Isotope And Chemical Studies For A Geothermal Assessment Of The Island Of Nisyros (Greece)

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Journal Article: Isotope And Chemical Studies For A Geothermal Assessment Of The Island Of Nisyros (Greece)

Abstract
Two distinct hydrothermal aquifers occur beneath the volcanic crater The deeper one is characterised by temperatures above 330°C and a chemical and isotopic composition in agreement with a thermal modification of seawater by water/rock interaction and boiling processes at depth The shallow aquifer has temperatures below 170°C and salt content and isotopic composition between those of seawater and local groundwaters The steam produced at the caldera rim (Kaminakia group) has a ΔD and Δ18O of -42‰ and -61‰ respectively whereas the steam produced inside the caldera (Stephanos and Polybotes group) exhibits average Δ values of -11‰ and +25‰ for D and 18O respectively Such values are indicative of different parent waters for the above two aquifers The isotope geothermometers based on the pairs (CH4-H2) (H2O-H2) and (CH4-CO2) from the same fumaroles yield values consistently within the 100-350°C range.

Authors 
Teodoro Kavouridis, Dimitri Kuris, Costantino Leonis, Vera Liberopoulou, Joannis Leontiadis, Costanzo Panichi, Giorgia La Ruffa and Antonio Caprai








Published Journal 
Geothermics, 1999





DOI 
10.1016/S0375-6505(99)00005-X


 

Citation

Teodoro Kavouridis,Dimitri Kuris,Costantino Leonis,Vera Liberopoulou,Joannis Leontiadis,Costanzo Panichi,Giorgia La Ruffa,Antonio Caprai. 1999. Isotope And Chemical Studies For A Geothermal Assessment Of The Island Of Nisyros (Greece). Geothermics. (!) .