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Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1282 (in or before)||Unknown||Confirmed||3||Historical Observations||Lago Vecchienna|
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.
Bellani S, Brogi A, Lazzarotto A, Liotta D, Ranalli G, 2004. Heat flow, deep temperatures and extensional structures in the Larderello geothermal field (Italy): constraints on geothermal fluid flow. J Volc Geotherm Res, 132: 15-29.
Boyce A J, Fulignati P, Sbrana A, 2003. Deep hydrothermal circulation in a granite intrusion beneath Larderello geothermal area (Italy): constraints from mineralogy, fluid inclusions and stable isotopes. J Volc Geotherm Res, 126: 243-262.
Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.
Keller W D, 1946. The natural steam at Larderello, Italy. J Geol, 54: 327-334.
Krafft M, 1974. Guide des Volcans d'Europe. Neuchatel: Delachaux & Niestle, 412 p.
Marinelli G, 1969. Some geological data on the geothermal areas of Tuscany. Bull Volc, 33: 319-333.
Petrucci E, Sheppard S M F, Turi B, 1993. Water/rock interaction in the Larderello geothermal field (southern Tuscany, Italy): an 18O/16O and D/H isotope study. J Volc Geotherm Res, 59: 145-160.
Ruggieri G, Gianelli G, 1999. Multi-stage fluid circulation in a hydraulic fracture breccia of the Larderello geothermal field (Italy). J Volc Geotherm Res, 90: 241-261.
Villa I M, Riggieri G, Puxeddu M, Bertini G, 2006. Geochronology and isotope transport systematics in a subsurface granite from the Larderello-Travale geothermal system (Italy). J Volc Geotherm Res, 152: 20-50.
Larderello, one of the world's most productive geothermal areas, is located in the southern part of the Tuscany region of Italy. This extensive solfatara field lies in an area underlain by sediments of Eocene-to-Pliocene age. The geothermal activity is considered to be related to a cooling granitic pluton of Pliocene age beneath sedimentary and metamorphic rocks ranging from Paleozoic to Tertiary age, although the area is cut by faults with hydrothermal mineralization related to Pliocene-to-Quaternary Tuscan magmatism. The only surficial morphological manifestation of volcanism is a series of about a dozen explosion craters 30-250 m in diameter. The Lago Vecchienna crater, now filled by a 250-m-wide lake, ejected blocks and ash during a phreatic eruption in about 1282 AD (Marinelli, 1969).