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Title: Helium isotopes and tectonics in southern Italy

Abstract

Geodynamic 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. The authors report here the {sup 3}H/{sup 4}He ratios of terrestrial gas samples from southern Italy. The observed {sup 3}He/{sup 4}He 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.

Authors:
;  [1];  [2];
  1. Univ. of Tokyo (Japan)
  2. Univ. of Palermo (Italy)
Publication Date:
OSTI Identifier:
5542213
Resource Type:
Journal Article
Journal Name:
Geophysical Research Letters (American Geophysical Union); (USA)
Additional Journal Information:
Journal Volume: 16:6; Journal ID: ISSN 0094-8276
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; GEOLOGIC FORMATIONS; TECTONICS; ITALY; COMPRESSION; DEFORMATION; GEOLOGIC HISTORY; GEOLOGIC MODELS; GEOLOGIC STRUCTURES; GEOPHYSICS; HELIUM 3; HELIUM 4; ISOTOPE RATIO; SICILY; SUBDUCTION ZONES; VOLCANIC REGIONS; DEVELOPED COUNTRIES; EUROPE; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HELIUM ISOTOPES; ISOTOPES; LIGHT NUCLEI; NUCLEI; STABLE ISOTOPES; 580000* - Geosciences

Citation Formats

Sano, Yuji, Wakita, Hiroshi, Nuccio, M P, and Italiano, F. Helium isotopes and tectonics in southern Italy. United States: N. p., 1989. Web. doi:10.1029/GL016i006p00511.
Sano, Yuji, Wakita, Hiroshi, Nuccio, M P, & Italiano, F. Helium isotopes and tectonics in southern Italy. United States. https://doi.org/10.1029/GL016i006p00511
Sano, Yuji, Wakita, Hiroshi, Nuccio, M P, and Italiano, F. 1989. "Helium isotopes and tectonics in southern Italy". United States. https://doi.org/10.1029/GL016i006p00511.
@article{osti_5542213,
title = {Helium isotopes and tectonics in southern Italy},
author = {Sano, Yuji and Wakita, Hiroshi and Nuccio, M P and Italiano, F},
abstractNote = {Geodynamic 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. The authors report here the {sup 3}H/{sup 4}He ratios of terrestrial gas samples from southern Italy. The observed {sup 3}He/{sup 4}He 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.},
doi = {10.1029/GL016i006p00511},
url = {https://www.osti.gov/biblio/5542213}, journal = {Geophysical Research Letters (American Geophysical Union); (USA)},
issn = {0094-8276},
number = ,
volume = 16:6,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 1989},
month = {Thu Jun 01 00:00:00 EDT 1989}
}