ICONS atlas: SAM - Cretaceous Basin

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Overview

This page bundles the available data for the Cretaceous 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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Cretaceous Basin location map
Basin name Cretaceous Basin
Region code SAM
Basin ID 2620
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.

Cretaceous Basin cross section
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Dynamic topography evolution for basin centroid
Cretaceous 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
Cretaceous Basin location map
Statistics - Mantle Lid thickness
Median 100.514
Mean 96.809
Scale 6.155
stdev 8.589
Z_min/Location 74.470/-24.9°Lat -65.2667°Lon
Z_max/Location 105.000/ -23.0°Lat -60.0°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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Depth of 550 deg isotherm
Cretaceous Basin location map
Statistics - Depth of 550 deg isotherm
Median -41.457
Mean -41.216
Scale 0.806
stdev 0.760
Z_min/Location -42.001/-22.5333°Lat -59.5667°Lon
Z_max/Location -40.000/ -24.0°Lat -64.0°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
Cretaceous Basin location map
Statistics - Mobil isopachs
Median 5.534
Mean 4.492
Scale 1.366
stdev 1.921
Z_min/Location -0.477/-24.1333°Lat -65.2°Lon
Z_max/Location 6.907/ -22.8333°Lat -61.3667°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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Plain crustal thickness
Cretaceous Basin location map
Statistics - Plain crustal thickness
Median 38.709
Mean 41.070
Scale 3.420
stdev 5.124
Z_min/Location 35.334/-22.0333°Lat -61.3667°Lon
Z_max/Location 57.278/ -24.9°Lat -65.2667°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
Cretaceous Basin location map
Statistics - Base middle crust
Median -32.409
Mean -33.014
Scale 1.399
stdev 1.600
Z_min/Location -37.278/-24.9667°Lat -65.2667°Lon
Z_max/Location -31.166/ -22.0333°Lat -61.3667°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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Base lower crust
Cretaceous Basin location map
Statistics - Base lower crust
Median -41.386
Mean -43.259
Scale 1.507
stdev 3.576
Z_min/Location -55.724/-24.9667°Lat -65.2667°Lon
Z_max/Location -40.237/ -22.1333°Lat -61.3667°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
Cretaceous Basin location map
Statistics - Total crustal thickness
Median 41.749
Mean 43.954
Scale 1.903
stdev 4.256
Z_min/Location 40.324/-22.2333°Lat -61.3333°Lon
Z_max/Location 58.317/ -24.9°Lat -65.2667°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 upper crust
Cretaceous Basin location map
Statistics - Base upper crust
Median -17.496
Mean -17.525
Scale 0.674
stdev 0.582
Z_min/Location -19.113/-22.8°Lat -63.3°Lon
Z_max/Location -16.511/ -24.6°Lat -64.0333°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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Thermal lithospheric thickness
Cretaceous Basin location map
Statistics - Thermal lithospheric thickness
Median 142.185
Mean 140.762
Scale 4.861
stdev 4.510
Z_min/Location 132.081/-24.0333°Lat -65.0333°Lon
Z_max/Location 146.000/ -23.0°Lat -60.0°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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Heatflow
Cretaceous Basin location map
Statistics - Heatflow
Median 72.269
Mean 69.646
Scale 5.633
stdev 6.166
Z_min/Location 58.750/-23.2°Lat -64.0333°Lon
Z_max/Location 76.894/ -22.1333°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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Topography (ETOPO2)
Cretaceous Basin location map
Statistics - Topography (ETOPO2)
Median 198.000
Mean 316.005
Scale 83.026
stdev 303.461
Z_min/Location 75.000/-23.0333°Lat -58.9°Lon
Z_max/Location 2369.000/ -24.4333°Lat -64.4667°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
Cretaceous Basin location map
Statistics - Base hard sediments
Median -2.534
Mean -2.189
Scale 1.901
stdev 1.643
Z_min/Location -4.909/-22.0667°Lat -61.4667°Lon
Z_max/Location 1.880/ -24.1333°Lat -65.2°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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Temperature at 50km depth
Cretaceous Basin location map
Statistics - Temperature at 50km depth
Median 668.642
Mean 673.533
Scale 13.960
stdev 13.690
Z_min/Location 658.997/-23.1667°Lat -58.8333°Lon
Z_max/Location 698.966/ -24.1°Lat -65.1667°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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Laske sediment thickness
Cretaceous Basin location map
Statistics - Laske sediment thickness
Median 3.666
Mean 3.695
Scale 0.964
stdev 1.483
Z_min/Location 0.036/-24.1°Lat -65.1667°Lon
Z_max/Location 8.304/ -23.0333°Lat -63.7333°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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Lithospheric temperature gradient
Cretaceous Basin location map
Statistics - Lithospheric temperature gradient
Median 6.904
Mean 6.911
Scale 0.239
stdev 0.173
Z_min/Location 6.678/-23.0°Lat -60.0°Lon
Z_max/Location 7.352/ -24.0333°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
Cretaceous Basin location map
Statistics - Isostatic correction
Median 1.452
Mean 1.440
Scale 0.344
stdev 0.522
Z_min/Location 0.015/-24.1°Lat -65.1667°Lon
Z_max/Location 2.889/-23.0333°Lat -63.7333°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)
Cretaceous Basin location map
Statistics - TTS (sediment)
Median 1.079
Mean 0.749
Scale 2.027
stdev 1.508
Z_min/Location -2.220/-23.2°Lat -64.0333°Lon
Z_max/Location 3.196/-22.1°Lat -61.5667°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 (Sediment)
Cretaceous Basin location map
Statistics - Beta (Sediment)
Median 1.160
Mean 1.159
Scale 0.344
stdev 0.250
Z_min/Location 0.779/-23.2°Lat -64.0333°Lon
Z_max/Location 1.691/-22.1°Lat -61.5667°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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Crustal vs lithosph. extn.
Cretaceous Basin location map
Statistics - Crustal vs lithosph. extn.
Median 0.160
Mean 0.093
Scale 0.119
stdev 0.149
Z_min/Location -0.276/-24.9°Lat -65.2667°Lon
Z_max/Location 0.269/-22.0°Lat -61.1333°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
Cretaceous Basin location map
Statistics - Anomalous TTS
Median 0.472
Mean 0.372
Scale 0.956
stdev 0.810
Z_min/Location -1.682/-23.1333°Lat -63.9°Lon
Z_max/Location 1.789/-22.1°Lat -61.5667°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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Predicted elevation
Cretaceous Basin location map
Statistics - Predicted elevation
Median 1236.020
Mean 1331.670
Scale 166.697
stdev 218.838
Z_min/Location 1116.180/-22.0°Lat -61.0°Lon
Z_max/Location 1728.290/-24.0°Lat -64.9333°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 (Crust)
Cretaceous Basin location map
Statistics - Beta (Crust)
Median 1.115
Mean 1.065
Scale 0.101
stdev 0.119
Z_min/Location 0.753/-24.9°Lat -65.2667°Lon
Z_max/Location 1.221/-22.0333°Lat -61.3667°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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TTS (crust)
Cretaceous Basin location map
Statistics - TTS (crust)
Median 0.805
Mean 0.377
Scale 0.620
stdev 0.929
Z_min/Location -2.560/-24.9°Lat -65.2667°Lon
Z_max/Location 1.416/-22.0333°Lat -61.3667°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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Differential Beta
Cretaceous Basin location map
Statistics - Differential Beta
Median 0.062
Mean 0.093
Scale 0.176
stdev 0.153
Z_min/Location -0.160/-23.1°Lat -63.8333°Lon
Z_max/Location 0.472/-22.1°Lat -61.5667°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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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