A thermo-rheological analysis is performed to elucidate the mechanical behaviour of the lithosphere in the Mediterranean domain. The thermal field of the lithosphere is calculated by means of a finite element 3D thermal model. The decrease in radiogenic heat production with depth is taken into account, together with the compositional layering of the lithosphere. The predicted thermal field is analysed in terms of the temperatures and depth of the thermal lithosphere base. Based on the predicted thermal field, a rheological analysis is conducted, accounting for both the brittle and ductile behaviour of each lithospheric layer. The effects of the choice of wet and dry rheology are also investigated. Our rheological analysis reveals a strongly heterogeneous lithosphere strength pattern in the Central Mediterranean, characterised by strong lateral strength gradients and the occurrence of non-competent crustal layers of significant thickness in the eastern portion of the study area.

Crust-mantle mechanical structure in the Central Mediterranean region / R. Splendore, A.M. Marotta. - In: TECTONOPHYSICS. - ISSN 0040-1951. - 603(2013), pp. 89-103. [Epub ahead of print] [10.1016/j.tecto.2013.05.017]

Crust-mantle mechanical structure in the Central Mediterranean region

R. Splendore
Primo
;
A.M. Marotta
Ultimo
2013

Abstract

A thermo-rheological analysis is performed to elucidate the mechanical behaviour of the lithosphere in the Mediterranean domain. The thermal field of the lithosphere is calculated by means of a finite element 3D thermal model. The decrease in radiogenic heat production with depth is taken into account, together with the compositional layering of the lithosphere. The predicted thermal field is analysed in terms of the temperatures and depth of the thermal lithosphere base. Based on the predicted thermal field, a rheological analysis is conducted, accounting for both the brittle and ductile behaviour of each lithospheric layer. The effects of the choice of wet and dry rheology are also investigated. Our rheological analysis reveals a strongly heterogeneous lithosphere strength pattern in the Central Mediterranean, characterised by strong lateral strength gradients and the occurrence of non-competent crustal layers of significant thickness in the eastern portion of the study area.
Central Mediterranean; Lithosphere strength heterogeneities; Lithosphere thermal field; Rheological analysis
Settore GEO/10 - Geofisica della Terra Solida
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/223253
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