ICONS atlas: AFR - Ghadames Basin

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Overview

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

Basin name	Ghadames Basin
Region code	AFR
Basin ID	7240
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.

Ghadames Basin cross section

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Dynamic topography evolution for basin centroid

Ghadames 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

Ghadames Basin location map

Statistics - Mantle Lid thickness
Median	83.658
Mean	86.141
Scale	2.357
stdev	8.021
Z_min/Location	75.818/33.5°Lat 7.73333°Lon
Z_max/Location	127.417/ 27.3667°Lat 10.7°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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Depth of 550 deg isotherm

Ghadames Basin location map

Statistics - Depth of 550 deg isotherm
Median	-37.978
Mean	-38.340
Scale	0.227
stdev	1.348
Z_min/Location	-45.749/27.3667°Lat 10.7°Lon
Z_max/Location	-36.330/ 33.5°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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Mobil isopachs

Ghadames Basin location map

Statistics - Mobil isopachs
Median	3.048
Mean	2.933
Scale	1.536
stdev	1.184
Z_min/Location	0.558/28.6°Lat 14.2667°Lon
Z_max/Location	4.491/ 32.8°Lat 8.96667°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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Plain crustal thickness

Ghadames Basin location map

Statistics - Plain crustal thickness
Median	37.021
Mean	36.607
Scale	1.402
stdev	2.032
Z_min/Location	32.163/32.7667°Lat 9.6°Lon
Z_max/Location	39.688/ 29.5667°Lat 6.8°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

Ghadames Basin location map

Statistics - Base middle crust
Median	-27.358
Mean	-27.384
Scale	1.839
stdev	1.468
Z_min/Location	-30.371/33.1333°Lat 8.13333°Lon
Z_max/Location	-25.217/ 29.8333°Lat 14.5667°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

Ghadames Basin location map

Statistics - Base lower crust
Median	-38.696
Mean	-38.811
Scale	1.646
stdev	1.228
Z_min/Location	-40.939/29.7667°Lat 7.0°Lon
Z_max/Location	-35.999/ 33.5°Lat 10.1667°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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Total crustal thickness

Ghadames Basin location map

Statistics - Total crustal thickness
Median	39.153
Mean	39.267
Scale	1.657
stdev	1.266
Z_min/Location	36.169/33.5°Lat 10.1667°Lon
Z_max/Location	41.462/ 31.7°Lat 12.5667°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

Ghadames Basin location map

Statistics - Base upper crust
Median	-14.828
Mean	-14.954
Scale	1.448
stdev	1.143
Z_min/Location	-17.221/33.0667°Lat 8.16667°Lon
Z_max/Location	-13.131/ 27.3667°Lat 10.7667°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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Thermal lithospheric thickness

Ghadames Basin location map

Statistics - Thermal lithospheric thickness
Median	123.014
Mean	125.408
Scale	1.781
stdev	7.899
Z_min/Location	113.775/33.5°Lat 7.73333°Lon
Z_max/Location	166.518/ 27.3667°Lat 10.7°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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Heatflow

Ghadames Basin location map

Statistics - Heatflow
Median	74.523
Mean	74.367
Scale	7.774
stdev	6.486
Z_min/Location	61.446/30.1333°Lat 6.86667°Lon
Z_max/Location	86.783/ 29.9333°Lat 15.3°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)

Ghadames Basin location map

Statistics - Topography (ETOPO2)
Median	420.500
Mean	418.618
Scale	221.649
stdev	174.981
Z_min/Location	24.000/33.3667°Lat 8.3°Lon
Z_max/Location	1065.000/ 28.5°Lat 13.9667°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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Base hard sediments

Ghadames Basin location map

Statistics - Base hard sediments
Median	-1.793
Mean	-2.204
Scale	1.562
stdev	1.512
Z_min/Location	-5.221/32.8667°Lat 8.3°Lon
Z_max/Location	0.058/ 27.3667°Lat 10.7°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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Temperature at 50km depth

Ghadames Basin location map

Statistics - Temperature at 50km depth
Median	733.093
Mean	726.909
Scale	5.753
stdev	22.817
Z_min/Location	610.792/27.3667°Lat 10.7°Lon
Z_max/Location	770.506/ 33.5°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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Laske sediment thickness

Ghadames Basin location map

Statistics - Laske sediment thickness
Median	2.841
Mean	2.876
Scale	1.925
stdev	1.484
Z_min/Location	0.823/28.5°Lat 13.1667°Lon
Z_max/Location	5.921/ 31.2°Lat 7.86667°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

Ghadames Basin location map

Statistics - Lithospheric temperature gradient
Median	7.784
Mean	7.635
Scale	0.121
stdev	0.384
Z_min/Location	6.040/27.3667°Lat 10.7°Lon
Z_max/Location	8.299/ 33.3°Lat 7.46667°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

Ghadames Basin location map

Statistics - Isostatic correction
Median	1.150
Mean	1.140
Scale	0.717
stdev	0.550
Z_min/Location	0.350/28.5°Lat 13.1667°Lon
Z_max/Location	2.207/31.2°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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TTS (sediment)

Ghadames Basin location map

Statistics - TTS (sediment)
Median	0.598
Mean	1.064
Scale	0.776
stdev	1.101
Z_min/Location	-0.413/27.3667°Lat 10.7°Lon
Z_max/Location	3.542/33.0°Lat 8.26667°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)

Ghadames Basin location map

Statistics - Beta (Sediment)
Median	1.083
Mean	1.196
Scale	0.111
stdev	0.237
Z_min/Location	0.950/27.3667°Lat 10.7°Lon
Z_max/Location	1.828/33.0°Lat 8.26667°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.

Ghadames Basin location map

Statistics - Crustal vs lithosph. extn.
Median	0.001
Mean	0.028
Scale	0.050
stdev	0.065
Z_min/Location	-0.061/30.0°Lat 10.0°Lon
Z_max/Location	0.222/27.3667°Lat 10.7°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

Ghadames Basin location map

Statistics - Anomalous TTS
Median	0.798
Mean	1.008
Scale	0.747
stdev	0.754
Z_min/Location	-0.156/30.0333°Lat 14.4°Lon
Z_max/Location	2.646/33.0333°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

Ghadames Basin location map

Statistics - Predicted elevation
Median	1385.530
Mean	1359.460
Scale	109.999
stdev	153.112
Z_min/Location	662.482/27.3667°Lat 10.7°Lon
Z_max/Location	1533.530/31.6333°Lat 12.5333°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)

Ghadames Basin location map

Statistics - Beta (Crust)
Median	0.996
Mean	1.011
Scale	0.037
stdev	0.059
Z_min/Location	0.929/29.5667°Lat 6.8°Lon
Z_max/Location	1.146/32.7667°Lat 9.6°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)

Ghadames Basin location map

Statistics - TTS (crust)
Median	-0.031
Mean	0.057
Scale	0.297
stdev	0.431
Z_min/Location	-0.597/29.5667°Lat 6.8°Lon
Z_max/Location	0.999/32.7667°Lat 9.6°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

Ghadames Basin location map

Statistics - Differential Beta
Median	0.106
Mean	0.185
Scale	0.111
stdev	0.184
Z_min/Location	-0.019/30.0333°Lat 14.4°Lon
Z_max/Location	0.698/33.0333°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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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