Structural map of Variscan north Sardinia

The Variscan section exposed across north Sardinia consists of
migmatitic complexes intruded by the huge Corsica-Sardinia Batholith (CSB).
This latter represents one of the largest magmatic provinces
assembled in Late Variscan times, between about 340 and 280 Ma. The
composition of most plutons ranges from monzogranitic to granodioritic,
with subordinate gabbro-dioritic terms and leucocratic, muscovite ±
cordierite ± garnet-bearing, peraluminous granites. The compositional
homogeneity of plutons often makes geological mapping a difficult task,
unless large geochemical, geochronological and isotopic datasets are
available. In this work we present a new structural map of northern
Sardinia. The results are based on detailed field-structural survey, U-Pb
zircon dating and extensive, in situ, geochemical characterization with a
portable gamma ray spectrometer.