ICONS atlas: ARC - Lancaster Basin

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Overview

This page bundles the available data for the Lancaster Basin in the NAM Arctic Basins. 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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Lancaster Basin location map
Basin name Lancaster Basin
Region code ARC
Basin ID 1543
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.

Lancaster Basin cross section
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Dynamic topography evolution for basin centroid
Lancaster 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
Lancaster Basin location map
Statistics - Mantle Lid thickness
Median 155.405
Mean 154.902
Scale 15.803
stdev 15.118
Z_min/Location 123.169/74.5667°Lat -80.6333°Lon
Z_max/Location 194.605/ 73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Depth of 550 deg isotherm
Median -51.813
Mean -52.290
Scale 4.120
stdev 4.170
Z_min/Location -64.877/73.7°Lat -77.8333°Lon
Z_max/Location -44.770/ 74.6°Lat -80.3667°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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Mobil isopachs
Lancaster Basin location map
Statistics - Mobil isopachs
Median 0.185
Mean 0.337
Scale 0.132
stdev 0.360
Z_min/Location 0.026/73.8°Lat -81.2333°Lon
Z_max/Location 1.662/ 74.4°Lat -85.7333°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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Plain crustal thickness
Lancaster Basin location map
Statistics - Plain crustal thickness
Median 37.996
Mean 37.963
Scale 0.033
stdev 0.199
Z_min/Location 36.896/74.5667°Lat -79.1333°Lon
Z_max/Location 38.665/ 73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Base middle crust
Median -25.859
Mean -25.846
Scale 0.115
stdev 0.106
Z_min/Location -26.039/73.9333°Lat -84.0667°Lon
Z_max/Location -25.498/ 74.4°Lat -78.8°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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Base lower crust
Lancaster Basin location map
Statistics - Base lower crust
Median -38.861
Mean -38.838
Scale 0.153
stdev 0.178
Z_min/Location -39.324/73.7°Lat -77.8333°Lon
Z_max/Location -37.979/ 74.5667°Lat -79.1333°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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Total crustal thickness
Lancaster Basin location map
Statistics - Total crustal thickness
Median 39.003
Mean 38.978
Scale 0.036
stdev 0.177
Z_min/Location 38.027/74.5667°Lat -79.1333°Lon
Z_max/Location 39.548/ 73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Base upper crust
Median -13.870
Mean -13.876
Scale 0.111
stdev 0.103
Z_min/Location -14.100/74.3667°Lat -84.0667°Lon
Z_max/Location -13.645/ 73.8°Lat -81.9°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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Thermal lithospheric thickness
Lancaster Basin location map
Statistics - Thermal lithospheric thickness
Median 194.321
Mean 193.880
Scale 15.747
stdev 15.122
Z_min/Location 162.405/74.5667°Lat -80.6333°Lon
Z_max/Location 234.153/ 73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Heatflow
Median 56.592
Mean 56.626
Scale 1.302
stdev 1.002
Z_min/Location 54.794/74.4°Lat -85.7333°Lon
Z_max/Location 58.873/ 73.8°Lat -77.8333°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)
Lancaster Basin location map
Statistics - Topography (ETOPO2)
Median -703.000
Mean -710.321
Scale 93.404
stdev 113.257
Z_min/Location -1048.000/73.7333°Lat -77.9°Lon
Z_max/Location 24.000/ 74.6°Lat -80.3667°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 hard sediments
Lancaster Basin location map
Statistics - Base hard sediments
Median -0.881
Mean -0.874
Scale 0.128
stdev 0.105
Z_min/Location -1.088/74.6°Lat -79.2°Lon
Z_max/Location -0.659/ 73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Temperature at 50km depth
Median 609.089
Mean 609.940
Scale 33.527
stdev 32.242
Z_min/Location 523.586/73.7°Lat -77.8333°Lon
Z_max/Location 676.614/ 74.5667°Lat -80.6333°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
Lancaster Basin location map
Statistics - Laske sediment thickness
Median 1.091
Mean 1.232
Scale 0.863
stdev 0.826
Z_min/Location 0.042/73.7667°Lat -78.8667°Lon
Z_max/Location 3.098/ 74.1667°Lat -83.9°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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Lithospheric temperature gradient
Lancaster Basin location map
Statistics - Lithospheric temperature gradient
Median 5.273
Mean 5.301
Scale 0.287
stdev 0.266
Z_min/Location 4.671/73.7°Lat -77.8333°Lon
Z_max/Location 5.906/ 74.4667°Lat -81.6667°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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Computations

Isostatic correction
Lancaster Basin location map
Statistics - Isostatic correction
Median 0.462
Mean 0.512
Scale 0.357
stdev 0.333
Z_min/Location 0.018/73.7667°Lat -78.8667°Lon
Z_max/Location 1.245/74.1667°Lat -83.9°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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TTS (sediment)
Lancaster Basin location map
Statistics - TTS (sediment)
Median 0.398
Mean 0.362
Scale 0.307
stdev 0.276
Z_min/Location -0.203/74.1°Lat -83.8333°Lon
Z_max/Location 0.793/73.8°Lat -79.2°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)
Lancaster Basin location map
Statistics - Beta (Sediment)
Median 1.054
Mean 1.050
Scale 0.044
stdev 0.038
Z_min/Location 0.975/74.1°Lat -83.8333°Lon
Z_max/Location 1.113/73.8°Lat -79.2°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.
Lancaster Basin location map
Statistics - Crustal vs lithosph. extn.
Median -0.053
Mean -0.063
Scale 0.084
stdev 0.083
Z_min/Location -0.267/74.5667°Lat -80.6333°Lon
Z_max/Location 0.107/73.7°Lat -77.8333°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
Lancaster Basin location map
Statistics - Anomalous TTS
Median 0.380
Mean 0.356
Scale 0.324
stdev 0.283
Z_min/Location -0.205/74.1333°Lat -83.8333°Lon
Z_max/Location 0.835/73.8°Lat -79.0667°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
Lancaster Basin location map
Statistics - Predicted elevation
Median 300.665
Mean 303.667
Scale 290.803
stdev 278.700
Z_min/Location -444.984/73.7°Lat -77.8333°Lon
Z_max/Location 871.893/74.5667°Lat -80.6333°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)
Lancaster Basin location map
Statistics - Beta (Crust)
Median 1.000
Mean 1.001
Scale 0.001
stdev 0.005
Z_min/Location 0.983/73.7°Lat -77.8333°Lon
Z_max/Location 1.030/74.5667°Lat -79.1333°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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TTS (crust)
Lancaster Basin location map
Statistics - TTS (crust)
Median 0.000
Mean 0.007
Scale 0.007
stdev 0.041
Z_min/Location -0.138/73.7°Lat -77.8333°Lon
Z_max/Location 0.226/74.5667°Lat -79.1333°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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Differential Beta
Lancaster Basin location map
Statistics - Differential Beta
Median 0.051
Mean 0.049
Scale 0.046
stdev 0.039
Z_min/Location -0.026/74.1333°Lat -83.8333°Lon
Z_max/Location 0.118/73.8°Lat -79.1°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 02:36:51 CEST | © Christian Heine, School of Geosciences, Sydney University, Australia