ICONS atlas: AFR - Sirte Basin

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Overview

This page bundles the available data for the Sirte 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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Sirte Basin location map
Basin name Sirte Basin
Region code AFR
Basin ID 7260
Plate location/code pasv divrg cont marg/PDC
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.

Sirte Basin cross section
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Dynamic topography evolution for basin centroid
Sirte 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
Sirte Basin location map
Statistics - Mantle Lid thickness
Median 85.403
Mean 91.874
Scale 2.935
stdev 16.596
Z_min/Location 77.792/33.3333°Lat 15.7333°Lon
Z_max/Location 156.003/ 23.0667°Lat 16.9667°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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Depth of 550 deg isotherm
Sirte Basin location map
Statistics - Depth of 550 deg isotherm
Median -38.001
Mean -39.360
Scale 0.072
stdev 3.244
Z_min/Location -52.714/23.0667°Lat 16.9667°Lon
Z_max/Location -35.584/ 33.4°Lat 15.7667°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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Mobil isopachs
Sirte Basin location map
Statistics - Mobil isopachs
Median 2.776
Mean 2.819
Scale 1.412
stdev 1.496
Z_min/Location 0.002/23.1333°Lat 16.7333°Lon
Z_max/Location 8.233/ 32.4°Lat 19.0°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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Plain crustal thickness
Sirte Basin location map
Statistics - Plain crustal thickness
Median 37.629
Mean 37.412
Scale 1.537
stdev 3.528
Z_min/Location 22.240/32.3667°Lat 19.1333°Lon
Z_max/Location 43.498/ 23.1°Lat 17.0333°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
Sirte Basin location map
Statistics - Base middle crust
Median -26.919
Mean -27.382
Scale 1.340
stdev 2.069
Z_min/Location -33.017/28.7333°Lat 23.1°Lon
Z_max/Location -21.586/ 32.2333°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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Base lower crust
Sirte Basin location map
Statistics - Base lower crust
Median -39.276
Mean -39.158
Scale 1.903
stdev 2.406
Z_min/Location -42.473/23.8667°Lat 17.2667°Lon
Z_max/Location -29.238/ 32.3667°Lat 19.1333°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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Total crustal thickness
Sirte Basin location map
Statistics - Total crustal thickness
Median 39.585
Mean 39.484
Scale 1.849
stdev 2.537
Z_min/Location 28.688/32.3667°Lat 19.1333°Lon
Z_max/Location 43.238/ 23.1°Lat 17.0333°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
Sirte Basin location map
Statistics - Base upper crust
Median -14.480
Mean -14.813
Scale 0.719
stdev 1.023
Z_min/Location -17.755/29.4333°Lat 22.2°Lon
Z_max/Location -13.325/ 29.9°Lat 15.3333°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
Sirte Basin location map
Statistics - Thermal lithospheric thickness
Median 124.003
Mean 131.359
Scale 0.444
stdev 17.785
Z_min/Location 113.105/33.4°Lat 15.7667°Lon
Z_max/Location 199.240/ 23.0667°Lat 16.9667°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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Heatflow
Sirte Basin location map
Statistics - Heatflow
Median 75.991
Mean 73.938
Scale 8.566
stdev 8.240
Z_min/Location 51.941/32.3333°Lat 18.3°Lon
Z_max/Location 88.653/ 29.7667°Lat 17.7°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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Topography (ETOPO2)
Sirte Basin location map
Statistics - Topography (ETOPO2)
Median 166.000
Mean 131.229
Scale 189.773
stdev 378.128
Z_min/Location -1949.000/32.5667°Lat 18.1667°Lon
Z_max/Location 1001.000/ 27.3333°Lat 17.2°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
Sirte Basin location map
Statistics - Base hard sediments
Median -1.558
Mean -1.746
Scale 0.815
stdev 1.361
Z_min/Location -6.998/32.3667°Lat 19.1333°Lon
Z_max/Location 1.117/ 23.1°Lat 17.0333°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
Sirte Basin location map
Statistics - Temperature at 50km depth
Median 729.994
Mean 711.340
Scale 2.088
stdev 48.596
Z_min/Location 540.473/23.0667°Lat 16.9667°Lon
Z_max/Location 807.198/ 33.4°Lat 15.7667°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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Laske sediment thickness
Sirte Basin location map
Statistics - Laske sediment thickness
Median 2.158
Mean 2.383
Scale 1.353
stdev 1.532
Z_min/Location 0.027/23.0667°Lat 16.9667°Lon
Z_max/Location 9.310/ 32.4333°Lat 18.8°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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Lithospheric temperature gradient
Sirte Basin location map
Statistics - Lithospheric temperature gradient
Median 7.705
Mean 7.409
Scale 0.046
stdev 0.678
Z_min/Location 5.100/23.0667°Lat 16.9667°Lon
Z_max/Location 8.446/ 33.4°Lat 15.7667°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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Computations

Isostatic correction
Sirte Basin location map
Statistics - Isostatic correction
Median 0.889
Mean 0.951
Scale 0.531
stdev 0.553
Z_min/Location 0.012/23.0667°Lat 16.9667°Lon
Z_max/Location 3.142/32.4333°Lat 18.8°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)
Sirte Basin location map
Statistics - TTS (sediment)
Median 0.701
Mean 0.794
Scale 0.592
stdev 0.902
Z_min/Location -1.142/23.3667°Lat 17.3°Lon
Z_max/Location 4.012/32.1°Lat 19.9667°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)
Sirte Basin location map
Statistics - Beta (Sediment)
Median 1.098
Mean 1.135
Scale 0.090
stdev 0.172
Z_min/Location 0.873/23.3667°Lat 17.3°Lon
Z_max/Location 2.054/32.1°Lat 19.9667°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.
Sirte Basin location map
Statistics - Crustal vs lithosph. extn.
Median 0.060
Mean 0.099
Scale 0.050
stdev 0.117
Z_min/Location -0.013/28.8667°Lat 23.2333°Lon
Z_max/Location 0.757/32.3667°Lat 19.1333°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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Anomalous TTS
Sirte Basin location map
Statistics - Anomalous TTS
Median 0.386
Mean 0.451
Scale 0.440
stdev 0.490
Z_min/Location -0.500/30.0333°Lat 15.2667°Lon
Z_max/Location 2.423/32.5333°Lat 14.6667°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
Sirte Basin location map
Statistics - Predicted elevation
Median 1354.980
Mean 1265.090
Scale 123.395
stdev 275.971
Z_min/Location 323.910/23.0667°Lat 16.9667°Lon
Z_max/Location 1581.670/31.9667°Lat 15.5667°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)
Sirte Basin location map
Statistics - Beta (Crust)
Median 1.040
Mean 1.057
Scale 0.042
stdev 0.124
Z_min/Location 0.900/23.1°Lat 17.0333°Lon
Z_max/Location 1.759/32.3667°Lat 19.1333°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)
Sirte Basin location map
Statistics - TTS (crust)
Median 0.300
Mean 0.343
Scale 0.307
stdev 0.705
Z_min/Location -0.873/23.1°Lat 17.0333°Lon
Z_max/Location 3.375/32.3667°Lat 19.1333°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
Sirte Basin location map
Statistics - Differential Beta
Median 0.057
Mean 0.077
Scale 0.072
stdev 0.092
Z_min/Location -0.067/30.0333°Lat 15.2667°Lon
Z_max/Location 0.646/33.4°Lat 15.7667°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