ICONS atlas: SAM - Valdes Basin

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Overview

This page bundles the available data for the Valdes 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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Valdes Basin location map
Basin name Valdes Basin
Region code SAM
Basin ID 2040
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.

Valdes Basin cross section
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Dynamic topography evolution for basin centroid
Valdes 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
Valdes Basin location map
Statistics - Mantle Lid thickness
Median 80.587
Mean 80.815
Scale 3.645
stdev 3.434
Z_min/Location 74.019/-41.1°Lat -65.2333°Lon
Z_max/Location 91.538/ -42.1°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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Depth of 550 deg isotherm
Valdes Basin location map
Statistics - Depth of 550 deg isotherm
Median -35.469
Mean -35.554
Scale 0.456
stdev 0.447
Z_min/Location -37.229/-42.1°Lat -61.7667°Lon
Z_max/Location -35.000/ -41.0°Lat -65.0°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
Valdes Basin location map
Statistics - Mobil isopachs
Median 0.758
Mean 0.905
Scale 1.211
stdev 0.927
Z_min/Location -0.826/-42.9333°Lat -65.3333°Lon
Z_max/Location 2.679/ -43.1333°Lat -61.8333°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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Plain crustal thickness
Valdes Basin location map
Statistics - Plain crustal thickness
Median 29.602
Mean 29.892
Scale 2.081
stdev 1.803
Z_min/Location 27.679/-42.4333°Lat -61.7°Lon
Z_max/Location 35.360/ -41.1°Lat -65.2333°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 middle crust
Valdes Basin location map
Statistics - Base middle crust
Median -21.379
Mean -21.655
Scale 0.459
stdev 0.692
Z_min/Location -24.118/-41.1°Lat -65.2333°Lon
Z_max/Location -20.958/ -42.3667°Lat -61.6667°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
Valdes Basin location map
Statistics - Base lower crust
Median -30.641
Mean -30.865
Scale 1.971
stdev 1.658
Z_min/Location -35.732/-41.1°Lat -65.2333°Lon
Z_max/Location -28.743/ -42.4333°Lat -61.7°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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Total crustal thickness
Valdes Basin location map
Statistics - Total crustal thickness
Median 30.624
Mean 30.866
Scale 2.055
stdev 1.737
Z_min/Location 28.660/-42.4333°Lat -61.7°Lon
Z_max/Location 36.011/ -41.1°Lat -65.2333°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 upper crust
Valdes Basin location map
Statistics - Base upper crust
Median -11.031
Mean -11.018
Scale 0.079
stdev 0.157
Z_min/Location -11.542/-42.5667°Lat -65.2333°Lon
Z_max/Location -10.541/ -41.0667°Lat -63.7°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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Thermal lithospheric thickness
Valdes Basin location map
Statistics - Thermal lithospheric thickness
Median 111.946
Mean 112.356
Scale 1.971
stdev 2.004
Z_min/Location 110.000/-41.0°Lat -65.0°Lon
Z_max/Location 120.336/ -42.1°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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Heatflow
Valdes Basin location map
Statistics - Heatflow
Median 77.773
Mean 77.254
Scale 4.713
stdev 4.261
Z_min/Location 68.833/-40.7333°Lat -64.7667°Lon
Z_max/Location 85.573/ -43.9°Lat -62.5333°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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Topography (ETOPO2)
Valdes Basin location map
Statistics - Topography (ETOPO2)
Median -56.000
Mean -45.482
Scale 38.548
stdev 56.244
Z_min/Location -174.000/-41.6°Lat -64.5°Lon
Z_max/Location 141.000/ -42.9°Lat -65.3333°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
Valdes Basin location map
Statistics - Base hard sediments
Median -1.043
Mean -0.973
Scale 0.069
stdev 0.155
Z_min/Location -1.097/-42.9°Lat -62.7333°Lon
Z_max/Location -0.367/ -41.0333°Lat -65.2333°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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Temperature at 50km depth
Valdes Basin location map
Statistics - Temperature at 50km depth
Median 780.323
Mean 778.875
Scale 6.725
stdev 6.945
Z_min/Location 750.924/-42.1°Lat -61.7667°Lon
Z_max/Location 787.000/ -41.0°Lat -65.0°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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Laske sediment thickness
Valdes Basin location map
Statistics - Laske sediment thickness
Median 0.799
Mean 0.718
Scale 0.443
stdev 0.340
Z_min/Location 0.148/-41.2°Lat -65.2°Lon
Z_max/Location 1.324/ -42.0333°Lat -62.9333°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
Valdes Basin location map
Statistics - Lithospheric temperature gradient
Median 8.420
Mean 8.396
Scale 0.128
stdev 0.125
Z_min/Location 7.950/-42.1°Lat -61.7667°Lon
Z_max/Location 8.556/ -41.0°Lat -65.0°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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Computations

Isostatic correction
Valdes Basin location map
Statistics - Isostatic correction
Median 0.340
Mean 0.305
Scale 0.184
stdev 0.143
Z_min/Location 0.064/-41.2°Lat -65.2°Lon
Z_max/Location 0.557/-42.0333°Lat -62.9333°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)
Valdes Basin location map
Statistics - TTS (sediment)
Median 0.677
Mean 0.668
Scale 0.085
stdev 0.091
Z_min/Location 0.298/-41.0333°Lat -65.2333°Lon
Z_max/Location 0.839/-41.0333°Lat -63.9333°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)
Valdes Basin location map
Statistics - Beta (Sediment)
Median 1.095
Mean 1.094
Scale 0.013
stdev 0.014
Z_min/Location 1.040/-41.0333°Lat -65.2333°Lon
Z_max/Location 1.120/-41.0333°Lat -63.9333°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.
Valdes Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.044
Mean -0.045
Scale 0.072
stdev 0.065
Z_min/Location -0.196/-41.1°Lat -65.2333°Lon
Z_max/Location 0.112/-42.1°Lat -61.7667°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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Anomalous TTS
Valdes Basin location map
Statistics - Anomalous TTS
Median 0.904
Mean 0.965
Scale 0.645
stdev 0.474
Z_min/Location 0.302/-42.1667°Lat -61.6°Lon
Z_max/Location 2.097/-41.2°Lat -65.2°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
Valdes Basin location map
Statistics - Predicted elevation
Median 916.164
Mean 921.380
Scale 199.768
stdev 183.237
Z_min/Location 503.809/-42.1°Lat -61.7667°Lon
Z_max/Location 1368.100/-41.1°Lat -65.2333°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)
Valdes Basin location map
Statistics - Beta (Crust)
Median 0.973
Mean 0.967
Scale 0.069
stdev 0.056
Z_min/Location 0.814/-41.1°Lat -65.2333°Lon
Z_max/Location 1.041/-42.4333°Lat -61.7°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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TTS (crust)
Valdes Basin location map
Statistics - TTS (crust)
Median -0.218
Mean -0.296
Scale 0.565
stdev 0.490
Z_min/Location -1.781/-41.1°Lat -65.2333°Lon
Z_max/Location 0.304/-42.4333°Lat -61.7°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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Differential Beta
Valdes Basin location map
Statistics - Differential Beta
Median 0.124
Mean 0.127
Scale 0.083
stdev 0.055
Z_min/Location 0.043/-42.1667°Lat -61.6°Lon
Z_max/Location 0.229/-41.3°Lat -65.1°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