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| Content Provider | Springer Nature Link |
|---|---|
| Author | KUMAR, R T RATHEESH MAJI, TANMAY K KANDPAL, SURESH CH NAIR, RAJESH R |
| Copyright Year | 2011 |
| Abstract | Global estimates of the elastic thickness (Te) of the structure of passive continental margins show wide and varying results owing to the use of different methodologies. Earlier estimates of the elastic thickness of the North Atlantic passive continental margins that used flexural modelling yielded a Te value of ~20–100 km. Here, we compare these estimates with the Te value obtained using orthonormalized Hermite multitaper recovered isostatic coherence functions. We discuss how Te is correlated with heat flow distribution and depth of necking. The E–W segment in the southern study region comprising Nova Scotia and the Southern Grand Banks show low Te values, while the zones comprising the NE–SW zones, viz., Western Greenland, Labrador, Orphan Basin and the Northern Grand Bank show comparatively high Te values. As expected, Te broadly reflects the depth of the 200–400°C isotherm below the weak surface sediment layer at the time of loading, and at the margins most of the loading occurred during rifting. We infer that these low Te measurements indicate Te frozen into the lithosphere. This could be due to the passive nature of the margin when the loads were emplaced during the continental break-up process at high temperature gradients. |
| Starting Page | 447 |
| Ending Page | 458 |
| Page Count | 12 |
| File Format | |
| ISSN | 02534126 |
| Journal | Journal of Earth System Science |
| Volume Number | 120 |
| Issue Number | 3 |
| e-ISSN | 0973774X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2011-07-07 |
| Publisher Institution | Indian Academy of Sciences |
| Publisher Place | India |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Elastic thickness gravity coherence North Atlantic passive continental margins Extraterrestrial Physics, Space Sciences Earth Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | 1900/1901 |
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