Methane distribution in the Japan and Okhosk seas: proposal for gasgeochemical study on East sea of Viet Nam

Abstract

Experience for the last 30 years explorations (e.x. KOMEX; CHAOS; SSGH and other projects) in the Japan and Okhotsk Sea regions revealed that natural gases can be direct signs of the deep structures in the marginal seas. Deep faults, tectonic troughs, oil-gas deposits, hot spots, accretion prisms, sources of gas hydrates and mud volcanoes has a number of natural gas features. Helium, hydrogen, methane, hydrocarbon gases, nitrogen, carbon dioxide, sulphur dioxide, stable isotopes of gas compounds, relations of gases can tell us about certain information of deep structures and minerals. Permeability zones also provide the greenhouse gases fluxes (methane-carbon dioxide) from interior into the atmosphere. This article presents also an activity of “Joint Vietnam- Russia Laboratory for marine geosciences and technology” (IMGG VAST – POI FEB RAS).