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http://hdl.handle.net/2122/9693
Authors: | Rizzo, A. L.* Federico, C.* Inguaggiato, S.* Sollami, A.* Tantillo, M.* Vita, F.* Bellomo, S.* Longo, M.* Grassa, F.* Liuzzo, M.* |
Title: | The 2014 effusive eruption at Stromboli volcano (Italy): Inferences from soil CO2 flux and 3He/4He ratio in thermal waters | Journal: | Geophysical Research Letters | Series/Report no.: | /42 (2015) | Publisher: | American Geophysical Union | Issue Date: | 12-Apr-2015 | DOI: | 10.1002/2014GL062955 | Keywords: | Stromboli eruption soil CO2 flux 3He/4He ratio thermal waters |
Subject Classification: | 04. Solid Earth::04.08. Volcanology::04.08.01. Gases 04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring |
Abstract: | A new eruption started at Stromboli on August 6, 2014, which had been preceded by 2 months of increased Strombolian activity and several lava overflows from the craters. The eruption was characterized by a lava effusion in Sciara del Fuoco from a fracture at 650 m a.s.l. that lasted until November 13–17. Here we present the first geochemical observations of this eruption, based on the soil CO2 flux in the summit area, and on 3He/4He ratios in the thermal waters near Stromboli village. We infer that this eruption was triggered by the gradual replenishment of the feeding system by a CO2- and 3He-rich magma at the end of 2013 and after June 2014, suggested by the increase in 3He/4He ratio before eruption, which reached its highest value since 2007. We thus infer that this eruption was unusual and we finally speculate on the evolutionary scenario of post eruption. |
Appears in Collections: | Article published / in press |
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