Azerbaijan is a country where mud volcanoes are widespread. Mud volcanoes are included in the ranks of the country‘s natural resources. Of the 800 mud volcanoes in the world, more than 300 fall on the territory of Eastern Azerbaijan and the border waters of the Caspian Sea. Here you can find all types of volcanoes: active, extinct, land-continental, oil, island and underwater volcanoes. Thus, in terms of the number, variety and active activity of volcanoes, the territory of our republic has no analogues in the world. Mud volcanoes are widespread, mainly in the territory of Eastern Azerbaijan – on the Absheron Peninsula, in the Shemakha-Gobustan region, in the southeastern Shirvan lowland and in the Baku archipelago. XRF analysis is one of the best analytical methods for performing elemental analysis of all types of samples. Bruker XRF spectrometers combine the highest accuracy with simple and fast sample preparation for the analysis of elements in a concentration range from 100% to below ppm. Each geological sample is a product of the original source material and environmental conditions that existed during its formation. The geochemical composition of mud volcanoes and minerals is responsible for their distinctive characteristics, which make them a valuable resource for scientific research. To study the content of oxides in samples of volcanic mud, samples were taken from the Salyan (Khidirly village), Shamakhi (Gushchu village) and Aghstafa regions. Based on the analysis of the samples, the amount of oxides in the volcanic mud was calculated. To prepare samples for XRD analysis of mud volcanoes taken from the Aghstafa, Shamakhi, and Salyan regions, we used grinding followed by pressing the samples into tablets. The high content of micro-components: iodine, boron, bromine, organic substances, as well as mineralization – the advantage of volcanic mud taken from the Aghstafa, Shamakhi and Salyan regions, distinguishing them from silt and peat mud. Table 1 shows the results of the analysis of volcanic mud taken from the Aghstafa, Shamakhi and Salyan regions. For analysis, 15 grams of volcanic mud were taken, pressed and given in the form of tablets to an X-ray fluorescence spectrometer S8 TIGER. Oxides,% Shamakhi (Gushchu) Salyan (Khidirli) Аghstafa SiO2 64,52 65,30 65,47 Al2O3 12,40 13,20 12,53 CaO 4,25 3,25 3,95 MgO 0,63 0,84 0,6 SO3 0,69 0,38 0,19 K2O 3,45 3,32 3,57 Na2O 3,15 3,24 3,21 TiO2 0,3 0,34 0,29 Mn2O3 0,09 0,1 0,1 P2 O5 0,07 0,082 0,068 Fe2 O3 2,5 2,95 2,47