How rigid is Europe's lithosphere?

Details How rigid is Europe's lithosphere? How rigid is Europe's lithosphere?

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3616303t&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 16, CiteID L16303

Physics

5

Tectonophysics: Rheology: Crust And Lithosphere (8031), Tectonophysics: Rheology: General (1236, 8032), Tectonophysics: Rheology: Mantle (8033), Tectonophysics: Lithospheric Flexure

Scientific paper

The integrated strength distribution and variations of the effective elastic plate thickness (T e ) have been estimated for the European lithosphere based on thermal and rheological data for the crust and upper mantle. The new results show a significant spatial variability demonstrating that both ‘jelly sandwich’ and ‘crème brûlée’ models might be valid depending on lithospheric physical conditions. In most of Europe crustal strength provides a relatively large contribution (˜50%) to the lithospheric strength. Western Europe appears mostly characterized by mechanically decoupled lithospheric layers, low strength and T e < 30 km. The contribution of the mechanically strong mantle to T e is low in most parts of western Europe. No clear relationship between T e and thermal age is found in the continent: the values for the tectonic provinces older than 85 Ma are significantly smaller than theoretically expected for their age and crustal thickness, whereas the opposite is true for the younger provinces.

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