ICONS atlas: AFR - Iullemmeden Basin

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Overview

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

Basin name	Iullemmeden Basin
Region code	AFR
Basin ID	7720
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.

Iullemmeden Basin cross section

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Dynamic topography evolution for basin centroid

Iullemmeden 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

Iullemmeden Basin location map

Statistics - Mantle Lid thickness
Median	103.559
Mean	111.035
Scale	19.399
stdev	22.096
Z_min/Location	85.750/18.0°Lat 5.0°Lon
Z_max/Location	177.104/ 15.2°Lat 1.43333°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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Depth of 550 deg isotherm

Iullemmeden Basin location map

Statistics - Depth of 550 deg isotherm
Median	-41.509
Mean	-42.948
Scale	3.387
stdev	4.023
Z_min/Location	-56.084/15.3333°Lat 1.43333°Lon
Z_max/Location	-39.000/ 18.0°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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Mobil isopachs

Iullemmeden Basin location map

Statistics - Mobil isopachs
Median	1.414
Mean	1.250
Scale	0.877
stdev	0.753
Z_min/Location	-0.521/19.3667°Lat 7.73333°Lon
Z_max/Location	2.296/ 16.4333°Lat 3.33333°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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Plain crustal thickness

Iullemmeden Basin location map

Statistics - Plain crustal thickness
Median	40.728
Mean	40.875
Scale	2.832
stdev	2.274
Z_min/Location	36.950/16.0667°Lat 5.86667°Lon
Z_max/Location	46.555/ 18.9333°Lat 2.83333°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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Base middle crust

Iullemmeden Basin location map

Statistics - Base middle crust
Median	-27.482
Mean	-27.882
Scale	1.838
stdev	1.726
Z_min/Location	-32.167/18.9°Lat 2.8°Lon
Z_max/Location	-25.049/ 12.8°Lat 3.43333°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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Base lower crust

Iullemmeden Basin location map

Statistics - Base lower crust
Median	-41.222
Mean	-41.331
Scale	2.241
stdev	2.320
Z_min/Location	-47.467/18.7333°Lat 2.9°Lon
Z_max/Location	-37.691/ 16.0333°Lat 5.96667°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

Iullemmeden Basin location map

Statistics - Total crustal thickness
Median	41.597
Mean	41.692
Scale	2.306
stdev	2.377
Z_min/Location	37.990/16.0333°Lat 5.96667°Lon
Z_max/Location	47.935/ 18.7667°Lat 2.93333°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

Iullemmeden Basin location map

Statistics - Base upper crust
Median	-13.832
Mean	-14.013
Scale	0.836
stdev	0.990
Z_min/Location	-16.488/18.4667°Lat 3.03333°Lon
Z_max/Location	-12.359/ 12.9°Lat 3.5°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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Thermal lithospheric thickness

Iullemmeden Basin location map

Statistics - Thermal lithospheric thickness
Median	145.301
Mean	152.727
Scale	20.855
stdev	22.051
Z_min/Location	129.478/14.8333°Lat 9.6°Lon
Z_max/Location	215.569/ 15.2°Lat 1.43333°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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Heatflow

Iullemmeden Basin location map

Statistics - Heatflow
Median	63.923
Mean	63.962
Scale	8.010
stdev	6.479
Z_min/Location	49.590/17.9°Lat 2.46667°Lon
Z_max/Location	75.807/ 13.5°Lat 8.56667°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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Topography (ETOPO2)

Iullemmeden Basin location map

Statistics - Topography (ETOPO2)
Median	418.000
Mean	392.046
Scale	77.095
stdev	106.348
Z_min/Location	78.000/10.4667°Lat 4.43333°Lon
Z_max/Location	1023.000/ 21.4333°Lat 6.93333°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

Iullemmeden Basin location map

Statistics - Base hard sediments
Median	-0.535
Mean	-0.455
Scale	0.571
stdev	0.539
Z_min/Location	-1.731/16.1667°Lat 4.1°Lon
Z_max/Location	0.715/ 22.3333°Lat 7.03333°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

Iullemmeden Basin location map

Statistics - Temperature at 50km depth
Median	670.137
Mean	653.778
Scale	52.416
stdev	52.285
Z_min/Location	530.164/15.2°Lat 1.43333°Lon
Z_max/Location	712.258/ 14.9°Lat 9.63333°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

Iullemmeden Basin location map

Statistics - Laske sediment thickness
Median	1.223
Mean	1.147
Scale	0.704
stdev	0.584
Z_min/Location	-0.080/13.8333°Lat 1.76667°Lon
Z_max/Location	2.299/ 15.2°Lat 3.13333°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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Lithospheric temperature gradient

Iullemmeden Basin location map

Statistics - Lithospheric temperature gradient
Median	6.504
Mean	6.427
Scale	1.006
stdev	0.743
Z_min/Location	4.848/15.3333°Lat 1.43333°Lon
Z_max/Location	7.436/ 14.8333°Lat 9.6°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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Computations

Isostatic correction

Iullemmeden Basin location map

Statistics - Isostatic correction
Median	0.515
Mean	0.481
Scale	0.287
stdev	0.240
Z_min/Location	0.000/14.4333°Lat 1.56667°Lon
Z_max/Location	0.943/15.2°Lat 3.13333°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)

Iullemmeden Basin location map

Statistics - TTS (sediment)
Median	-0.055
Mean	-0.026
Scale	0.356
stdev	0.411
Z_min/Location	-0.823/22.3333°Lat 7.03333°Lon
Z_max/Location	1.103/16.0667°Lat 4.13333°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)

Iullemmeden Basin location map

Statistics - Beta (Sediment)
Median	0.993
Mean	1.000
Scale	0.045
stdev	0.054
Z_min/Location	0.905/22.3333°Lat 7.03333°Lon
Z_max/Location	1.164/16.0667°Lat 4.13333°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.

Iullemmeden Basin location map

Statistics - Crustal vs lithosph. extn.
Median	-0.288
Mean	-0.246
Scale	0.182
stdev	0.171
Z_min/Location	-0.499/14.8333°Lat 9.6°Lon
Z_max/Location	0.206/15.2°Lat 1.43333°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

Iullemmeden Basin location map

Statistics - Anomalous TTS
Median	-0.207
Mean	-0.058
Scale	0.419
stdev	0.621
Z_min/Location	-1.070/13.8333°Lat 3.96667°Lon
Z_max/Location	1.858/18.3667°Lat 2.56667°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

Iullemmeden Basin location map

Statistics - Predicted elevation
Median	1202.470
Mean	1055.830
Scale	328.116
stdev	394.977
Z_min/Location	-242.405/15.2°Lat 1.43333°Lon
Z_max/Location	1565.050/18.0°Lat 5.0°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)

Iullemmeden Basin location map

Statistics - Beta (Crust)
Median	1.008
Mean	1.007
Scale	0.070
stdev	0.055
Z_min/Location	0.882/18.9333°Lat 2.83333°Lon
Z_max/Location	1.111/16.0667°Lat 5.86667°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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TTS (crust)

Iullemmeden Basin location map

Statistics - TTS (crust)
Median	0.060
Mean	0.032
Scale	0.540
stdev	0.433
Z_min/Location	-1.050/18.9333°Lat 2.83333°Lon
Z_max/Location	0.780/16.0667°Lat 5.86667°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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Differential Beta

Iullemmeden Basin location map

Statistics - Differential Beta
Median	-0.025
Mean	-0.008
Scale	0.056
stdev	0.080
Z_min/Location	-0.136/13.8333°Lat 3.93333°Lon
Z_max/Location	0.239/18.3°Lat 2.53333°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