C - Western Elba

Miocene to Quaternary magmatic rocks, found along the Tyrrhenian border of peninsular Italy, mostly belong to potassic and ultrapotassic suites. They can be divided into three different petrographic provinces, where magmatism is confined in terms of space, time and petrographic characteristics. The Tuscan Magmatic Province is the northernmost province, in which mantle-derived potassic and ultrapotassic, leucite-free volcanic rocks occur prevailing over high potassium calc-alkaline rocks, covering a time span of activity between 14.2 and 0.19 Ma. These rocks are silica-saturated to silica-oversaturated and range from high-potassium calc-alkaline to ultrapotassic lamproite, through potassic and ultrapotassic shoshonitic series. The Roman Magmatic Province extends from Northern Latium to the Umbrian and Campanian areas, arranged in a volcanic belt along the Tyrrhenian border of the Apennine chain. It is made up of rare shoshonitic rocks (KS) and leucite-bearing rocks (HKS). Some HKS ma...