EXPLOSIVE DEGASSING OF THE EARTH IN THE NORTH OF WESTERN SIBERIA: LAND AND COASTAL PARTS OF THE KARA SEA

It has been substantiated that remote sensing (RS) data gives possibility for successful study of hazardous objects of explosive degassing of the Earth. As a result of comprehensive RS studies, 7,783 explosive degassing zones have been discovered in the northern part of Western Siberia, including 6,300 at the bottom of 4,736 thermokarst lakes, 139 at the bottom of 29 rivers, and 1,344 in shallow water areas of the Kara Sea. The largest Neyto-Seyakha degassing area coincides with the central part of the Yamal graben rift, and the Sabetta area is confined to the South Tambeyskoye field. Intensive degassing zones have also been discovered in the northern part of the Mutny Bay, in the Ob and Taz Bays of the Kara Sea. Large degassing centers are apparently associated with subvertical migration of deep gas along permeable faults and/or dissociation of gas hydrates during the growth of taliks on lakes and rivers that do not freeze to the bottom.

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