Tectonic Evolution of the Central Mediterranean

The Central Mediterranean represents a dynamic juncture where the African plate converges with Eurasia, incorporating the Adria microplate and giving rise to the Apennine and Calabrian arcs. Since the Neogene, subduction of the Ionian lithosphere beneath Calabria and the roll-back of the Adriatic slab have driven back-arc extension, leading to the opening of the Tyrrhenian Sea and the development of asymmetric back-arc basins. This process has been punctuated by alternating phases of crustal shortening, slab rollback and trench retreat, which control magmatic activity along volcanic chains such as the Vavilov, Marsili and Palinuro ridges. Seismic imaging has revealed pronounced low-velocity zones in the upper mantle, marking regions of asthenospheric upwelling. Simultaneously, gravitational collapse structures on the Ionian margin and episodic tectonic inversion along inherited faults capture the interplay between extension, uplift and mass wasting. Understanding these mechanisms is critical for assessing seismic and volcanic hazards, exploring geothermal resources and reconstructing palaeogeographic evolution across the basin.

Research from Nature Portfolio

Recent studies have revealed the existence of a large gravitational complex off southern Italy, whose headwall and basal detachment formed between Messinian evaporites and Tortonian shales. Seismic and borehole data indicate initiation around 4 Ma, with surface movement correlating to discrete contractional events in the Calabrian region and ongoing slip at reduced rates into the present day. Complementing this, a three-dimensional shear-wave velocity model beneath the Tyrrhenian basin has mapped a broad low-velocity mantle zone at depths of 40–80 km. This structure aligns with geological reconstructions of back-arc spreading and supports a geodynamic regime dominated by slab rollback and Africa-Eurasia convergence, refining our view of crust-mantle interactions and arc migration.

Tectonic Evolution of the Central Mediterranean publication trend

The graph below shows the total number of articles in tectonic evolution of the central mediterranean across all publications each year (not limited to Nature Index journals).

Technical terms

Subduction: The process by which one tectonic plate descends beneath another into the mantle.

Back-arc basin: A region of crustal extension and seafloor spreading that forms landward of a volcanic arc at a subduction zone.

Slab rollback: The backward motion of a subducting plate’s hinge, driving trench retreat and back-arc extension.

Gravitational complex: A large-scale collapse feature in which sedimentary or volcanic masses slide downslope under gravity.

Shear-wave velocity model: A three-dimensional map of seismic shear-wave speeds used to infer variations in lithospheric composition and temperature.

Moho discontinuity: The boundary between crust and mantle marked by a distinct increase in seismic velocity.

References

1. Imaging the Plumbing System of the Asymmetric Vavilov Spreading Ridge (Tyrrhenian Sea Back‐Arc Basin) From Combined Bathymetry and Magnetic Data. Geophysical Research Letters (2023).
2. A new large-scale gravitational complex discovered in the Gulf of Squillace (central Mediterranean): tectonic implications. Scientific Reports (2023).
3. 3D shear wave velocity model of the crust and uppermost mantle beneath the Tyrrhenian basin and margins. Scientific Reports (2019).
4. Inhomogeneous Magnetization of Tyrrhenian Seamounts Revealed From Gravity and Magnetic Correlation Analysis. Journal of Geophysical Research: Solid Earth (2024).