ICONS atlas: SAM - Macachin Basin

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Overview

This page bundles the available data for the Macachin 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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Macachin Basin location map
Basin name Macachin Basin
Region code SAM
Basin ID 2290
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.

Macachin Basin cross section
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Dynamic topography evolution for basin centroid
Macachin 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
Macachin Basin location map
Statistics - Mantle Lid thickness
Median 99.327
Mean 98.817
Scale 2.432
stdev 2.327
Z_min/Location 92.687/-38.3667°Lat -63.8°Lon
Z_max/Location 102.214/ -36.4667°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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Depth of 550 deg isotherm
Macachin Basin location map
Statistics - Depth of 550 deg isotherm
Median -41.448
Mean -41.221
Scale 0.448
stdev 0.572
Z_min/Location -41.867/-36.9667°Lat -63.9°Lon
Z_max/Location -39.676/ -38.3667°Lat -63.8°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
Macachin Basin location map
Statistics - Mobil isopachs
Median 1.012
Mean 1.010
Scale 0.018
stdev 0.021
Z_min/Location 0.915/-38.3667°Lat -63.8°Lon
Z_max/Location 1.042/ -37.9°Lat -63.5°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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Plain crustal thickness
Macachin Basin location map
Statistics - Plain crustal thickness
Median 40.545
Mean 40.373
Scale 0.417
stdev 0.580
Z_min/Location 38.439/-38.4667°Lat -63.5333°Lon
Z_max/Location 41.141/ -37.5333°Lat -62.9667°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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Base middle crust
Macachin Basin location map
Statistics - Base middle crust
Median -32.447
Mean -32.276
Scale 0.480
stdev 0.626
Z_min/Location -33.160/-37.5333°Lat -62.9667°Lon
Z_max/Location -30.198/ -38.4667°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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Base lower crust
Macachin Basin location map
Statistics - Base lower crust
Median -41.390
Mean -41.237
Scale 0.438
stdev 0.566
Z_min/Location -42.034/-37.5333°Lat -62.9667°Lon
Z_max/Location -39.356/ -38.4667°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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Total crustal thickness
Macachin Basin location map
Statistics - Total crustal thickness
Median 41.546
Mean 41.373
Scale 0.418
stdev 0.583
Z_min/Location 39.435/-38.4667°Lat -63.5333°Lon
Z_max/Location 42.150/ -37.5333°Lat -62.9667°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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Base upper crust
Macachin Basin location map
Statistics - Base upper crust
Median -17.206
Mean -17.110
Scale 0.298
stdev 0.370
Z_min/Location -17.654/-37.5333°Lat -62.9667°Lon
Z_max/Location -15.889/ -38.4667°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
Macachin Basin location map
Statistics - Thermal lithospheric thickness
Median 141.084
Mean 140.190
Scale 2.590
stdev 2.780
Z_min/Location 132.472/-38.3667°Lat -63.8°Lon
Z_max/Location 143.622/ -37.1333°Lat -63.2°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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Heatflow
Macachin Basin location map
Statistics - Heatflow
Median 66.115
Mean 65.946
Scale 1.168
stdev 0.994
Z_min/Location 63.658/-36.3667°Lat -63.5°Lon
Z_max/Location 67.481/ -38.2°Lat -63.9333°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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Topography (ETOPO2)
Macachin Basin location map
Statistics - Topography (ETOPO2)
Median 138.000
Mean 142.752
Scale 31.135
stdev 43.472
Z_min/Location -19.000/-38.3667°Lat -63.4333°Lon
Z_max/Location 240.000/ -37.7333°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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Base hard sediments
Macachin Basin location map
Statistics - Base hard sediments
Median -0.872
Mean -0.865
Scale 0.041
stdev 0.037
Z_min/Location -0.917/-38.4667°Lat -63.5°Lon
Z_max/Location -0.785/ -36.4667°Lat -63.7667°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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Temperature at 50km depth
Macachin Basin location map
Statistics - Temperature at 50km depth
Median 673.733
Mean 676.883
Scale 9.479
stdev 10.058
Z_min/Location 664.292/-37.1333°Lat -63.2°Lon
Z_max/Location 704.443/ -38.3667°Lat -63.8°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
Macachin Basin location map
Statistics - Laske sediment thickness
Median 0.722
Mean 0.760
Scale 0.333
stdev 0.263
Z_min/Location 0.444/-38.1333°Lat -63.3333°Lon
Z_max/Location 1.375/ -37.0333°Lat -63.2667°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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Lithospheric temperature gradient
Macachin Basin location map
Statistics - Lithospheric temperature gradient
Median 6.994
Mean 7.030
Scale 0.159
stdev 0.144
Z_min/Location 6.836/-36.5667°Lat -63.4°Lon
Z_max/Location 7.374/ -38.0333°Lat -63.9667°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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Computations

Isostatic correction
Macachin Basin location map
Statistics - Isostatic correction
Median 0.308
Mean 0.323
Scale 0.140
stdev 0.110
Z_min/Location 0.191/-38.1333°Lat -63.3333°Lon
Z_max/Location 0.577/-37.0333°Lat -63.2667°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)
Macachin Basin location map
Statistics - TTS (sediment)
Median 0.564
Mean 0.541
Scale 0.185
stdev 0.138
Z_min/Location 0.266/-36.9667°Lat -63.3°Lon
Z_max/Location 0.716/-38.1667°Lat -63.3°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)
Macachin Basin location map
Statistics - Beta (Sediment)
Median 1.078
Mean 1.075
Scale 0.028
stdev 0.020
Z_min/Location 1.035/-36.9667°Lat -63.3°Lon
Z_max/Location 1.101/-38.1667°Lat -63.3°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.
Macachin Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.008
Mean -0.008
Scale 0.013
stdev 0.012
Z_min/Location -0.032/-38.2°Lat -63.9333°Lon
Z_max/Location 0.019/-36.3667°Lat -63.5°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
Macachin Basin location map
Statistics - Anomalous TTS
Median 0.578
Mean 0.563
Scale 0.142
stdev 0.118
Z_min/Location 0.322/-36.5667°Lat -63.4°Lon
Z_max/Location 0.767/-37.8667°Lat -63.0667°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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Predicted elevation
Macachin Basin location map
Statistics - Predicted elevation
Median 1251.880
Mean 1251.860
Scale 31.266
stdev 27.829
Z_min/Location 1185.860/-36.3667°Lat -63.5°Lon
Z_max/Location 1305.750/-38.2°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 (Crust)
Macachin Basin location map
Statistics - Beta (Crust)
Median 0.993
Mean 0.997
Scale 0.010
stdev 0.015
Z_min/Location 0.979/-37.5333°Lat -62.9667°Lon
Z_max/Location 1.047/-38.4667°Lat -63.5333°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)
Macachin Basin location map
Statistics - TTS (crust)
Median -0.056
Mean -0.022
Scale 0.081
stdev 0.113
Z_min/Location -0.171/-37.5333°Lat -62.9667°Lon
Z_max/Location 0.353/-38.4667°Lat -63.5333°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
Macachin Basin location map
Statistics - Differential Beta
Median 0.079
Mean 0.077
Scale 0.020
stdev 0.017
Z_min/Location 0.043/-36.5667°Lat -63.4°Lon
Z_max/Location 0.106/-37.9°Lat -63.1°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