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Carbon dioxide Earth degassing and seismogenesis in central and southern Italy

2004; American Geophysical Union; Volume: 31; Issue: 7 Linguagem: Inglês

10.1029/2004gl019480

1944-8007

Giovanni Chiodini, Carlo Cardellini, Alessandro Amato, E. Boschi, Stefano Caliro, Francesco Frondini, Guido Ventura,

CO2 Sequestration and Geologic Interactions

We present the first regional map of CO 2 Earth degassing from a large area (most of central and south Italy) derived from the carbon of deep provenance dissolved in the main springs of the region. The investigation shows that a globally significant amount of deeply derived CO 2 (10% of the estimated global CO 2 emitted from subaerial volcanoes) is released by two large areas located in western Italy. The anomalous flux of CO 2 suddenly disappears in the Apennine in correspondence to a narrow band where most of seismicity concentrates. Here, at depth, the gas accumulates in crustal traps generating CO 2 overpressurized reservoirs which induce seismicity.