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Results of gas flux records in the seismically active area of Val d'Agri (Southern Italy)
oleh: V. Lapenna, G. Martinelli, U. Koch, J. Heinicke, G. Colangelo, L. Telesca
| Format: | Article |
|---|---|
| Diterbitkan: | Istituto Nazionale di Geofisica e Vulcanologia (INGV) 2005-06-01 |
Deskripsi
The Val d Agri area is well-known for oil exploration. An old 500 m deep exploration well in the northern part of this area has been used for long-term hydrogeochemical investigations. The well is characterized by a discharge of about 500 L/min of thermal water (27.8°C) and a simultaneous methane gas emission of about 200 L/min. Gas analyses gave evidence that the methane come from a multiple deep reservoir. Continuous records of gas emission showed some anomalous variations occurred during the past three years. The gas flux anomalies were in a distinctive coincidence with self-potential anomalies of one station close to the hydrogeochemical station. The present paper describes the interpretation of these anomalies in relation to the geodynamic activity in the area.