Thermal structure of the shallow upper mantle beneath Italy and neighbouring areas:Correlation with magmatic activity and geodynamic significance

摘要

Using an advanced seismic velocity–temperature conversion technique, we infer the temperature and melt distribution in the uppermantle (down to 300 km) beneath Italy and surroundings, starting from absolute S-wave velocity models. The presence of melt, indicated by the seismic reconstruction of the mantle structure in the Tyrrhenian Sea area, requires an extension of the standard conversion procedure to allow for a correction of seismic velocities for the effect of hydrous melt occurrence.