The pre-Neogene subcontinental lithosphere beneath the Carpathian-Pannonian region is poorly studied and the mantle
beneath the Tisza Unit (S Hungary) is known only from the rare occurrence of mantle xenoliths in Late Cretaceous lamprophyre
dykes in the Villány Mts. This paper presents clinopyroxene and spinel single-crystal X-ray diffraction studies from spinel lherzolite
xenoliths from this locality. Clinopyroxene unit cell volumes are signifi cantly high (up to 437 Å3) and show fi nal equilibrium
pressures near to the plagioclase stability fi eld. Unit cell parameters of the spinel crystals range from 8.1479 to 8.1541 Å, and are
directly related with their low cr#. Oxygen atomic coordinates u are equal to 0.2628 and suggest slow cooling of the samples related
to the subvolcanic character of the host rock. Crystal structure and thermobarometrical data of the xenoliths, together with a detailed
petrographical study, indicate recrystallization and re-equilibration of the sampled mantle section under low PT conditions.
