lat -5.2°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 (Sediment)
Kem Kem Basin location map
Statistics - Beta (Sediment)
Median 1.210
Mean 1.218
Scale 0.055
stdev 0.059
Z_min/Location 1.086/30.7667°Lat -4.06667°Lon
Z_max/Location 1.367/30.0°Lat -5.2°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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Crustal vs lithosph. extn.
Kem Kem Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.006
Mean -0.004
Scale 0.009
stdev 0.008
Z_min/Location -0.015/30.2°Lat -3.86667°Lon
Z_max/Location 0.021/29.8333°Lat -5.26667°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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Anomalous TTS
Kem Kem Basin location map
Statistics - Anomalous TTS
Median 1.462
Mean 1.443
Scale 0.278
stdev 0.294
Z_min/Location 0.590/30.7667°Lat -4.06667°Lon
Z_max/Location 2.063/30.0°Lat -5.2°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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Predicted elevation
Kem Kem Basin location map
Statistics - Predicted elevation
Median 1805.130
Mean 1798.980
Scale 10.289
stdev 15.007
Z_min/Location 1746.340/30.7667°Lat -4.13333°Lon
Z_max/Location 1816.160/30.0°Lat -5.0°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)
Kem Kem Basin location map
Statistics - Beta (Crust)
Median 0.993
Mean 0.993
Scale 0.009
stdev 0.008
Z_min/Location 0.977/29.9333°Lat -4.0°Lon
Z_max/Location 1.008/30.4333°Lat -5.0°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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TTS (crust)
Kem Kem Basin location map
Statistics - TTS (crust)
Median -0.053
Mean -0.057
Scale 0.074
stdev 0.062
Z_min/Location -0.186/29.9333°Lat -4.0°Lon
Z_max/Location 0.065/30.4333°Lat -5.0°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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Differential Beta
Kem Kem Basin location map
Statistics - Differential Beta
Median 0.223
Mean 0.225
Scale 0.053
stdev 0.057
Z_min/Location 0.082/30.7667°Lat -4.06667°Lon
Z_max/Location 0.362/30.0°Lat -5.2°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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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