Investigations of seafloor pockmarks
intensified during the last two decades. The origin of these features
related to the periodical leakage of fluids (mainly methane) from
reservoirs. The rapidly increasing search for hydrocarbons, led oil
academia to broad investigations in the North Sea and the Norwegian Sea
revealing the presence of large pockmark fields. In 1998 I started to
with multibeam, sidescan-sonar and seismic records as well as targeted
sampling. Our results showed the ubiquitous presence of methanogenic
at most pockmark sites. In 2004 I documented the first evidence of
carbonates from the Norwegian margin and more recently (TTR16 cruise)
first time we managed to sample gas hydrates from the Nyegga region.
results provided crucial information to understand the present day
these pockmarks and gave insights to distinguish the mechanisms that
the gas seepage. Our approach combined acoustic records interpretations
petrography, geochemistry, and fluid inclusions studies. I also
collection of authigenic carbonates from numerous palaeo-seepage sites
from Barbados, Colorado, Italy,
North Sea combining
comparative diagenetic and geochemical studies. Publications: (Kenyon et al., 1999;
Kenyon et al., 2001; Mazzini et al.,
2002; Parnell et al., 2002; Mazzini et al.,
2005; Mazzini et al., 2006; Ivanov et al.,
2007; Akhmetzhanov et al., 2008).
M., Mazzini, A., Blinova, V., Kozlova, E., Laberg, J.-S., Matveeva, T.,
Taviani, M. and Kaskov, N., 2010. Seep mounds on the Southern
Vøring Plateau (offshore Norway). Marine and Petroleum Geology,
M., Blinova, V., Kozlova, E., Westbrook, G., Mazzini, A., Minshull, T.
and Nouzé, H., 2007. First sampling of gas hydrate from the
Vøring Plateau. EOS, 88(19): 209-210.
A., Svensen, H., Hovland, M. and Planke, S., 2006. Comparison and
implications from strikingly different authigenic carbonates in a
Nyegga complex pockmark, G11, Norwegian Sea. Marine Geology, 231:
A., Aloisi, G., Akhmanov, G.G., Parnell, J., Cronin, B. and Murphy, P.,
2005. Integrated petrographic and geochemical record of hydrocarbon
seepage on the Vøring Plateau. Geological Society, 162: 815-827.
Mazzini, A. and Honghan, C., 2002. Fluid inclusion studies of
chemosynthetic carbonates: strategy for seeking life on Mars.
Astrobiology, 2 (1): 43-57.
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