Vol. 49 No. 1 (236) (2015)

The main character in geological structure of copper-porphyritic Kashen deposit belongs to Mesolithic (middle Jurassic, Bathonian age) pyritized secondary quartzites, the origin of which is due to hetero-volcanic fumaroles-solfataric acid gas-water solutes. Copper mineralization is located on the rocks of secondary quartzite formation. In Kashen ore field sericite face of quartzite is exclusively developed. Inner facies are characterized by secondary quartzite-kaolinite, alunite, monoquartzite, sulphur opalite absence in the ore field. Due to fumaroles-solfataric theory these types of quartzite had to be located upper than sericitized quartzite in the higher levels closer to volcanic caldera, but they were not preserved, because of being eroded during more than 170 million years.

The article relates to the impact of seismic inertial forces on the stability of slopes. In the calculation scheme for clay soils with consistency of I_L < 0.5 has been offered to take into account the seismic slope stability of inertial force, and as indicators of shear strength parameters to take the peak strength, on the basis of which to calculate the static stability. For clayey soils with consistency I_L > 0.5 in the calculation scheme of stability is offered to take into account the shear strength parameters, obtained in dynamic tests, conduct static analysis excluding seismic forces.

Mining of Sotk gold deposit is a potential threat to groundwater contamination of the Masrik basin and Lake Sevan. The article presents geologicalhydrogeological specifics of formation, transit and discharge of groundwater in the upper streams of the Sotk River. According to studies, the river's recharge from groundwater is related to drainage waters occurring in eluvial-deluvial sediments. Deeper ground water flow occurs under riverbed, in alluvial-proluvial sediments. Hydrogeological assessment has shown that the velocity and flow rate of groundwater flow are too small and do not contribute to the transport of contaminants through groundwater in considerable amounts.

The application of new methodological approachеs in using morphometric methods and allocation of morphostructure of the Earth Crust sedimentary layer on Northern folded zone of Armenia and its geological interpretation are considered.

Radioactivity, as a process of spontaneous decay of atomic nuclei, the energy is being released through alpha, beta and gamma radiation, which affect both the environment and human beings. Studies show that technogenic radioactive objects' negative impact on the human body is less, than some natural phenomena have.

Political, economic and social-cultural changes in RA during the last 20 years have caused significant changes in population number, structure, distribution, as well as demographic situation. They are more obvious in marzes and regions of RA, particularly, in rural settlements. In the article the population dynamics of rural population of RA, the features of regional changes and problems in 2005–2013 are analyzed.

In the article are discussed the problems of productive using of nature-recourse potential of one of necessary factors for ecologyzation of agriculture of RA. It will be possible with optimization of recourse cycle of soil, climatic and agricultural raw material. This strategy promotes to regulation of nature using, nature protection and also to increasing of productivity of using of nature-recourse potential.

Analysis of the Marz physical-geography role during the formation of thermal regime, estimate the regularities of spatio-temporal distribution of the air temperature is the goal of the work. Close correlation links between absolute height of area and air and soil temperatures, as well as, those between air and soil temperatures have been got. So, in perennial data of Marz observes a tendency of increasing of air and soil temperature values.

The winds blowing in the «Arzni» airdrome area are observed in the article. It is found out that during year in the first half of the day Northern (20%), Northeast (14%) winds prevail and in the second half of the day Northwest (18%), Western (18%) and Southern (15%) winds, the average speed of which for the cold period of the year is 3–6 mps, gusts up to 18–20 mps, and during the warm period of the year the average speed is 4–7 mps, gusts up to 20–25 mps.

Sergey V. Grigoryan, Academician of the National Academy of Sciences of the Republic of Armenia, Doctor of Geological and Mineral Sciences, Professor, the largest geologist-geochemist, turned 80 years old.