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Volcanism of the southern Tyrrhenian Sea and its geodynamic implications

1973; American Geophysical Union; Volume: 78; Issue: 23 Linguagem: Inglês

10.1029/jb078i023p05221

2156-2202

F. Barberi, Paolo Gasparini, F. Innocenti, L. Villari,

Geological and Geochemical Analysis

Journal of Geophysical Research (1896-1977)Volume 78, Issue 23 p. 5221-5232 Volcanism of the southern Tyrrhenian Sea and its geodynamic implications F. Barberi, F. BarberiSearch for more papers by this authorP. Gasparini, P. GaspariniSearch for more papers by this authorF. Innocenti, F. InnocentiSearch for more papers by this authorL. Villari, L. VillariSearch for more papers by this author F. Barberi, F. BarberiSearch for more papers by this authorP. Gasparini, P. GaspariniSearch for more papers by this authorF. Innocenti, F. InnocentiSearch for more papers by this authorL. Villari, L. VillariSearch for more papers by this author First published: 10 August 1973 https://doi.org/10.1029/JB078i023p05221Citations: 218AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract The petrochemical characteristics of volcanoes of the southern Tyrrhenian Sea point to the contemporaneous existence of a calc-alkaline compressive volcanism (Eolian Islands) and basaltic distensive volcanism (the abyssal plain, eastern Sicily, Ustica, and the Strait of Sicily). K-h diagrams of calc-alkaline products support the existence of a 50°–60° WNW dipping inclined seismic zone. A deepening of this zone with time under the Eolian Islands is suggested by the increase of K content observed in recent volcanics. Geochemical data suggest an oceanic down-going slab. Volcanism of basaltic affinity occurs in the back arc, and its distensive character and geophysical features lead us to consider the abyssal plain as a marginal basin produced by spreading. The occurrence of basaltic volcanism in eastern Sicily and Ustica island allows us to define the extension of the oceanic slab and to locate the boundary between converging plates. References Allan, T. D., C. Morelli, A geophysical study of the Mediterranean Sea, Boll. Geofis. Teor. Appl., 13, 101– 142, 1971. Ambrosetti, P., A. Azzaroli, F. P. Bonadonna, M. Folieri, A scheme of pleistocene chronology for the Tyrrhenian side of central Italy, Boll. Soc. Geol. Ital., 91, 169– 184, 1972. Armstrong, R. L., J. A. Cooper, Lead isotopes in island arcs, Bull. Volcanol., 35, 27– 63, 1971. Barberi, F., S. Borsi, G. Ferrara, F. 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