Statistical characteristic of porosity in lavas of Tolbachik fissure eruption, Kamchatka

At present, works, devoted to modern volcanism, hardly affect such a property of volcanic lavas as bubbling. In this article the first results of the study of the bubbling properties of the products of the Tolbachik Fissure Eruption 2012-2013 are given. Planometric methods for analyzing rocks from their images were used and statistical calculations were made. As a result, five types of lavas were identified - from the least porous - dense to the most porous scoria. The type of lava is porous-vesicular with a cumulative volume of cavities of 30-55 %. With increasing porosity-vesicularity, the size of the voids and the degree of their elongation are directly correlated.