Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7257
AuthorsNeri, M.* 
Giammanco, S.* 
Ferrera, E.* 
Patanè, G.* 
Zanon, V.* 
TitleSpatial distribution of soil radon as a tool to recognize active faulting on an active volcano: the example of Mt. Etna (Italy)
Issue Date25-Jun-2011
Series/Report no./102 (2011)
DOI10.1016/j.jenvrad.2011.05.002
URIhttp://hdl.handle.net/2122/7257
Keywordsradon
fault
seismic hazard
Etna
Subject Classification03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases 
03. Hydrosphere::03.04. Chemical and biological::03.04.07. Radioactivity and isotopes 
03. Hydrosphere::03.04. Chemical and biological::03.04.08. Instruments and techniques 
04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous 
04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous 
04. Solid Earth::04.04. Geology::04.04.09. Structural geology 
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous 
04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous 
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous 
05. General::05.08. Risk::05.08.99. General or miscellaneous 
AbstractThis study concerns measurements of radon and thoron emissions from soil carried out in 2004 on the eastern flank of Mt. Etna, in a zone characterized by the presence of numerous seismogenic and aseismic faults. The statistical treatment of the geochemical data allowed recognizing anomaly thresholds for both parameters and producing distribution maps that highlighted a significant spatial correlation between soil gas anomalies and tectonic lineaments. The seismic activity occurring in and around the study area during 2004 was analyzed, producing maps of hypocentral depth and released seismic energy. Both radon and thoron anomalies were located in areas affected by relatively deep (5e10 km depth) seismic activity, while less evident correlation was found between soil gas anomalies and the released seismic energy. This study confirms that mapping the distribution of radon and thoron in soil gas can reveal hidden faults buried by recent soil cover or faults that are not clearly visible at the surface. The correlation between soil gas data and earthquakes depth and intensity can give some hints on the source of gas and/or on fault dynamics.
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