Carbon dioxide Earth degassing and seismogenesis in central and southern Italy

Details Carbon dioxide Earth degassing and seismogenesis in central and southern Italy Carbon dioxide Earth degassing and seismogenesis in central and southern Italy

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3107615c&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 7, CiteID L07615

Physics

39

Geochemistry: General Or Miscellaneous, Geochemistry: Geochemical Cycles (0330), Geochemistry: Isotopic Composition/Chemistry, Seismology: General Or Miscellaneous, Tectonophysics: Dynamics Of Lithosphere And Mantle-General

Scientific paper

We present the first regional map of CO2 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 CO2 (10% of the estimated global CO2 emitted from subaerial volcanoes) is released by two large areas located in western Italy. The anomalous flux of CO2 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 CO2 overpressurized reservoirs which induce seismicity.

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