Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2724
Authors: | D'Alessandro, W.* Brusca, L.* Kyriakopoulos, K.* Margaritopoulos, M.* Michas, G.* Papadakis, G.* |
Title: | Fluid geochemistry investigations on the volcanic system of methana | Journal: | Bulletin of the Geological Society of Greece | Series/Report no.: | /40 (2007) | Publisher: | Geological Society of Greece | Issue Date: | May-2007 | Keywords: | soil gases CO2 fluxes gas hazard groundwater chemistry |
Subject Classification: | 03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases 03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems 03. Hydrosphere::03.04. Chemical and biological::03.04.07. Radioactivity and isotopes 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 04. Solid Earth::04.08. Volcanology::04.08.01. Gases 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk |
Abstract: | An extensive geochemical survey on the fluids released by the volcanic/geothermal system of Methana was undertaken. Characterization of the gases was made on the basis of the chemical and isotopic (He and C) analysis of 14 samples. CO2 soil gas concentration and fluxes were measured on the whole peninsula at more than 100 sampling sites. 31 samples of thermal and cold groundwaters were also sampled and analysed to characterize the geochemistry of aquifers. Anomalies referable to the geothermal system, besides at known thermal manifesta-tions, were also recognized at some anomalous degassing soil site and in some cold groundwater. These anomalies were always spatially correlated to the main active tectonic system of the area. The total CO2 output of the volcanic system has been preliminary estimated in about 0.2 kg s-1. Although this value is low compared to other volcanic systems, anomalous CO2 degassing at Methana may pose gas hazard problems. Such volcanic risk, although restricted to limited areas, cannot be neglected and further studies have to be undertaken for its better assessment |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
D'Alessandro_et_al.PDF | main article | 558.04 kB | Adobe PDF | View/Open |
Page view(s) 50
215
checked on Apr 20, 2024
Download(s) 50
208
checked on Apr 20, 2024