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The 2014 effusive eruption at Stromboli volcano (Italy): Inferences from soil CO 2 flux and 3 He/ 4 He ratio in thermal waters
Author(s) -
Rizzo Andrea Luca,
Federico Cinzia,
Inguaggiato Salvatore,
Sollami Aldo,
Tantillo Mariano,
Vita Fabio,
Bellomo Sergio,
Longo Manfredi,
Grassa Fausto,
Liuzzo Marco
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2014gl062955
Subject(s) - strombolian eruption , lava , effusive eruption , geology , volcano , impact crater , magma , flux (metallurgy) , seismology , lateral eruption , volcanology , geochemistry , explosive eruption , astrobiology , physics , materials science , metallurgy
A new eruption started at Stromboli on 6 August 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 above sea level that lasted until 13–17 November. Here we present the first geochemical observations of this eruption, based on the soil CO 2 flux in the summit area and on 3 He/ 4 He 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 CO 2 ‐ and 3 He‐rich magma at the end of 2013 and after June 2014, suggested by the increase in 3 He/ 4 He 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 posteruption.