Zeolite mineralization occurrs in central, in central 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. Mineral-chemical features of zeolites were studied. The deposit of Allai display vertical zoning characterized by an increase in Cl and a decrease in Mo contents, from the top to the bottom of the series, and local occurrences of minor analcime.
Zeolite mineralization in the pyroclastic flow deposit from Allai Unit (Central Sardinia, Italy).
PALOMBA M;
1999
Abstract
Zeolite mineralization occurrs in central, in central 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. Mineral-chemical features of zeolites were studied. The deposit of Allai display vertical zoning characterized by an increase in Cl and a decrease in Mo contents, from the top to the bottom of the series, and local occurrences of minor analcime.File in questo prodotto:
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