Pliocene uplift of the eastern Iberian margin: Inferences from quantitative modelling of the Valencia Trough

Details Pliocene uplift of the eastern Iberian margin: Inferences from quantitative modelling of the Valencia Trough Pliocene uplift of the eastern Iberian margin: Inferences from quantitative modelling of the Valencia Trough

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993e%26psl.119..585j&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 119, no. 4, p. 585-597

Mathematics

Logic

33

Earth Mantle, Gravity Anomalies, Models, Subsidence, Thickness, Topography, Troughs, Elastic Properties, Geological Faults, Lithosphere, Seismology, Spain

Scientific paper

We present the results of quantitative modeling of subsidence in the Valencia Trough and associated uplift in the Catalan Coastal Ranges and the Balearic Islands. Basement subsidence, Moho depth and gravity anomalies are calculated for different effective elastic thicknesses (eet) and durations of rifting, along two profiles constrained by recently collected multichannel seismic and gavity data. The tectonic evolution of the Catalan Coastal Ranges cannot be explained with traditional two-layer lithospheric stretching models for the Valencia Trough, but is consistent with a thermomechanical model invoking lithospheric necking, combined with a late-stage uplift event. The modeling of the topography of the Balearic Islands suggests an interaction of extension in the Valencia trough with extension in the South Baleric Basin. Our study reports a rifting model with low values for the flexural rigidity, an intermediate level of necking and one finite duration stretching event propagating from the northeast towards the southwestern part of the Valencia Trough. The modeling provides constraints on the magnitude of a large-scale Pliocene uplift of the eastern margin of the Iberian Peninsula.

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