ICONS atlas: AFR - Mamfe Basin

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Overview

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

Basin name	Mamfe Basin
Region code	AFR
Basin ID	7590
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.

Mamfe Basin cross section

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Dynamic topography evolution for basin centroid

Mamfe 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

Mamfe Basin location map

Statistics - Mantle Lid thickness
Median	56.799
Mean	57.882
Scale	2.640
stdev	4.238
Z_min/Location	51.874/6.0°Lat 8.96667°Lon
Z_max/Location	84.648/ 4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Depth of 550 deg isotherm
Median	-31.902
Mean	-31.948
Scale	0.574
stdev	0.504
Z_min/Location	-33.764/4.53333°Lat 9.16667°Lon
Z_max/Location	-30.894/ 5.23333°Lat 8.13333°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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Mobil isopachs

Mamfe Basin location map

Statistics - Mobil isopachs
Median	1.687
Mean	1.474
Scale	0.623
stdev	0.756
Z_min/Location	-0.358/5.7°Lat 9.5°Lon
Z_max/Location	2.792/ 5.66667°Lat 7.73333°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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Plain crustal thickness

Mamfe Basin location map

Statistics - Plain crustal thickness
Median	34.532
Mean	33.495
Scale	2.615
stdev	3.130
Z_min/Location	24.487/4.53333°Lat 9.16667°Lon
Z_max/Location	37.884/ 6.96667°Lat 9.2°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 middle crust

Mamfe Basin location map

Statistics - Base middle crust
Median	-28.923
Mean	-28.512
Scale	1.088
stdev	1.567
Z_min/Location	-30.164/6.16667°Lat 8.2°Lon
Z_max/Location	-21.703/ 4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Base lower crust
Median	-40.091
Mean	-39.261
Scale	1.292
stdev	2.225
Z_min/Location	-41.162/6.43333°Lat 8.56667°Lon
Z_max/Location	-29.812/ 4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Total crustal thickness
Median	40.189
Mean	39.282
Scale	1.483
stdev	2.503
Z_min/Location	28.951/4.53333°Lat 9.16667°Lon
Z_max/Location	41.430/ 6.46667°Lat 8.6°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

Mamfe Basin location map

Statistics - Base upper crust
Median	-17.985
Mean	-17.752
Scale	1.776
stdev	1.522
Z_min/Location	-19.925/5.93333°Lat 8.0°Lon
Z_max/Location	-13.547/ 4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Thermal lithospheric thickness
Median	96.364
Mean	97.164
Scale	3.147
stdev	3.274
Z_min/Location	91.126/5.23333°Lat 8.13333°Lon
Z_max/Location	113.599/ 4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Heatflow
Median	79.487
Mean	79.974
Scale	1.673
stdev	1.792
Z_min/Location	77.243/7.16667°Lat 8.93333°Lon
Z_max/Location	84.257/ 4.53333°Lat 9.1°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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Topography (ETOPO2)

Mamfe Basin location map

Statistics - Topography (ETOPO2)
Median	133.000
Mean	167.302
Scale	28.169
stdev	125.516
Z_min/Location	1.000/4.66667°Lat 8.93333°Lon
Z_max/Location	793.000/ 5.66667°Lat 9.16667°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

Mamfe Basin location map

Statistics - Base hard sediments
Median	-5.764
Mean	-5.766
Scale	2.100
stdev	1.714
Z_min/Location	-8.668/5.63333°Lat 7.73333°Lon
Z_max/Location	-2.157/ 5.7°Lat 9.5°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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Temperature at 50km depth

Mamfe Basin location map

Statistics - Temperature at 50km depth
Median	880.361
Mean	876.916
Scale	16.201
stdev	16.295
Z_min/Location	834.088/4.53333°Lat 9.16667°Lon
Z_max/Location	913.534/ 5.23333°Lat 8.13333°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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Laske sediment thickness

Mamfe Basin location map

Statistics - Laske sediment thickness
Median	2.487
Mean	2.995
Scale	1.516
stdev	1.857
Z_min/Location	0.061/5.8°Lat 9.4°Lon
Z_max/Location	7.418/ 5.63333°Lat 7.73333°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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Lithospheric temperature gradient

Mamfe Basin location map

Statistics - Lithospheric temperature gradient
Median	8.283
Mean	8.275
Scale	0.254
stdev	0.312
Z_min/Location	7.134/4.53333°Lat 9.16667°Lon
Z_max/Location	8.947/ 5.23333°Lat 8.13333°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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Computations

Isostatic correction

Mamfe Basin location map

Statistics - Isostatic correction
Median	1.015
Mean	1.172
Scale	0.586
stdev	0.672
Z_min/Location	0.026/5.8°Lat 9.4°Lon
Z_max/Location	2.649/5.63333°Lat 7.73333°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)

Mamfe Basin location map

Statistics - TTS (sediment)
Median	4.805
Mean	4.595
Scale	1.229
stdev	1.155
Z_min/Location	1.782/7.0°Lat 9.2°Lon
Z_max/Location	6.072/5.8°Lat 7.86667°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)

Mamfe Basin location map

Statistics - Beta (Sediment)
Median	2.593
Mean	2.737
Scale	1.091
stdev	0.925
Z_min/Location	1.295/7.0°Lat 9.2°Lon
Z_max/Location	4.474/5.8°Lat 7.86667°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.

Mamfe Basin location map

Statistics - Crustal vs lithosph. extn.
Median	-0.312
Mean	-0.287
Scale	0.048
stdev	0.083
Z_min/Location	-0.406/6.0°Lat 8.96667°Lon
Z_max/Location	0.154/4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Anomalous TTS
Median	6.887
Mean	6.676
Scale	0.866
stdev	0.855
Z_min/Location	3.854/4.53333°Lat 9.16667°Lon
Z_max/Location	7.707/6.03333°Lat 8.23333°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

Mamfe Basin location map

Statistics - Predicted elevation
Median	1891.070
Mean	1820.280
Scale	55.748
stdev	186.667
Z_min/Location	754.512/4.53333°Lat 9.16667°Lon
Z_max/Location	1962.850/6.0°Lat 8.96667°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)

Mamfe Basin location map

Statistics - Beta (Crust)
Median	0.766
Mean	0.797
Scale	0.057
stdev	0.081
Z_min/Location	0.698/6.96667°Lat 9.2°Lon
Z_max/Location	1.080/4.53333°Lat 9.16667°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)

Mamfe Basin location map

Statistics - TTS (crust)
Median	-2.387
Mean	-2.081
Scale	0.773
stdev	0.925
Z_min/Location	-3.378/6.96667°Lat 9.2°Lon
Z_max/Location	0.582/4.53333°Lat 9.16667°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

Mamfe Basin location map

Statistics - Differential Beta
Median	1.789
Mean	1.940
Scale	1.021
stdev	0.878
Z_min/Location	0.596/7.0°Lat 9.2°Lon
Z_max/Location	3.605/5.8°Lat 7.86667°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