ICONS atlas: SAM - Malvinas Basin

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Overview

This page bundles the available data for the Malvinas 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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Malvinas Basin location map
Basin name Malvinas Basin
Region code SAM
Basin ID 2070
Plate location/code compress foreland/CMF
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.

Malvinas Basin cross section
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Dynamic topography evolution for basin centroid
Malvinas 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
Malvinas Basin location map
Statistics - Mantle Lid thickness
Median 66.230
Mean 66.433
Scale 0.977
stdev 1.187
Z_min/Location 64.542/-53.6333°Lat -66.4333°Lon
Z_max/Location 70.694/ -52.4667°Lat -66.3667°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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Depth of 550 deg isotherm
Malvinas Basin location map
Statistics - Depth of 550 deg isotherm
Median -32.984
Mean -32.980
Scale 0.163
stdev 0.166
Z_min/Location -33.439/-52.4667°Lat -66.3667°Lon
Z_max/Location -32.613/ -53.6333°Lat -66.4333°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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Mobil isopachs
Malvinas Basin location map
Statistics - Mobil isopachs
Median 3.998
Mean 3.225
Scale 1.612
stdev 2.010
Z_min/Location -0.889/-51.6°Lat -62.8333°Lon
Z_max/Location 7.397/ -53.7°Lat -61.1°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
Malvinas Basin location map
Statistics - Plain crustal thickness
Median 28.751
Mean 28.929
Scale 1.645
stdev 1.382
Z_min/Location 27.342/-51.6°Lat -63.7°Lon
Z_max/Location 32.093/ -53.5667°Lat -64.2667°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
Malvinas Basin location map
Statistics - Base middle crust
Median -23.330
Mean -23.295
Scale 1.781
stdev 1.457
Z_min/Location -26.387/-53.5667°Lat -58.9333°Lon
Z_max/Location -20.977/ -51.1667°Lat -66.0667°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
Malvinas Basin location map
Statistics - Base lower crust
Median -32.220
Mean -31.846
Scale 2.308
stdev 1.886
Z_min/Location -35.094/-53.4667°Lat -58.8333°Lon
Z_max/Location -28.683/ -50.9°Lat -65.7667°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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Total crustal thickness
Malvinas Basin location map
Statistics - Total crustal thickness
Median 31.637
Mean 31.304
Scale 1.704
stdev 1.524
Z_min/Location 28.573/-50.8667°Lat -65.7667°Lon
Z_max/Location 33.711/ -53.4333°Lat -64.3°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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Base upper crust
Malvinas Basin location map
Statistics - Base upper crust
Median -13.220
Mean -13.187
Scale 1.569
stdev 1.345
Z_min/Location -16.166/-53.6°Lat -59.1333°Lon
Z_max/Location -10.997/ -51.1667°Lat -66.2°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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Thermal lithospheric thickness
Malvinas Basin location map
Statistics - Thermal lithospheric thickness
Median 99.110
Mean 99.107
Scale 0.831
stdev 0.777
Z_min/Location 97.506/-53.6333°Lat -66.4333°Lon
Z_max/Location 101.006/ -52.4667°Lat -66.3667°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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Heatflow
Malvinas Basin location map
Statistics - Heatflow
Median 82.443
Mean 80.374
Scale 1.863
stdev 4.307
Z_min/Location 63.411/-52.1°Lat -56.6333°Lon
Z_max/Location 84.493/ -52.2333°Lat -66.4333°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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Topography (ETOPO2)
Malvinas Basin location map
Statistics - Topography (ETOPO2)
Median -181.000
Mean -289.167
Scale 105.265
stdev 252.283
Z_min/Location -2007.000/-53.5333°Lat -58.8667°Lon
Z_max/Location -4.000/ -53.8°Lat -64.1333°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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Base hard sediments
Malvinas Basin location map
Statistics - Base hard sediments
Median -2.970
Mean -2.917
Scale 1.574
stdev 1.217
Z_min/Location -5.615/-53.7333°Lat -59.9333°Lon
Z_max/Location -0.986/ -51.1333°Lat -66.2333°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
Malvinas Basin location map
Statistics - Temperature at 50km depth
Median 840.979
Mean 841.017
Scale 3.493
stdev 3.536
Z_min/Location 831.296/-52.4667°Lat -66.3667°Lon
Z_max/Location 848.460/ -53.6333°Lat -66.4333°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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Laske sediment thickness
Malvinas Basin location map
Statistics - Laske sediment thickness
Median 2.466
Mean 2.888
Scale 1.754
stdev 1.652
Z_min/Location 0.466/-50.2°Lat -63.7°Lon
Z_max/Location 6.883/ -53.7333°Lat -60.9667°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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Lithospheric temperature gradient
Malvinas Basin location map
Statistics - Lithospheric temperature gradient
Median 9.419
Mean 9.420
Scale 0.052
stdev 0.054
Z_min/Location 9.265/-52.4667°Lat -66.3667°Lon
Z_max/Location 9.539/ -53.6333°Lat -66.4333°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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Computations

Isostatic correction
Malvinas Basin location map
Statistics - Isostatic correction
Median 1.008
Mean 1.139
Scale 0.674
stdev 0.604
Z_min/Location 0.200/-50.2°Lat -63.7°Lon
Z_max/Location 2.496/-53.7333°Lat -60.9667°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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TTS (sediment)
Malvinas Basin location map
Statistics - TTS (sediment)
Median 1.664
Mean 1.778
Scale 1.162
stdev 0.875
Z_min/Location 0.286/-53.4°Lat -66.8°Lon
Z_max/Location 3.481/-53.7°Lat -59.8°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 (Sediment)
Malvinas Basin location map
Statistics - Beta (Sediment)
Median 1.270
Mean 1.324
Scale 0.221
stdev 0.204
Z_min/Location 1.038/-53.4°Lat -66.8°Lon
Z_max/Location 1.802/-53.7°Lat -59.8°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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Crustal vs lithosph. extn.
Malvinas Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.074
Mean -0.066
Scale 0.011
stdev 0.019
Z_min/Location -0.088/-53.5667°Lat -66.5333°Lon
Z_max/Location 0.009/-52.4667°Lat -66.3667°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
Malvinas Basin location map
Statistics - Anomalous TTS
Median 1.812
Mean 1.818
Scale 0.964
stdev 0.861
Z_min/Location 0.212/-51.4333°Lat -65.9°Lon
Z_max/Location 3.662/-53.2333°Lat -59.0°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
Malvinas Basin location map
Statistics - Predicted elevation
Median 1266.370
Mean 1244.870
Scale 50.897
stdev 66.200
Z_min/Location 979.211/-52.4667°Lat -66.3667°Lon
Z_max/Location 1309.850/-53.5667°Lat -65.1667°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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Beta (Crust)
Malvinas Basin location map
Statistics - Beta (Crust)
Median 1.001
Mean 0.997
Scale 0.059
stdev 0.046
Z_min/Location 0.897/-53.5667°Lat -64.2667°Lon
Z_max/Location 1.053/-51.6°Lat -63.7°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)
Malvinas Basin location map
Statistics - TTS (crust)
Median 0.009
Mean -0.039
Scale 0.447
stdev 0.376
Z_min/Location -0.899/-53.5667°Lat -64.2667°Lon
Z_max/Location 0.392/-51.6°Lat -63.7°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
Malvinas Basin location map
Statistics - Differential Beta
Median 0.279
Mean 0.327
Scale 0.213
stdev 0.199
Z_min/Location 0.030/-51.4°Lat -65.9333°Lon
Z_max/Location 0.800/-53.7°Lat -59.8°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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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