ICONS atlas: SUN - Mekong Basin

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Overview

This page bundles the available data for the Mekong Basin in the Sundaland Region. 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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Mekong Basin location map

Basin name	Mekong Basin
Region code	SUN
Basin ID	6670
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.

Mekong Basin cross section

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Dynamic topography evolution for basin centroid

Mekong 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

Mekong Basin location map

Statistics - Mantle Lid thickness
Median	89.567
Mean	89.631
Scale	1.821
stdev	1.547
Z_min/Location	86.598/11.6667°Lat 105.9°Lon
Z_max/Location	92.707/ 10.7667°Lat 105.7°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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Depth of 550 deg isotherm

Mekong Basin location map

Statistics - Depth of 550 deg isotherm
Median	-38.833
Mean	-38.803
Scale	0.159
stdev	0.138
Z_min/Location	-39.000/11.0°Lat 106.0°Lon
Z_max/Location	-38.458/ 10.8667°Lat 105.433°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

Mekong Basin location map

Statistics - Mobil isopachs
Median	0.615
Mean	0.581
Scale	0.229
stdev	0.199
Z_min/Location	0.110/11.5333°Lat 106.167°Lon
Z_max/Location	0.888/ 11.4°Lat 105.233°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

Mekong Basin location map

Statistics - Plain crustal thickness
Median	35.158
Mean	35.145
Scale	1.835
stdev	1.607
Z_min/Location	31.832/10.8°Lat 105.533°Lon
Z_max/Location	38.317/ 11.6667°Lat 105.9°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 middle crust

Mekong Basin location map

Statistics - Base middle crust
Median	-27.312
Mean	-27.363
Scale	1.682
stdev	1.493
Z_min/Location	-30.396/11.5667°Lat 106.133°Lon
Z_max/Location	-24.327/ 10.8°Lat 105.533°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

Mekong Basin location map

Statistics - Base lower crust
Median	-36.110
Mean	-36.093
Scale	1.847
stdev	1.613
Z_min/Location	-39.282/11.6667°Lat 105.9°Lon
Z_max/Location	-32.804/ 10.8°Lat 105.533°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

Mekong Basin location map

Statistics - Total crustal thickness
Median	36.124
Mean	36.110
Scale	1.851
stdev	1.617
Z_min/Location	32.808/10.8°Lat 105.533°Lon
Z_max/Location	39.305/ 11.6667°Lat 105.9°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 upper crust

Mekong Basin location map

Statistics - Base upper crust
Median	-14.360
Mean	-14.404
Scale	0.942
stdev	0.826
Z_min/Location	-16.120/11.5667°Lat 106.133°Lon
Z_max/Location	-12.750/ 10.8°Lat 105.533°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

Mekong Basin location map

Statistics - Thermal lithospheric thickness
Median	125.782
Mean	125.740
Scale	0.184
stdev	0.170
Z_min/Location	125.266/11.4°Lat 105.233°Lon
Z_max/Location	126.000/ 11.0°Lat 106.0°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

Mekong Basin location map

Statistics - Heatflow
Median	87.169
Mean	87.120
Scale	2.354
stdev	2.092
Z_min/Location	82.781/11.6667°Lat 105.9°Lon
Z_max/Location	91.691/ 10.8333°Lat 105.467°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)

Mekong Basin location map

Statistics - Topography (ETOPO2)
Median	9.000
Mean	12.452
Scale	7.413
stdev	13.974
Z_min/Location	2.000/10.9°Lat 105.833°Lon
Z_max/Location	205.000/ 11.4°Lat 106.133°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

Mekong Basin location map

Statistics - Base hard sediments
Median	-0.951
Mean	-0.948
Scale	0.013
stdev	0.014
Z_min/Location	-0.990/10.8667°Lat 105.433°Lon
Z_max/Location	-0.918/ 10.8°Lat 105.967°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

Mekong Basin location map

Statistics - Temperature at 50km depth
Median	723.528
Mean	723.625
Scale	0.449
stdev	0.410
Z_min/Location	723.000/11.0°Lat 106.0°Lon
Z_max/Location	724.919/ 11.4333°Lat 105.233°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

Mekong Basin location map

Statistics - Laske sediment thickness
Median	0.531
Mean	0.514
Scale	0.169
stdev	0.154
Z_min/Location	0.195/11.6667°Lat 105.3°Lon
Z_max/Location	0.801/ 10.8667°Lat 106.233°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

Mekong Basin location map

Statistics - Lithospheric temperature gradient
Median	7.620
Mean	7.624
Scale	0.018
stdev	0.017
Z_min/Location	7.598/11.0°Lat 106.0°Lon
Z_max/Location	7.672/ 11.4°Lat 105.233°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

Mekong Basin location map

Statistics - Isostatic correction
Median	0.228
Mean	0.220
Scale	0.071
stdev	0.065
Z_min/Location	0.084/11.6667°Lat 105.3°Lon
Z_max/Location	0.341/10.8667°Lat 106.233°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)

Mekong Basin location map

Statistics - TTS (sediment)
Median	0.724
Mean	0.728
Scale	0.089
stdev	0.077
Z_min/Location	0.588/10.8°Lat 106.033°Lon
Z_max/Location	0.875/11.4°Lat 105.233°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)

Mekong Basin location map

Statistics - Beta (Sediment)
Median	1.102
Mean	1.103
Scale	0.014
stdev	0.012
Z_min/Location	1.081/10.8°Lat 106.033°Lon
Z_max/Location	1.126/11.4°Lat 105.233°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.

Mekong Basin location map

Statistics - Crustal vs lithosph. extn.
Median	-0.024
Mean	-0.022
Scale	0.051
stdev	0.044
Z_min/Location	-0.104/11.6667°Lat 105.9°Lon
Z_max/Location	0.075/10.8°Lat 105.533°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

Mekong Basin location map

Statistics - Anomalous TTS
Median	0.950
Mean	0.922
Scale	0.469
stdev	0.397
Z_min/Location	0.124/10.7667°Lat 105.7°Lon
Z_max/Location	1.684/11.6667°Lat 105.9°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

Mekong Basin location map

Statistics - Predicted elevation
Median	1123.800
Mean	1117.110
Scale	150.498
stdev	131.117
Z_min/Location	833.267/10.8°Lat 105.533°Lon
Z_max/Location	1357.500/11.6667°Lat 105.9°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)

Mekong Basin location map

Statistics - Beta (Crust)
Median	0.975
Mean	0.978
Scale	0.051
stdev	0.045
Z_min/Location	0.895/11.6667°Lat 105.9°Lon
Z_max/Location	1.077/10.8°Lat 105.533°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)

Mekong Basin location map

Statistics - TTS (crust)
Median	-0.197
Mean	-0.194
Scale	0.418
stdev	0.367
Z_min/Location	-0.917/11.6667°Lat 105.9°Lon
Z_max/Location	0.562/10.8°Lat 105.533°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

Mekong Basin location map

Statistics - Differential Beta
Median	0.131
Mean	0.125
Scale	0.059
stdev	0.050
Z_min/Location	0.019/10.7667°Lat 105.7°Lon
Z_max/Location	0.214/11.6667°Lat 105.9°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 02:36:58 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia