Advances in mineral exploration for zeolites in Cenozoic volcanic sequences of Sardinia: the Sector of Asuni (Central Sardinia).

Mineral prospecting for zeolite occurrences was carried out in central Sardinia. In central Sardinia (Nureci-Fordongianus sector) the most intensively zeolitized flows occur in the unwelded ash- and pumice-rich pyroclastic facies of Allai-Samugheo, where the highest concentrations in zeolite-group minerals have been recognized, and in the Asuni units. The Asuni unit the deposit displays vertical zoning where Cl content increases and Mo decreases, from the top to the bottom of the series. Locally, minor amount of analcime occurs.