Abstract
Microprobe analyses of pyroxene phenocrysts occurring in two tephritic leucitites, two leucite phonolites and one trachyte from Vulsini are reported. Three compositionally distinct types of pyroxene occur in the tephritic leucitites: (a) salite, forming resorbed cores in pyroxene phenocrysts; (b) diopside, forming euhedral-anhedral cores in pyroxene phenocrysts: and (c) pyroxene
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