Abstract. This paper focuses on the authigenic mineralization processes acting “Tufo Rosso a Scorie Nere” (TRS), i.e. one of main pyroclastic units Vico stratovolcano (Latium, Italy). The deposits appear in general massive and made “black vitreous vesiculated juvenile scoriae”, immersed an ashy matrix lithified after zeolitization processes. minerals are chabazite phillipsite, zeolitic content ...

Solubility experiments were performed on a trachyte and pantellerite from Pantelleria. The has SiO 2 =65.2 wt%, Al O 3 =15.2 wt% peralkaline index (P.I.=molar[(Na O+K O)/Al ])∼1 while the =72.2 =11 P.I.=1.3. in pressure range of 50–300 MPa at T=950°C for 50–200 T=850°C pantellerite. water content experimental glasses was determined by Karl Fischer titration, elemental analyser FT–IR spectroscop...

We present a study of the brittle tectonics Tunas Alkaline Complex focusing on kinematic and geometric analysis faults shear zones deforming complex. The data acquired respective interpretations sought to contribute post-Cretaceous tectonic structural models southern Brazil. ~83 Ma-old alkaline complex is made up syenites, alkali plutonic volcanic breccias, as well trachyte, microsyenite, bosto...

The Euganean Hills of North East Italy have long been recognised as an area characterized by a higher than average natural radiation background. This is due to two main reasons: a) primary lithogenic radiation due to rhyolitic and trachytic outcrops, which are “acidic alkaline” magmatic rocks potentially enriched in uranium and thorium; b) secondary sources related to a geothermal field – widel...