ICONS atlas: AFR - Abbay (Blue Nile) Basin

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Overview

This page bundles the available data for the Abbay (Blue Nile) 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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Abbay (Blue Nile) Basin location map
Basin name Abbay (Blue Nile) Basin
Region code AFR
Basin ID 7510
No. of rings 1
Basin size [km²] 26996.4
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.

Abbay (Blue Nile) Basin cross section
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Dynamic topography evolution for basin centroid
Abbay (Blue Nile) 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
Abbay (Blue Nile) Basin location map
Statistics - Mantle Lid thickness
Median 83.232
Mean 81.838
Scale 7.281
stdev 6.218
Z_min/Location 64.574/9.4°Lat 38.6°Lon
Z_max/Location 89.263/ 9.16667°Lat 36.1333°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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Depth of 550 deg isotherm
Abbay (Blue Nile) Basin location map
Statistics - Depth of 550 deg isotherm
Median -36.460
Mean -35.900
Scale 1.382
stdev 1.593
Z_min/Location -38.000/10.0°Lat 37.0°Lon
Z_max/Location -31.446/ 9.46667°Lat 38.6667°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
Abbay (Blue Nile) Basin location map
Statistics - Mobil isopachs
Median 0.197
Mean 0.190
Scale 0.136
stdev 0.119
Z_min/Location -0.049/9.03333°Lat 36.2333°Lon
Z_max/Location 0.484/ 10.6°Lat 37.1667°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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Plain crustal thickness
Abbay (Blue Nile) Basin location map
Statistics - Plain crustal thickness
Median 33.639
Mean 33.086
Scale 1.078
stdev 1.243
Z_min/Location 30.782/9.16667°Lat 36.1333°Lon
Z_max/Location 34.528/ 9.86667°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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Base middle crust
Abbay (Blue Nile) Basin location map
Statistics - Base middle crust
Median -20.975
Mean -20.626
Scale 1.468
stdev 1.272
Z_min/Location -22.179/9.53333°Lat 37.9667°Lon
Z_max/Location -18.361/ 9.06667°Lat 36.2°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
Abbay (Blue Nile) Basin location map
Statistics - Base lower crust
Median -31.991
Mean -31.492
Scale 1.305
stdev 1.304
Z_min/Location -33.065/9.8°Lat 37.9667°Lon
Z_max/Location -29.230/ 9.03333°Lat 36.2333°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
Abbay (Blue Nile) Basin location map
Statistics - Total crustal thickness
Median 34.011
Mean 33.368
Scale 1.294
stdev 1.450
Z_min/Location 30.769/9.06667°Lat 36.2°Lon
Z_max/Location 35.043/ 9.83333°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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Base upper crust
Abbay (Blue Nile) Basin location map
Statistics - Base upper crust
Median -9.459
Mean -9.415
Scale 0.851
stdev 0.669
Z_min/Location -10.521/9.13333°Lat 37.9°Lon
Z_max/Location -8.347/ 9.26667°Lat 36.2667°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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Thermal lithospheric thickness
Abbay (Blue Nile) Basin location map
Statistics - Thermal lithospheric thickness
Median 117.417
Mean 115.207
Scale 3.625
stdev 5.184
Z_min/Location 98.764/9.43333°Lat 38.6333°Lon
Z_max/Location 121.000/ 10.0°Lat 37.0°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
Abbay (Blue Nile) Basin location map
Statistics - Heatflow
Median 100.057
Mean 101.783
Scale 1.883
stdev 4.652
Z_min/Location 96.614/9.03333°Lat 36.2333°Lon
Z_max/Location 118.099/ 10.2667°Lat 38.9667°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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Topography (ETOPO2)
Abbay (Blue Nile) Basin location map
Statistics - Topography (ETOPO2)
Median 1835.000
Mean 1849.750
Scale 428.471
stdev 390.380
Z_min/Location 939.000/9.93333°Lat 37.8667°Lon
Z_max/Location 3012.000/ 9.16667°Lat 36.7°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
Abbay (Blue Nile) Basin location map
Statistics - Base hard sediments
Median 1.610
Mean 1.594
Scale 0.132
stdev 0.110
Z_min/Location 1.377/9.0°Lat 37.7333°Lon
Z_max/Location 1.811/ 10.8333°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
Abbay (Blue Nile) Basin location map
Statistics - Temperature at 50km depth
Median 770.322
Mean 782.861
Scale 34.054
stdev 36.592
Z_min/Location 740.000/10.0°Lat 37.0°Lon
Z_max/Location 894.679/ 9.46667°Lat 38.6667°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
Abbay (Blue Nile) Basin location map
Statistics - Laske sediment thickness
Median 0.126
Mean 0.162
Scale 0.124
stdev 0.124
Z_min/Location 0.005/9.46667°Lat 36.0667°Lon
Z_max/Location 0.488/ 10.0°Lat 38.9°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
Abbay (Blue Nile) Basin location map
Statistics - Lithospheric temperature gradient
Median 8.302
Mean 8.400
Scale 0.425
stdev 0.394
Z_min/Location 7.907/9.16667°Lat 36.1333°Lon
Z_max/Location 9.772/ 10.0°Lat 38.9°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)
Abbay (Blue Nile) Basin location map
Statistics - Beta (Crust)
Median 0.984
Mean 1.002
Scale 0.031
stdev 0.038
Z_min/Location 0.958/9.86667°Lat 38.0°Lon
Z_max/Location 1.075/9.16667°Lat 36.1333°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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Isostatic correction
Abbay (Blue Nile) Basin location map
Statistics - Isostatic correction
Median 0.055
Mean 0.070
Scale 0.053
stdev 0.053
Z_min/Location 0.002/9.46667°Lat 36.0667°Lon
Z_max/Location 0.209/10.0°Lat 38.9°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)
Abbay (Blue Nile) Basin location map
Statistics - TTS (crust)
Median -0.130
Mean 0.001
Scale 0.255
stdev 0.294
Z_min/Location -0.340/9.86667°Lat 38.0°Lon
Z_max/Location 0.546/9.16667°Lat 36.1333°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 (sediment)
Abbay (Blue Nile) Basin location map
Statistics - TTS (sediment)
Median -1.666
Mean -1.664
Scale 0.115
stdev 0.121
Z_min/Location -1.994/10.2°Lat 38.9667°Lon
Z_max/Location -1.398/9.0°Lat 37.7333°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)
Abbay (Blue Nile) Basin location map
Statistics - Beta (Sediment)
Median 0.824
Mean 0.825
Scale 0.010
stdev 0.010
Z_min/Location 0.797/10.2°Lat 38.9667°Lon
Z_max/Location 0.848/9.0°Lat 37.7333°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
Abbay (Blue Nile) Basin location map
Statistics - Differential Beta
Median -0.169
Mean -0.177
Scale 0.051
stdev 0.041
Z_min/Location -0.245/9.66667°Lat 36.3333°Lon
Z_max/Location -0.123/9.5°Lat 37.9333°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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Crustal vs lithosph. extn.
Abbay (Blue Nile) Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.035
Mean -0.032
Scale 0.100
stdev 0.078
Z_min/Location -0.223/9.36667°Lat 38.5667°Lon
Z_max/Location 0.085/9.16667°Lat 36.1333°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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Anomalous TTS
Abbay (Blue Nile) Basin location map
Statistics - Anomalous TTS
Median -1.654
Mean -1.665
Scale 0.456
stdev 0.334
Z_min/Location -2.184/9.86667°Lat 36.4°Lon
Z_max/Location -1.187/9.36667°Lat 37.9333°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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Predicted elevation
Abbay (Blue Nile) Basin location map
Statistics - Predicted elevation
Median 1113.050
Mean 1069.520
Scale 271.132
stdev 218.613
Z_min/Location 724.104/9.16667°Lat 36.1333°Lon
Z_max/Location 1471.130/9.36667°Lat 38.5667°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