The intramontane San Vittorino basin hosts a mineral water spa and a large number of sinkholes which were formed by significant fluxes of acidic gases (CO2, H2S) from depth. This site is being studied within the EC-funded project NASCENT (NNE5-2000-00095), which is examining sealed and leaking CO2 reservoirs as natural analogues for deep geological sequestration of CO2. This paper addresses the use of soil gas surveys to identify areas of elevated gas concentrations caused by migration from deep sources and then the subsequent installation of an autonomous geochemical station for temporal monitoring of high-risk sites. The soil gas results outlined a zone of anomalous CO2, CH4 and He values in the north-central and extreme eastern part of the plain which can be correlated with known structural features and geophysical anomalies. The monitoring station, which measures dissolved CO2 concentrations in a water well every 3 hours, has been in place for 5 months and is yielding interesting results.
Soil gas surveys and autonomous geochemical stations for the monitoring of geologically sequestered CO2: Results from a leaking natural CO2 reservoir below the San Vittorino Plain central Italy / Lombardi, Salvatore; Ciotoli, Giancarlo; Beaubien, Stanley Eugene; Annunziatellis, Aldo; S., Nisio. - STAMPA. - (2003). (Intervento presentato al convegno 226th ACS National Meeting tenutosi a New York, USA nel September 7-11, 2003).
Soil gas surveys and autonomous geochemical stations for the monitoring of geologically sequestered CO2: Results from a leaking natural CO2 reservoir below the San Vittorino Plain central Italy
LOMBARDI, Salvatore;CIOTOLI, Giancarlo;BEAUBIEN, Stanley Eugene;ANNUNZIATELLIS, Aldo;
2003
Abstract
The intramontane San Vittorino basin hosts a mineral water spa and a large number of sinkholes which were formed by significant fluxes of acidic gases (CO2, H2S) from depth. This site is being studied within the EC-funded project NASCENT (NNE5-2000-00095), which is examining sealed and leaking CO2 reservoirs as natural analogues for deep geological sequestration of CO2. This paper addresses the use of soil gas surveys to identify areas of elevated gas concentrations caused by migration from deep sources and then the subsequent installation of an autonomous geochemical station for temporal monitoring of high-risk sites. The soil gas results outlined a zone of anomalous CO2, CH4 and He values in the north-central and extreme eastern part of the plain which can be correlated with known structural features and geophysical anomalies. The monitoring station, which measures dissolved CO2 concentrations in a water well every 3 hours, has been in place for 5 months and is yielding interesting results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
