Kurchavov A.M., Tolmacheva E.V., Yakushev A.I. Conditions of formation and transport of melt to the earth’s surface during forming of granitoids in the Сaucasian Mineral Waters
Abstract. CMWgranitoids are represented by syenite - granosyenite – alkaline granitic association. There are two stages
in the formation of the melt that created them. Initially it was saturated with volatile, predominantly carbonic, and chlorine.
This contributed to its rapid rise to the surface of the earth and delamination with the formation of banality. Primary
ratios of Sr and Nd isotopes, abundant and diverse xenoliths, zircons containing more ancient nuclei, violations of the
Ar and Sr isotopic equilibria indicate that the melt was the result of a deep transformation of a heterogeneous starting
material, mainly of crustal origin. At the same time, the proximity of the Sr isotopic ratios in different types of granitoids,
the proximity of the composition of differently colored stripes, the identity of the content and distribution pattern of REEs
indicate a high degree of homogenesis of the melt. Its crystallization began with the separation of short-prismatic zircons,
apatite, sphene, then pyroxenes at temperatures of 1280 ° C ± 10 ° C and pressures of more than 5 kbar. The residual
melt was saturated with volatile and REE. Later, long-prismatic zircons, plagioclase, amphibole, biotite were formed at
a temperature of 1010 - 9500 C and a pressure of 5 - 3 kbar. The interaction of the melt with the rocks of the Jurassic –
Miocene evaparite strata when moving to the surface of the earth led to its enrichment by xenoliths of varying degrees
of processing and borrowing from the host rocks F, B, S, Sr, Ba. The further rise of magma to the earth's surface was
accompanied by an intense cataclase of released phenocrysts, an uneven distribution of fluid in the melt, which enriched
individual bands or streams. In the less enriched (dark-colored) strips of fluid, the phenocrysts are more intense than in
the enriched (light-colored) strips.The temperature of homogenization of RV in the sheets of plagioclase of dark-colored
strips varies from 9000 С to 8500 С, and light-colored strips - within 880 - 8200 С. The main mass of strips of different colors
consists of the same minerals (feldspars, pyroxene, amphibole, biotite, quartz, magnetite), but in the (light-colored) strips
enriched with fluid, more plagioclase and quartz are found, with which they are lighter in color. In the fluid-depleted (darkcolored)
strip, there are more dark-colored minerals, which gives it a darker color.
Miskarоva R.G., Dokukin M.D., Kalov R.Kh., Khatkutov A.V.
Investigation of avalanche activity on the basis of analysis of the different aerospace information (on the example of valley Irik river, Central Caucasus)
Abstract. The article considers avalanche activity in the Irik river valley. The results of the analysis of multi-temporal
aerospace information from 1957 to 2017 and the route survey data are presented. In certain years of the 21st
century on the facts of revealed forestland destruction, approximate dates of sporadic avalanches are determined. By
the presence of remaining avalanche snowfields, avalanche catchments with high avalanche activity are determined.
Tavasiyev R.A. Glaciers and near glaciers lakes of Gularidon basin’s river, Central Caucasus mountains
Abstract. The article provides an update on the glaciers and periclacial lakes located in the Gularidon River basin (right
tributary of the Karaugomdon River, left tributary of the Terek River) and on changes, that have occurred there over the
last 52 years. The forecast of possible natural hazards processes, that might take place here, is provided.
Gazaev H.-M.M., Bozieva J.H., Agoeva E.A.
Abstract. Monitoring the temperature of the surface layer of the atmosphere from 2011 to 2015 in Bezengi gorge