ИСТИНА

As it`s well known relict permafrost, which are in the Arctic offshore, experience to thawing and salting processes. In this case contained gas hydrate formation can be destroyed and caused active methane emissions to the atmosphere. In the framework of this project to study the mechanisms and patterns of dissociation of gas hydrates in permafrost caused by the migration of salts a methodology of experimental simulation of the interaction between saline solutions and frozen sediments containing gas hydrate formations has been developed. It includes the preparation of frozen methane hydrate saturated samples, experimentation on the interaction between saline and frozen hydrate sediments and calculation of parameters and characteristics describing the mass transfer processes under interaction between saline and frozen hydrate sediments. Sand and sandy loam samples were used as the object of the study. It's were taken from the Laptev Sea shelf permafrost. The experimental study allowed us to estimate the speed of the thawing front caused by the migration of salts in the frozen hydrate contained sediments, and to get some laws on the dissociation of the pore hydrates in permafrost under interaction with saline solutions. During the studies the estimate of methane emissions from the decomposition of pore gas hydrates in frozen sediments has been received.