Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8909231 | Marine and Petroleum Geology | 2018 | 14 Pages |
Abstract
The relationship existing among the measured parameters suggests that the WFS acts as a preferential pathway for active rise of deep fluids. The presence of such advective processes is suggested by the relatively high rate of migration needed to obtain anomalies of short-lived 222Rn in the soil pores. Gas molecular and isotopic composition reveals that all sampled localities have a mixed hydrocarbon origin implying the presence of shallow microbial and deeper thermogenic hydrocarbons. CO2 isotopic values (δ13C-CO2 ranges between â9.48â° and 4.12â° V-PDB) indicate the presence of mantle derived CO2 and thermo-metamorphic CO2 suggesting that elevated temperatures have a key role in this active system. The samples collected from fractured and faulted zones reveal to have gas composition similar to that obtained from Lusi crater, indicating deep origin fluids.
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Authors
A. Sciarra, A. Mazzini, S. Inguaggiato, F. Vita, M. Lupi, S. Hadi,