Mount Etna and the 1971 eruption - Some experimental studies on the 1971 lavas from Etna

Abstract
During the 1971 eruption, water and air quenched samples of lava were taken along a single flow, the one from near Rifugio Citelli to Fornazzo. The results of one atmosphere melting experiments on these samples, some of which were under controlled oxygen fugacity are discussed in relation to chemical and petrographic variations along the length of the flow as well as at its source. No significant element variation was found, particularly in respect of alkalis and water (volatilization effects). The FeO/Fe2Os ratio similarly lacks any significant variation except for a slight initial oxidation effect. With a liquidus of about 1200 °C, crystallization with in the flow was well advanced, with over 50 % of crystalline phases.

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