ICONS atlas: AFR - Mekele Basin

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Overview

This page bundles the available data for the Mekele 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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Mekele Basin location map
Basin name Mekele Basin
Region code AFR
Basin ID 7050
No. of rings 1
Basin size [km²] 89699.0
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.

Mekele Basin cross section
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Dynamic topography evolution for basin centroid
Mekele 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
Mekele Basin location map
Statistics - Mantle Lid thickness
Median 93.287
Mean 92.576
Scale 3.636
stdev 3.210
Z_min/Location 81.729/13.6333°Lat 40.0°Lon
Z_max/Location 97.032/ 13.8333°Lat 37.7333°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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Depth of 550 deg isotherm
Mekele Basin location map
Statistics - Depth of 550 deg isotherm
Median -38.356
Mean -38.197
Scale 0.522
stdev 0.654
Z_min/Location -39.000/14.0°Lat 36.0°Lon
Z_max/Location -35.101/ 13.6333°Lat 40.0°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
Mekele Basin location map
Statistics - Mobil isopachs
Median 0.148
Mean 0.188
Scale 0.238
stdev 0.260
Z_min/Location -0.346/13.5667°Lat 38.3333°Lon
Z_max/Location 1.014/ 12.1333°Lat 36.3°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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Plain crustal thickness
Mekele Basin location map
Statistics - Plain crustal thickness
Median 31.091
Mean 31.530
Scale 1.282
stdev 1.315
Z_min/Location 29.733/15.0°Lat 36.4667°Lon
Z_max/Location 35.627/ 13.8°Lat 35.0333°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
Mekele Basin location map
Statistics - Base middle crust
Median -19.226
Mean -19.586
Scale 1.353
stdev 1.290
Z_min/Location -23.355/14.0333°Lat 35.0333°Lon
Z_max/Location -17.825/ 13.0333°Lat 37.4333°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 lower crust
Mekele Basin location map
Statistics - Base lower crust
Median -30.078
Mean -30.462
Scale 1.430
stdev 1.425
Z_min/Location -35.801/14.0333°Lat 35.0333°Lon
Z_max/Location -28.647/ 12.9667°Lat 37.0667°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
Mekele Basin location map
Statistics - Total crustal thickness
Median 31.206
Mean 31.709
Scale 1.406
stdev 1.468
Z_min/Location 29.699/15.0°Lat 36.5°Lon
Z_max/Location 36.213/ 13.8°Lat 35.0333°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 upper crust
Mekele Basin location map
Statistics - Base upper crust
Median -9.231
Mean -9.383
Scale 0.982
stdev 0.858
Z_min/Location -11.500/14.0667°Lat 35.0333°Lon
Z_max/Location -8.007/ 12.7°Lat 38.0°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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Thermal lithospheric thickness
Mekele Basin location map
Statistics - Thermal lithospheric thickness
Median 125.007
Mean 124.285
Scale 2.406
stdev 2.552
Z_min/Location 115.123/13.6333°Lat 40.0°Lon
Z_max/Location 128.000/ 13.0°Lat 39.0°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
Mekele Basin location map
Statistics - Heatflow
Median 96.378
Mean 106.368
Scale 2.601
stdev 19.765
Z_min/Location 86.746/15.0°Lat 36.0333°Lon
Z_max/Location 158.788/ 12.7333°Lat 40.0667°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)
Mekele Basin location map
Statistics - Topography (ETOPO2)
Median 897.000
Mean 1161.850
Scale 524.840
stdev 698.828
Z_min/Location 398.000/12.8°Lat 40.1333°Lon
Z_max/Location 4411.000/ 13.2333°Lat 38.3333°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
Mekele Basin location map
Statistics - Base hard sediments
Median 1.049
Mean 1.068
Scale 0.778
stdev 0.592
Z_min/Location -0.188/14.1333°Lat 35.0333°Lon
Z_max/Location 1.993/ 12.3667°Lat 38.5333°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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Temperature at 50km depth
Mekele Basin location map
Statistics - Temperature at 50km depth
Median 726.913
Mean 730.609
Scale 9.890
stdev 13.709
Z_min/Location 713.000/13.0°Lat 39.0°Lon
Z_max/Location 806.272/ 13.6333°Lat 40.0°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
Mekele Basin location map
Statistics - Laske sediment thickness
Median 0.048
Mean 0.078
Scale 0.066
stdev 0.087
Z_min/Location -0.038/11.3°Lat 35.7°Lon
Z_max/Location 0.337/ 13.3333°Lat 40.1333°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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Lithospheric temperature gradient
Mekele Basin location map
Statistics - Lithospheric temperature gradient
Median 7.745
Mean 7.783
Scale 0.124
stdev 0.176
Z_min/Location 7.530/14.8°Lat 36.6667°Lon
Z_max/Location 8.860/ 13.6333°Lat 40.0°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)
Mekele Basin location map
Statistics - Beta (Crust)
Median 1.009
Mean 0.996
Scale 0.042
stdev 0.041
Z_min/Location 0.880/13.8°Lat 35.0333°Lon
Z_max/Location 1.055/15.0°Lat 36.4667°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
Mekele Basin location map
Statistics - Isostatic correction
Median 0.021
Mean 0.034
Scale 0.029
stdev 0.037
Z_min/Location 0.000/14.1°Lat 36.2°Lon
Z_max/Location 0.145/13.3333°Lat 40.1333°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)
Mekele Basin location map
Statistics - TTS (crust)
Median 0.067
Mean -0.042
Scale 0.320
stdev 0.328
Z_min/Location -1.064/13.8°Lat 35.0333°Lon
Z_max/Location 0.406/15.0°Lat 36.4667°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)
Mekele Basin location map
Statistics - TTS (sediment)
Median -1.053
Mean -1.103
Scale 0.818
stdev 0.595
Z_min/Location -2.021/12.3667°Lat 38.6°Lon
Z_max/Location 0.065/14.1333°Lat 35.0333°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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Beta (Sediment)
Mekele Basin location map
Statistics - Beta (Sediment)
Median 0.881
Mean 0.880
Scale 0.080
stdev 0.059
Z_min/Location 0.795/12.3667°Lat 38.6°Lon
Z_max/Location 1.008/14.1333°Lat 35.0333°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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Differential Beta
Mekele Basin location map
Statistics - Differential Beta
Median -0.125
Mean -0.116
Scale 0.061
stdev 0.070
Z_min/Location -0.220/12.6333°Lat 38.0667°Lon
Z_max/Location 0.128/14.1333°Lat 35.0333°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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Crustal vs lithosph. extn.
Mekele Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.001
Mean -0.008
Scale 0.062
stdev 0.049
Z_min/Location -0.136/13.8°Lat 35.0333°Lon
Z_max/Location 0.062/15.0°Lat 36.5°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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Anomalous TTS
Mekele Basin location map
Statistics - Anomalous TTS
Median -1.143
Mean -1.061
Scale 0.609
stdev 0.659
Z_min/Location -2.107/12.5667°Lat 38.1333°Lon
Z_max/Location 1.123/14.1333°Lat 35.0333°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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Predicted elevation
Mekele Basin location map
Statistics - Predicted elevation
Median 708.012
Mean 738.197
Scale 193.931
stdev 166.709
Z_min/Location 505.111/15.0°Lat 36.5°Lon
Z_max/Location 1175.380/13.8°Lat 35.0333°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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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