Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere

Details Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3414303e&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 14, CiteID L14303

Other

9

Geochemistry: Stable Isotope Geochemistry (0454, 4870), Geochemistry: Fluid And Melt Inclusion Geochemistry, Geochemistry: Organic And Biogenic Geochemistry, Global Change: Land/Atmosphere Interactions (1218, 1843, 3322), Volcanology: Mud Volcanism

Scientific paper

Molecular composition, CH4 isotopes and gas flux of all main terrestrial mud volcanoes and other methane seeps in Italy are being assessed for the first time. Whereas 74% of the Italian gas reservoirs are biogenic, about 80% of the seeps release thermogenic gas. Dry-seep gas generally maintains the reservoir C1/(C2 + C3) ``Bernard'' ratio while mud volcanoes show molecular fractionation likely occurring during advective migration. Accordingly, a simple and direct use of the ``Bernard'' parameter might be misleading when applied to mud volcanoes as it could not always reflect the reservoir composition. Methane flux into the atmosphere from macro-seep areas is in the order of 102-106 t km-2y-1. Microseepage is widespread throughout large areas and, on a regional scale, it provides the main methane output. A first emission estimate for the total hydrocarbon-prone area of Italy suggests levels of 105 t y-1, comparable to national sources from fossil fuel industry.

Affiliated with

Also associated with

No associations

Rating

Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methane seeps and mud volcanoes in Italy: Gas origin, fractionation and emission to the atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-779968