Temperature and pressure gas geoindicators at the Solfatara fumaroles (Campi Flegrei)

摘要: Long time series of fluid pressure and temperature within a hydrothermal system feeding the Solfatara fumaroles are investigated here, on basis chemical equilibria CO2–H2O–H2–CO gas system. The Pisciarelli fumarole external to crater shows an annual cycle CO contents that indicates occurrence shallow secondary processes mask deep signals. In contrast, Bocca Grande Nova located inside do not show evidence processes, their compositional variations linked temperature–pressure changes agreement between geochemical signals ground movements area (bradyseismic phenomena) suggests direct relationship pressurization process uplift. Since 2007, geoindicators have indicated system, which is most probably caused by arrival gases with high CO2 in parts This causes critical conditions as highlighted increase temperature, opening new vents, localized seismic activity. If continues time, it possible rule out phreatic explosions.