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dc.contributor.authorallSano, Y.; Laboratory for Earthquake Chemistry, Faculty of Science, University of Tokyo, Japan-
dc.contributor.authorallWakita, H.; Laboratory for Earthquake Chemistry, Faculty of Science, University of Tokyo, Japan-
dc.contributor.authorallNuccio, P. M.; Univ. Palermo-
dc.contributor.authorallItaliano, F.; Instituto di Geochimica dei Fluidi-
dc.description.abstractGeodynamic evolution of southern Italy can be understood within the framework of the Mediterranean- Alpine System. Subduction of a plate along the Sicily- Calabrian forearc under the Tyrrhenian Sea has been suggested by many geophysicists, although it is not yet confirmed and remains somewhat controversial. Helium isotope ratios provide useful information on the geotectonic structure of the region. We report here the 3He/4He ratios of terrestrial gas samples from southern Italy. The observed 3He/4He ratios are relatively high in the Eolian volcanic arc region and low in the other areas. Dichotomous explanations are presented. Firstly volcanic arc-forearc hypothesis suggests the subduction along the Sicily-Calabrian forearc. Secondly horizontal transport hypothesis is described based on the relationship between the ratios and radial distance from the recent spreading basin in Southern Tyrrhenian Sea.en
dc.relation.ispartofGeophysical Research Lettersen
dc.relation.ispartofseries6/16 (1989)en
dc.subjecthelium isotopesen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistryen
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dc.description.obiettivoSpecifico3.2. Tettonica attivaen
dc.description.journalTypeJCR Journalen
dc.contributor.authorSano, Y.-
dc.contributor.authorWakita, H.-
dc.contributor.authorNuccio, P. M.-
dc.contributor.authorItaliano, F.-
dc.contributor.departmentLaboratory for Earthquake Chemistry, Faculty of Science, University of Tokyo, Japan-
dc.contributor.departmentLaboratory for Earthquake Chemistry, Faculty of Science, University of Tokyo, Japan-
dc.contributor.departmentUniv. Palermo-
dc.contributor.departmentInstituto di Geochimica dei Fluidi-
item.fulltextWith Fulltext-
item.languageiso639-1en- for Earthquake Chemistry, Faculty of Science, University of Tokyo, Japan- for Earthquake Chemistry, Faculty of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan- Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia- Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia- Nazionale di Geofisica e Vulcanologia- Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
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