ICONS atlas: AFR - Bida Basin

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Overview

This page bundles the available data for the Bida 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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Bida Basin location map

Basin name	Bida Basin
Region code	AFR
Basin ID	7580
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.

Bida Basin cross section

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Dynamic topography evolution for basin centroid

Bida 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

Bida Basin location map

Statistics - Mantle Lid thickness
Median	139.807
Mean	136.903
Scale	14.864
stdev	14.212
Z_min/Location	99.106/7.6°Lat 6.83333°Lon
Z_max/Location	157.549/ 9.93333°Lat 5.76667°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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Depth of 550 deg isotherm

Bida Basin location map

Statistics - Depth of 550 deg isotherm
Median	-47.403
Mean	-46.929
Scale	2.833
stdev	2.700
Z_min/Location	-51.517/9.9°Lat 5.8°Lon
Z_max/Location	-39.886/ 7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Mobil isopachs
Median	0.391
Mean	0.455
Scale	0.669
stdev	0.531
Z_min/Location	-0.628/8.6°Lat 7.2°Lon
Z_max/Location	1.618/ 7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Plain crustal thickness
Median	38.055
Mean	38.502
Scale	1.322
stdev	1.443
Z_min/Location	35.100/7.6°Lat 6.83333°Lon
Z_max/Location	41.696/ 10.0667°Lat 4.56667°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

Bida Basin location map

Statistics - Base middle crust
Median	-26.168
Mean	-26.544
Scale	0.755
stdev	0.926
Z_min/Location	-28.859/10.0667°Lat 4.56667°Lon
Z_max/Location	-25.336/ 9.23333°Lat 6.53333°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

Bida Basin location map

Statistics - Base lower crust
Median	-38.427
Mean	-38.918
Scale	0.970
stdev	1.196
Z_min/Location	-41.643/9.46667°Lat 4.73333°Lon
Z_max/Location	-37.378/ 9.23333°Lat 6.53333°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

Bida Basin location map

Statistics - Total crustal thickness
Median	38.701
Mean	39.190
Scale	0.997
stdev	1.216
Z_min/Location	37.645/9.23333°Lat 6.53333°Lon
Z_max/Location	41.953/ 9.46667°Lat 4.73333°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

Bida Basin location map

Statistics - Base upper crust
Median	-13.861
Mean	-13.912
Scale	0.330
stdev	0.280
Z_min/Location	-14.935/7.6°Lat 6.83333°Lon
Z_max/Location	-13.552/ 9.16667°Lat 6.43333°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

Bida Basin location map

Statistics - Thermal lithospheric thickness
Median	179.243
Mean	176.093
Scale	15.143
stdev	14.626
Z_min/Location	136.789/7.6°Lat 6.83333°Lon
Z_max/Location	196.000/ 10.0°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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Heatflow

Bida Basin location map

Statistics - Heatflow
Median	74.648
Mean	74.180
Scale	1.488
stdev	1.596
Z_min/Location	69.980/10.2333°Lat 4.56667°Lon
Z_max/Location	76.624/ 7.6°Lat 6.83333°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)

Bida Basin location map

Statistics - Topography (ETOPO2)
Median	152.000
Mean	171.833
Scale	71.165
stdev	72.514
Z_min/Location	53.000/9.06667°Lat 5.2°Lon
Z_max/Location	369.000/ 10.2333°Lat 5.33333°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

Bida Basin location map

Statistics - Base hard sediments
Median	-0.370
Mean	-0.416
Scale	0.266
stdev	0.326
Z_min/Location	-2.395/7.6°Lat 6.83333°Lon
Z_max/Location	0.176/ 10.2333°Lat 4.56667°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

Bida Basin location map

Statistics - Temperature at 50km depth
Median	589.420
Mean	597.316
Scale	36.191
stdev	35.490
Z_min/Location	549.272/9.93333°Lat 5.76667°Lon
Z_max/Location	696.564/ 7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Laske sediment thickness
Median	0.251
Mean	0.286
Scale	0.308
stdev	0.258
Z_min/Location	-0.081/8.6°Lat 5.0°Lon
Z_max/Location	1.098/ 7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Lithospheric temperature gradient
Median	5.773
Mean	5.788
Scale	0.406
stdev	0.368
Z_min/Location	5.205/10.0°Lat 5.0°Lon
Z_max/Location	6.970/ 7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Isostatic correction
Median	0.108
Mean	0.125
Scale	0.132
stdev	0.107
Z_min/Location	0.000/10.2667°Lat 4.6°Lon
Z_max/Location	0.464/7.6°Lat 6.83333°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)

Bida Basin location map

Statistics - TTS (sediment)
Median	0.248
Mean	0.291
Scale	0.117
stdev	0.247
Z_min/Location	-0.176/10.2333°Lat 4.56667°Lon
Z_max/Location	1.931/7.6°Lat 6.83333°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)

Bida Basin location map

Statistics - Beta (Sediment)
Median	1.033
Mean	1.040
Scale	0.016
stdev	0.037
Z_min/Location	0.978/10.2333°Lat 4.56667°Lon
Z_max/Location	1.328/7.6°Lat 6.83333°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.

Bida Basin location map

Statistics - Crustal vs lithosph. extn.
Median	0.037
Mean	0.031
Scale	0.085
stdev	0.075
Z_min/Location	-0.149/7.73333°Lat 6.96667°Lon
Z_max/Location	0.168/9.83333°Lat 5.9°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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Anomalous TTS

Bida Basin location map

Statistics - Anomalous TTS
Median	0.446
Mean	0.474
Scale	0.269
stdev	0.212
Z_min/Location	0.175/9.7°Lat 6.06667°Lon
Z_max/Location	1.406/7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Predicted elevation
Median	477.940
Mean	505.618
Scale	286.939
stdev	247.352
Z_min/Location	58.654/9.83333°Lat 5.9°Lon
Z_max/Location	1087.110/7.73333°Lat 6.96667°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)

Bida Basin location map

Statistics - Beta (Crust)
Median	0.989
Mean	0.979
Scale	0.035
stdev	0.036
Z_min/Location	0.902/10.0667°Lat 4.56667°Lon
Z_max/Location	1.072/7.6°Lat 6.83333°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)

Bida Basin location map

Statistics - TTS (crust)
Median	-0.089
Mean	-0.182
Scale	0.275
stdev	0.300
Z_min/Location	-0.846/10.0667°Lat 4.56667°Lon
Z_max/Location	0.525/7.6°Lat 6.83333°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

Bida Basin location map

Statistics - Differential Beta
Median	0.058
Mean	0.061
Scale	0.031
stdev	0.029
Z_min/Location	0.024/9.7°Lat 6.06667°Lon
Z_max/Location	0.256/7.6°Lat 6.83333°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