The mud volcanoes in the valley of the Sazliyka River and its tributaries are a geological phenomenon that has attracted scientific attention for decades. They are a specific element for the local lowland landscapes. This study focuses on the content of heavy metals in mud volcanoes. The total content of the elements: copper (Cu), zinc (Zn), lead (Pb), manganese (Mn), nickel (Ni), cobalt (Co) and chromium (Cr) in mg/kg (ppm) has been identified. The obtained contents have been analyzed by the clarke of concentration indicator (KK) - the ratio between the content of a given element in a given natural component (soil horizon, vegetation, surface water, etc.) - Ci, and a clarke of the same element in the lithosphere - K: The researched geochemical nature of the local litho-geochemical and soil-geochemical conditions may have been influenced by the geochemical specifics of the materials entering the earth’s surface upon activation of mud volcanoes in the area of study. They might have an impact on the geochemical structure of the bottom sediments in the local river currents and hence the influence on the main river artery Sazliyka River. The obtained results give to some extent information about the geochemical nature of this rare phenomenon for our country.

Landscapes, landscape geochemistry, mud volcanoes, heavy metals, clarke concentration