ICONS atlas: SAM - Sao Francisco Basin

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Overview

This page bundles the available data for the Sao Francisco Basin in the South America. 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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Sao Francisco Basin location map
Basin name Sao Francisco Basin
Region code SAM
Basin ID 2190
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.

Sao Francisco Basin cross section
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Dynamic topography evolution for basin centroid
Sao Francisco 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
Sao Francisco Basin location map
Statistics - Mantle Lid thickness
Median 119.099
Mean 117.305
Scale 8.469
stdev 10.298
Z_min/Location 91.706/-18.0°Lat -46.9667°Lon
Z_max/Location 147.013/ -19.2°Lat -43.6333°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
Sao Francisco Basin location map
Statistics - Depth of 550 deg isotherm
Median -44.316
Mean -43.893
Scale 1.442
stdev 1.866
Z_min/Location -48.893/-19.4°Lat -43.6333°Lon
Z_max/Location -39.143/ -18.0°Lat -46.9667°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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Mobil isopachs
Sao Francisco Basin location map
Statistics - Mobil isopachs
Median 0.338
Mean 0.345
Scale 0.218
stdev 0.175
Z_min/Location 0.007/-18.4667°Lat -44.5667°Lon
Z_max/Location 0.797/ -9.76667°Lat -46.3333°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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Plain crustal thickness
Sao Francisco Basin location map
Statistics - Plain crustal thickness
Median 37.650
Mean 37.706
Scale 1.038
stdev 0.690
Z_min/Location 36.578/-11.1°Lat -47.0667°Lon
Z_max/Location 38.816/ -19.6°Lat -43.7333°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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Base middle crust
Sao Francisco Basin location map
Statistics - Base middle crust
Median -24.714
Mean -24.704
Scale 0.524
stdev 0.364
Z_min/Location -25.463/-20.1333°Lat -46.4°Lon
Z_max/Location -23.893/ -11.1°Lat -47.0667°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
Sao Francisco Basin location map
Statistics - Base lower crust
Median -37.152
Mean -37.213
Scale 1.256
stdev 0.835
Z_min/Location -38.542/-18.6°Lat -47.0333°Lon
Z_max/Location -35.967/ -11.1°Lat -47.0667°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
Sao Francisco Basin location map
Statistics - Total crustal thickness
Median 37.858
Mean 37.928
Scale 1.368
stdev 0.912
Z_min/Location 36.446/-10.9°Lat -47.0667°Lon
Z_max/Location 39.328/ -20.1333°Lat -46.4°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
Sao Francisco Basin location map
Statistics - Base upper crust
Median -12.294
Mean -12.249
Scale 0.084
stdev 0.121
Z_min/Location -12.551/-9.66667°Lat -46.6°Lon
Z_max/Location -11.881/ -20.8°Lat -45.5°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
Sao Francisco Basin location map
Statistics - Thermal lithospheric thickness
Median 157.170
Mean 155.233
Scale 7.996
stdev 9.956
Z_min/Location 130.715/-18.0°Lat -46.9667°Lon
Z_max/Location 185.902/ -19.4°Lat -43.6333°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
Sao Francisco Basin location map
Statistics - Heatflow
Median 51.755
Mean 52.001
Scale 3.435
stdev 2.509
Z_min/Location 47.594/-16.1°Lat -47.2667°Lon
Z_max/Location 56.529/ -12.2°Lat -45.9°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)
Sao Francisco Basin location map
Statistics - Topography (ETOPO2)
Median 649.000
Mean 676.131
Scale 154.190
stdev 139.855
Z_min/Location 279.000/-10.2°Lat -46.9333°Lon
Z_max/Location 1341.000/ -17.8333°Lat -44.3333°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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Base hard sediments
Sao Francisco Basin location map
Statistics - Base hard sediments
Median 0.530
Mean 0.492
Scale 0.198
stdev 0.163
Z_min/Location 0.078/-20.0667°Lat -46.4°Lon
Z_max/Location 0.726/ -10.9°Lat -45.3333°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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Temperature at 50km depth
Sao Francisco Basin location map
Statistics - Temperature at 50km depth
Median 630.043
Mean 637.089
Scale 21.830
stdev 27.357
Z_min/Location 567.167/-19.4°Lat -43.6333°Lon
Z_max/Location 712.662/ -18.0°Lat -46.9667°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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Laske sediment thickness
Sao Francisco Basin location map
Statistics - Laske sediment thickness
Median 0.190
Mean 0.220
Scale 0.143
stdev 0.158
Z_min/Location -0.073/-20.4°Lat -45.6667°Lon
Z_max/Location 0.748/ -10.0333°Lat -45.4°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
Sao Francisco Basin location map
Statistics - Lithospheric temperature gradient
Median 6.330
Mean 6.355
Scale 0.336
stdev 0.313
Z_min/Location 5.499/-19.4°Lat -43.6333°Lon
Z_max/Location 7.152/ -10.0°Lat -46.9°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
Sao Francisco Basin location map
Statistics - Isostatic correction
Median 0.082
Mean 0.095
Scale 0.062
stdev 0.067
Z_min/Location 0.000/-11.0°Lat -47.0333°Lon
Z_max/Location 0.319/-10.0333°Lat -45.4°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)
Sao Francisco Basin location map
Statistics - TTS (sediment)
Median -0.617
Mean -0.587
Scale 0.251
stdev 0.205
Z_min/Location -1.008/-10.7°Lat -45.3°Lon
Z_max/Location -0.201/-18.9333°Lat -46.6667°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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Beta (Sediment)
Sao Francisco Basin location map
Statistics - Beta (Sediment)
Median 0.927
Mean 0.931
Scale 0.027
stdev 0.023
Z_min/Location 0.886/-10.7°Lat -45.3°Lon
Z_max/Location 0.975/-18.9333°Lat -46.6667°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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Crustal vs lithosph. extn.
Sao Francisco Basin location map
Statistics - Crustal vs lithosph. extn.
Median 0.037
Mean 0.023
Scale 0.061
stdev 0.071
Z_min/Location -0.177/-18.0°Lat -46.9667°Lon
Z_max/Location 0.166/-18.9°Lat -43.8°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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Anomalous TTS
Sao Francisco Basin location map
Statistics - Anomalous TTS
Median -0.558
Mean -0.526
Scale 0.456
stdev 0.339
Z_min/Location -1.118/-10.7333°Lat -45.3°Lon
Z_max/Location 0.053/-18.9333°Lat -46.6667°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
Sao Francisco Basin location map
Statistics - Predicted elevation
Median 735.933
Mean 766.253
Scale 197.785
stdev 209.585
Z_min/Location 286.935/-18.9667°Lat -43.7667°Lon
Z_max/Location 1278.620/-18.0°Lat -46.9667°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 (Crust)
Sao Francisco Basin location map
Statistics - Beta (Crust)
Median 0.994
Mean 0.992
Scale 0.028
stdev 0.018
Z_min/Location 0.964/-19.6°Lat -43.7333°Lon
Z_max/Location 1.023/-11.1°Lat -47.0667°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)
Sao Francisco Basin location map
Statistics - TTS (crust)
Median -0.050
Mean -0.062
Scale 0.217
stdev 0.144
Z_min/Location -0.294/-19.6°Lat -43.7333°Lon
Z_max/Location 0.174/-11.1°Lat -47.0667°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
Sao Francisco Basin location map
Statistics - Differential Beta
Median -0.066
Mean -0.062
Scale 0.054
stdev 0.040
Z_min/Location -0.128/-10.7333°Lat -45.3333°Lon
Z_max/Location 0.006/-18.9333°Lat -46.6667°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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This basin data is based on interpolated global grids and might contain gridding errors or wrongly interpolated data values.

Page generated 2008-08-03 02:36:53 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia