ICONS atlas: AFR - Zaire Basin

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Overview

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

Basin name	Zaire Basin
Region code	AFR
Basin ID	7330
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.

Zaire Basin cross section

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Dynamic topography evolution for basin centroid

Zaire 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

Zaire Basin location map

Statistics - Mantle Lid thickness
Median	100.658
Mean	110.201
Scale	3.342
stdev	20.047
Z_min/Location	93.889/5.9°Lat 16.2333°Lon
Z_max/Location	204.331/ 0.7°Lat 14.8667°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

Zaire Basin location map

Statistics - Depth of 550 deg isotherm
Median	-41.061
Mean	-42.729
Scale	0.091
stdev	3.565
Z_min/Location	-64.747/0.7°Lat 14.8667°Lon
Z_max/Location	-38.983/ 5.9°Lat 16.2333°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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Mobil isopachs

Zaire Basin location map

Statistics - Mobil isopachs
Median	1.998
Mean	2.246
Scale	2.134
stdev	1.684
Z_min/Location	-0.590/3.5°Lat 20.9667°Lon
Z_max/Location	5.309/ -2.26667°Lat 19.2333°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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Plain crustal thickness

Zaire Basin location map

Statistics - Plain crustal thickness
Median	37.278
Mean	37.523
Scale	0.580
stdev	1.056
Z_min/Location	34.285/-6.4°Lat 15.1333°Lon
Z_max/Location	43.080/ -5.46667°Lat 26.3667°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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Base middle crust

Zaire Basin location map

Statistics - Base middle crust
Median	-27.298
Mean	-27.149
Scale	2.189
stdev	1.780
Z_min/Location	-31.644/1.93333°Lat 20.0°Lon
Z_max/Location	-23.667/ -6.4°Lat 15.1333°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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Base lower crust

Zaire Basin location map

Statistics - Base lower crust
Median	-39.950
Mean	-39.422
Scale	1.976
stdev	1.906
Z_min/Location	-42.669/1.83333°Lat 20.0°Lon
Z_max/Location	-34.571/ 5.5°Lat 16.7667°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

Zaire Basin location map

Statistics - Total crustal thickness
Median	40.409
Mean	39.981
Scale	1.915
stdev	1.765
Z_min/Location	35.212/5.5°Lat 16.7667°Lon
Z_max/Location	43.128/ -5.46667°Lat 26.3667°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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Base upper crust

Zaire Basin location map

Statistics - Base upper crust
Median	-14.793
Mean	-14.792
Scale	2.285
stdev	2.053
Z_min/Location	-19.644/1.93333°Lat 20.0°Lon
Z_max/Location	-10.885/ -8.23333°Lat 17.1°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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Thermal lithospheric thickness

Zaire Basin location map

Statistics - Thermal lithospheric thickness
Median	140.493
Mean	150.182
Scale	0.734
stdev	19.269
Z_min/Location	129.641/5.9°Lat 16.2333°Lon
Z_max/Location	243.635/ 0.7°Lat 14.8667°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

Zaire Basin location map

Statistics - Heatflow
Median	46.656
Mean	48.221
Scale	2.381
stdev	4.097
Z_min/Location	43.787/-2.16667°Lat 19.9°Lon
Z_max/Location	61.807/ -10.0667°Lat 17.4333°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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Topography (ETOPO2)

Zaire Basin location map

Statistics - Topography (ETOPO2)
Median	452.000
Mean	525.117
Scale	123.056
stdev	200.207
Z_min/Location	108.000/-4.13333°Lat 15.3333°Lon
Z_max/Location	1414.000/ -10.8667°Lat 18.2°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 hard sediments

Zaire Basin location map

Statistics - Base hard sediments
Median	-1.785
Mean	-1.899
Scale	2.316
stdev	1.905
Z_min/Location	-6.644/1.93333°Lat 20.0°Lon
Z_max/Location	1.299/ -8.6°Lat 16.7333°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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Temperature at 50km depth

Zaire Basin location map

Statistics - Temperature at 50km depth
Median	674.257
Mean	654.852
Scale	1.147
stdev	39.409
Z_min/Location	493.125/0.7°Lat 14.8667°Lon
Z_max/Location	710.043/ 5.9°Lat 16.2333°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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Laske sediment thickness

Zaire Basin location map

Statistics - Laske sediment thickness
Median	2.458
Mean	2.710
Scale	2.408
stdev	1.998
Z_min/Location	-0.016/4.2°Lat 15.8°Lon
Z_max/Location	9.134/ 1.06667°Lat 19.1°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

Zaire Basin location map

Statistics - Lithospheric temperature gradient
Median	6.902
Mean	6.557
Scale	0.057
stdev	0.629
Z_min/Location	4.389/-1.03333°Lat 14.2°Lon
Z_max/Location	7.427/ 5.9°Lat 16.2333°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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Computations

Isostatic correction

Zaire Basin location map

Statistics - Isostatic correction
Median	1.004
Mean	1.059
Scale	0.931
stdev	0.735
Z_min/Location	0.000/4.36667°Lat 15.5667°Lon
Z_max/Location	3.099/1.06667°Lat 19.1°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)

Zaire Basin location map

Statistics - TTS (sediment)
Median	0.637
Mean	0.840
Scale	1.452
stdev	1.278
Z_min/Location	-1.349/-8.5°Lat 16.8°Lon
Z_max/Location	4.482/2.03333°Lat 20.3333°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)

Zaire Basin location map

Statistics - Beta (Sediment)
Median	1.089
Mean	1.164
Scale	0.209
stdev	0.248
Z_min/Location	0.853/-8.5°Lat 16.8°Lon
Z_max/Location	2.342/2.03333°Lat 20.3333°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.

Zaire Basin location map

Statistics - Crustal vs lithosph. extn.
Median	-0.025
Mean	0.017
Scale	0.033
stdev	0.101
Z_min/Location	-0.138/-5.6°Lat 26.2333°Lon
Z_max/Location	0.399/-2.0°Lat 14.0333°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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Anomalous TTS

Zaire Basin location map

Statistics - Anomalous TTS
Median	0.818
Mean	0.937
Scale	1.439
stdev	1.227
Z_min/Location	-1.426/-8.1°Lat 16.9667°Lon
Z_max/Location	4.284/2.0°Lat 20.4333°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

Zaire Basin location map

Statistics - Predicted elevation
Median	1156.760
Mean	993.355
Scale	160.112
stdev	390.097
Z_min/Location	-708.076/-2.0°Lat 14.0333°Lon
Z_max/Location	1343.770/1.83333°Lat 20.0°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)

Zaire Basin location map

Statistics - Beta (Crust)
Median	0.994
Mean	0.988
Scale	0.016
stdev	0.027
Z_min/Location	0.860/-5.46667°Lat 26.3667°Lon
Z_max/Location	1.081/-6.4°Lat 15.1333°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)

Zaire Basin location map

Statistics - TTS (crust)
Median	-0.045
Mean	-0.097
Scale	0.122
stdev	0.223
Z_min/Location	-1.270/-5.46667°Lat 26.3667°Lon
Z_max/Location	0.586/-6.4°Lat 15.1333°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

Zaire Basin location map

Statistics - Differential Beta
Median	0.109
Mean	0.176
Scale	0.207
stdev	0.240
Z_min/Location	-0.159/-8.06667°Lat 17.0667°Lon
Z_max/Location	1.316/2.0°Lat 20.3667°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