Rheological thickness and strength of the Indian continental lithosphere |
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| Authors: | A Manglik R N Singh |
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| Institution: | (1) National Geophysical Research Institute, 500007 Hyderabad, India |
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| Abstract: | The estimates of rheological thickness and total lithospheric strength for the Indian continental lithosphere have been obtained
based on the representative rheological properties of upper crust, lower crust and upper mantle, and some of the available
heat flow and heat generation data. The rheological thickness, computed at different locations in the Indian shield, shows
lateral variation ranging from 79km in the southern part to 65 km in the northern part for a strain rate of 10-14 s-1. The total strength of the continental lithosphere is of the order of 1013 Nm-1 for the same value of strain rate and decreases northward. The computations carried out for a range of strain rates show
an increase in the rheological thickness and strength of the lithosphere with increasing strain rate. These results would
be important in understanding the flexural response of the Indian continental lithosphere to surface and subsurface loading,
and response to tectonic forces acting on it. |
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| Keywords: | Strength rheology continental lithosphere brittle ductile |
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