Ph.D. Theses

Modern radiation situation on the Absheron peninsula: geological and environmental aspects

Alieva Aziza Rafik

2507.01 - Geophysics, geophysical methods of reconnaissance of the minerals

The dissertation is devoted to the studying of the modern radiation situation on the Absheron peninsula, identification of the nature of natural and anthropogenic anomalies connection of radioactive fields with geological structure.

The assigned tasks were solved through field and laboratory studies performed with the participation of the author. The spatial distribution of the current radiation field оn the territory of Absheron Peninsula, also on the territory of the oil and gas producing enterprises was studied.

An electronic version of the map of the natural radioactivity on the Absheron peninsula has been compiled with appropriate refinements and additions, on which the contaminated areas are schematically shown.

The author also compares the parameters of soil characteristics obtained by microthremor measurements with the natural radiation background and radon field of the central part of Baku. The conducted researches have established that radon concentration in soil depends on the combined factors such as soil radioactivity, soil type, dominant (resonance) frequencies and the coefficient of amplitude amplification of soil vibrations. Direct correlation between radon concentration and radioactivity, also between frequency and amplitude of soil vibrations has been established.In the considered frequency range, the highest radon consecrations are observed at dominant frequency of about 10 Hz and at 1,9-2,1 coefficient ofamplitude amplification of soil vibrations. It was noted that the lowest levels of radon concentration and radioactivity are characteristic for sands, but the highest values are found in (friable unconsolidated rocks with loam, gravel and clay.