Vol. 45 No. 3 (226) (2011)

Armenian Precambrian basement rocks metamorphism P and T conditions are defined applying amphibole thermobarometer by means of 104 amphibole microprobe chemical analyses. Measurements have been done on 2 samples of ophiolitic metabasalte amphibolites of the Precambrian Kasakh suite. The general trend of metamorphism has been defined in the average amphibolite and green-schist facies in ranges Т=420–640℃ and P=1,6–5,7 kbr of low geothermal gradient of 12℃/km. Prograde magneziohornblende-tchermakite and retrograde magnezio-hornblende-actinolite zonation has been revealed, and also relics of kersutite have been found. Relics of kersutite are preserved from primary-magmatic hornblende of the initial basalts.

Within Lernashen site to identify promising areas for sulfide mineralization in complex of geological and geophysical work has been used the method of natural electric field (EF). Efficiency of EF was justified by the presence of active redox processes here. А number of cartographic materials have been made. A number of anomalies in the EF are highlighted. Their relationship to sulphide mineralization is proved by boring.

The efficiency of applying magnetic survey in chromite fields is substantiated. It was pointed, that in Shorja ore field local anomalies of negative and relative minimums of magnetic field are caused by spatial distribution of chromite ore bodies.

The article is about engineering geological classification of white soils. The nature of structural bonds are in classification principles: white soils with hard structural bonds (rocky, semi-rocky soils) and white soils without hard bonds (disperse soils). According to the results of geotechnical investigations of white soils besides classification, characteristic features of white soils engineering geological properties (subsidence, salinity, suffosion etc.) are also brought.

This paper analyses several principles and peculiarities of mathematical modelling in geography as a branch of science. It discusses the questions like what geography gains from mathematics, how geography synthesizes it, what qualitative features it acquires, what changes the applied-constructive potential of this branch actually undergoes. As a result of the use of mathematical modeling in geography, there is a large increase in the constructive and applied potential of the industry, due to which geography is increasingly being introduced into the economy.

On the base of statistical data analysis the results and trends of migration dynamics of population and settlements distribution during the last 15 years are given. Special attention was paid to processes in Marzes during the last years.