ICONS atlas: SAM - San Julian Basin

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Overview

This page bundles the available data for the San Julian 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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San Julian Basin location map
Basin name San Julian Basin
Region code SAM
Basin ID 2300
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.

San Julian Basin cross section
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Dynamic topography evolution for basin centroid
San Julian 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
San Julian Basin location map
Statistics - Mantle Lid thickness
Median 79.915
Mean 79.933
Scale 0.327
stdev 0.256
Z_min/Location 79.532/-49.0333°Lat -64.8333°Lon
Z_max/Location 80.422/ -48.5°Lat -64.4333°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
San Julian Basin location map
Statistics - Depth of 550 deg isotherm
Median -34.949
Mean -34.957
Scale 0.061
stdev 0.047
Z_min/Location -35.041/-48.5°Lat -64.4333°Lon
Z_max/Location -34.882/ -49.0667°Lat -64.8°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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Mobil isopachs
San Julian Basin location map
Statistics - Mobil isopachs
Median 1.269
Mean 1.233
Scale 0.140
stdev 0.131
Z_min/Location 0.914/-48.5333°Lat -62.7°Lon
Z_max/Location 1.393/ -49.3667°Lat -61.7667°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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Plain crustal thickness
San Julian Basin location map
Statistics - Plain crustal thickness
Median 27.991
Mean 28.010
Scale 0.065
stdev 0.133
Z_min/Location 27.807/-48.3333°Lat -63.3333°Lon
Z_max/Location 28.543/ -48.9°Lat -64.8°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
San Julian Basin location map
Statistics - Base middle crust
Median -21.012
Mean -21.022
Scale 0.036
stdev 0.052
Z_min/Location -21.230/-48.5667°Lat -64.5667°Lon
Z_max/Location -20.956/ -49.2°Lat -63.4333°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
San Julian Basin location map
Statistics - Base lower crust
Median -28.980
Mean -29.010
Scale 0.080
stdev 0.130
Z_min/Location -29.548/-48.9°Lat -64.8°Lon
Z_max/Location -28.891/ -48.9333°Lat -63.3667°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
San Julian Basin location map
Statistics - Total crustal thickness
Median 28.832
Mean 28.872
Scale 0.072
stdev 0.141
Z_min/Location 28.752/-49.0°Lat -63.3333°Lon
Z_max/Location 29.448/ -48.9°Lat -64.8°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 upper crust
San Julian Basin location map
Statistics - Base upper crust
Median -10.991
Mean -10.999
Scale 0.038
stdev 0.037
Z_min/Location -11.103/-48.3333°Lat -63.2667°Lon
Z_max/Location -10.942/ -49.3°Lat -63.5333°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
San Julian Basin location map
Statistics - Thermal lithospheric thickness
Median 109.240
Mean 109.283
Scale 0.334
stdev 0.260
Z_min/Location 108.868/-49.0667°Lat -64.8°Lon
Z_max/Location 109.745/ -48.5°Lat -64.4333°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
San Julian Basin location map
Statistics - Heatflow
Median 82.066
Mean 82.098
Scale 0.281
stdev 0.338
Z_min/Location 81.339/-49.3333°Lat -61.6667°Lon
Z_max/Location 83.111/ -48.7°Lat -62.3°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)
San Julian Basin location map
Statistics - Topography (ETOPO2)
Median -142.000
Mean -139.724
Scale 19.274
stdev 23.453
Z_min/Location -173.000/-48.7°Lat -63.1°Lon
Z_max/Location -43.000/ -48.6°Lat -63.8333°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
San Julian Basin location map
Statistics - Base hard sediments
Median -0.994
Mean -1.000
Scale 0.039
stdev 0.037
Z_min/Location -1.103/-48.3333°Lat -63.2667°Lon
Z_max/Location -0.942/ -49.3°Lat -63.5333°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
San Julian Basin location map
Statistics - Temperature at 50km depth
Median 793.563
Mean 793.393
Scale 1.303
stdev 1.062
Z_min/Location 791.537/-48.5°Lat -64.4333°Lon
Z_max/Location 795.087/ -49.0667°Lat -64.8°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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Laske sediment thickness
San Julian Basin location map
Statistics - Laske sediment thickness
Median 0.888
Mean 0.887
Scale 0.160
stdev 0.162
Z_min/Location 0.514/-49.0667°Lat -64.8°Lon
Z_max/Location 1.261/ -48.3667°Lat -63.1667°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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Lithospheric temperature gradient
San Julian Basin location map
Statistics - Lithospheric temperature gradient
Median 8.680
Mean 8.677
Scale 0.023
stdev 0.018
Z_min/Location 8.645/-48.5°Lat -64.4333°Lon
Z_max/Location 8.706/ -49.0667°Lat -64.8°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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Computations

Isostatic correction
San Julian Basin location map
Statistics - Isostatic correction
Median 0.377
Mean 0.377
Scale 0.066
stdev 0.067
Z_min/Location 0.220/-49.0667°Lat -64.8°Lon
Z_max/Location 0.531/-48.3667°Lat -63.1667°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)
San Julian Basin location map
Statistics - TTS (sediment)
Median 0.614
Mean 0.623
Scale 0.045
stdev 0.049
Z_min/Location 0.560/-48.8°Lat -62.9°Lon
Z_max/Location 0.778/-49.0333°Lat -64.8333°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)
San Julian Basin location map
Statistics - Beta (Sediment)
Median 1.085
Mean 1.087
Scale 0.007
stdev 0.007
Z_min/Location 1.077/-48.8°Lat -62.9°Lon
Z_max/Location 1.111/-49.0333°Lat -64.8333°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.
San Julian Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.016
Mean -0.016
Scale 0.004
stdev 0.003
Z_min/Location -0.021/-48.9667°Lat -64.8333°Lon
Z_max/Location -0.009/-48.5°Lat -64.4333°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
San Julian Basin location map
Statistics - Anomalous TTS
Median 0.612
Mean 0.625
Scale 0.059
stdev 0.083
Z_min/Location 0.516/-48.3667°Lat -63.1667°Lon
Z_max/Location 0.920/-48.9667°Lat -64.8333°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
San Julian Basin location map
Statistics - Predicted elevation
Median 742.605
Mean 743.068
Scale 6.378
stdev 6.025
Z_min/Location 731.036/-48.5667°Lat -64.4333°Lon
Z_max/Location 757.028/-48.9°Lat -64.8°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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Beta (Crust)
San Julian Basin location map
Statistics - Beta (Crust)
Median 1.001
Mean 1.000
Scale 0.002
stdev 0.005
Z_min/Location 0.981/-48.9°Lat -64.8°Lon
Z_max/Location 1.007/-48.3333°Lat -63.3333°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)
San Julian Basin location map
Statistics - TTS (crust)
Median 0.004
Mean -0.001
Scale 0.018
stdev 0.037
Z_min/Location -0.150/-48.9°Lat -64.8°Lon
Z_max/Location 0.055/-48.3333°Lat -63.3333°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
San Julian Basin location map
Statistics - Differential Beta
Median 0.085
Mean 0.087
Scale 0.009
stdev 0.012
Z_min/Location 0.072/-48.3667°Lat -63.1667°Lon
Z_max/Location 0.128/-48.9667°Lat -64.8333°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