ICONS atlas: CHN - Sichuan (Szechwan) Basin

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Overview

This page bundles the available data for the Sichuan (Szechwan) Basin in the China. 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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Sichuan (Szechwan) Basin location map
Basin name Sichuan (Szechwan) Basin
Region code CHN
Basin ID 6010
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.

Sichuan (Szechwan) Basin cross section
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Dynamic topography evolution for basin centroid
Sichuan (Szechwan) 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
Sichuan (Szechwan) Basin location map
Statistics - Mantle Lid thickness
Median 92.742
Mean 93.990
Scale 14.798
stdev 13.095
Z_min/Location 65.938/32.0°Lat 107.0°Lon
Z_max/Location 122.476/ 30.9°Lat 103.333°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
Sichuan (Szechwan) Basin location map
Statistics - Depth of 550 deg isotherm
Median -39.620
Mean -39.936
Scale 2.934
stdev 2.698
Z_min/Location -46.098/30.7667°Lat 103.233°Lon
Z_max/Location -35.000/ 32.0°Lat 107.0°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
Sichuan (Szechwan) Basin location map
Statistics - Mobil isopachs
Median 3.227
Mean 3.589
Scale 0.908
stdev 1.204
Z_min/Location 0.709/32.4667°Lat 105.8°Lon
Z_max/Location 6.772/ 31.7°Lat 107.367°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
Sichuan (Szechwan) Basin location map
Statistics - Plain crustal thickness
Median 35.383
Mean 36.538
Scale 2.973
stdev 3.406
Z_min/Location 30.547/31.2333°Lat 109.733°Lon
Z_max/Location 46.960/ 29.8°Lat 102.6°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
Sichuan (Szechwan) Basin location map
Statistics - Base middle crust
Median -28.367
Mean -29.656
Scale 1.969
stdev 3.012
Z_min/Location -38.417/31.4°Lat 104.0°Lon
Z_max/Location -24.262/ 31.2°Lat 109.733°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
Sichuan (Szechwan) Basin location map
Statistics - Base lower crust
Median -40.575
Mean -40.651
Scale 0.576
stdev 1.067
Z_min/Location -44.636/29.8°Lat 102.6°Lon
Z_max/Location -34.714/ 31.2333°Lat 109.733°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
Sichuan (Szechwan) Basin location map
Statistics - Total crustal thickness
Median 41.386
Mean 41.693
Scale 0.730
stdev 1.440
Z_min/Location 35.646/31.2333°Lat 109.733°Lon
Z_max/Location 47.759/ 29.8°Lat 102.6°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
Sichuan (Szechwan) Basin location map
Statistics - Base upper crust
Median -16.218
Mean -16.271
Scale 1.058
stdev 1.078
Z_min/Location -19.513/31.5667°Lat 104.333°Lon
Z_max/Location -13.904/ 31.2°Lat 109.733°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
Sichuan (Szechwan) Basin location map
Statistics - Thermal lithospheric thickness
Median 133.422
Mean 135.683
Scale 15.149
stdev 14.117
Z_min/Location 107.000/32.0°Lat 107.0°Lon
Z_max/Location 168.839/ 30.9°Lat 103.333°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
Sichuan (Szechwan) Basin location map
Statistics - Heatflow
Median 54.048
Mean 54.482
Scale 1.741
stdev 1.784
Z_min/Location 52.064/30.2667°Lat 106.1°Lon
Z_max/Location 61.555/ 29.8°Lat 102.6°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)
Sichuan (Szechwan) Basin location map
Statistics - Topography (ETOPO2)
Median 481.000
Mean 566.060
Scale 186.808
stdev 273.892
Z_min/Location 59.000/31.0°Lat 109.367°Lon
Z_max/Location 2277.000/ 29.7667°Lat 102.9°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
Sichuan (Szechwan) Basin location map
Statistics - Base hard sediments
Median -4.857
Mean -4.113
Scale 2.859
stdev 2.796
Z_min/Location -8.364/31.7333°Lat 106.767°Lon
Z_max/Location 2.324/ 29.8°Lat 102.6°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
Sichuan (Szechwan) Basin location map
Statistics - Temperature at 50km depth
Median 704.110
Mean 701.238
Scale 52.922
stdev 46.608
Z_min/Location 605.119/30.7667°Lat 103.233°Lon
Z_max/Location 805.000/ 32.0°Lat 107.0°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
Sichuan (Szechwan) Basin location map
Statistics - Laske sediment thickness
Median 6.631
Mean 6.372
Scale 1.680
stdev 1.723
Z_min/Location -0.351/30.1333°Lat 102.767°Lon
Z_max/Location 9.723/ 31.8667°Lat 106.733°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
Sichuan (Szechwan) Basin location map
Statistics - Lithospheric temperature gradient
Median 7.026
Mean 7.040
Scale 0.648
stdev 0.553
Z_min/Location 5.074/32.0°Lat 105.0°Lon
Z_max/Location 8.640/ 31.0°Lat 107.0°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
Sichuan (Szechwan) Basin location map
Statistics - Isostatic correction
Median 2.422
Mean 2.315
Scale 0.501
stdev 0.547
Z_min/Location 0.000/30.3667°Lat 102.933°Lon
Z_max/Location 3.239/31.8667°Lat 106.733°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)
Sichuan (Szechwan) Basin location map
Statistics - TTS (sediment)
Median 2.575
Mean 1.798
Scale 2.451
stdev 2.424
Z_min/Location -3.202/28.3667°Lat 103.933°Lon
Z_max/Location 5.214/31.5°Lat 106.833°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)
Sichuan (Szechwan) Basin location map
Statistics - Beta (Sediment)
Median 1.491
Mean 1.527
Scale 0.696
stdev 0.612
Z_min/Location 0.710/28.3667°Lat 103.933°Lon
Z_max/Location 3.001/31.5°Lat 106.833°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.
Sichuan (Szechwan) Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.036
Mean -0.043
Scale 0.044
stdev 0.042
Z_min/Location -0.190/32.0°Lat 107.0°Lon
Z_max/Location 0.069/31.0°Lat 109.0°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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Anomalous TTS
Sichuan (Szechwan) Basin location map
Statistics - Anomalous TTS
Median 2.583
Mean 2.101
Scale 1.880
stdev 1.720
Z_min/Location -1.571/28.3°Lat 104.033°Lon
Z_max/Location 4.633/31.3333°Lat 107.033°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
Sichuan (Szechwan) Basin location map
Statistics - Predicted elevation
Median 1335.300
Mean 1351.340
Scale 216.137
stdev 186.430
Z_min/Location 1007.290/30.0°Lat 104.0°Lon
Z_max/Location 1772.320/32.0°Lat 107.0°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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Beta (Crust)
Sichuan (Szechwan) Basin location map
Statistics - Beta (Crust)
Median 0.994
Mean 0.971
Scale 0.085
stdev 0.085
Z_min/Location 0.749/29.8°Lat 102.6°Lon
Z_max/Location 1.152/31.2333°Lat 109.733°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)
Sichuan (Szechwan) Basin location map
Statistics - TTS (crust)
Median -0.046
Mean -0.303
Scale 0.661
stdev 0.757
Z_min/Location -2.619/29.8°Lat 102.6°Lon
Z_max/Location 1.029/31.2333°Lat 109.733°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
Sichuan (Szechwan) Basin location map
Statistics - Differential Beta
Median 0.490
Mean 0.556
Scale 0.596
stdev 0.539
Z_min/Location -0.119/28.3°Lat 104.067°Lon
Z_max/Location 1.914/31.5°Lat 106.833°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 02:36:44 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia