In addition to fluorite, apatite, phosphorite, fluorine is most often associated with tin ore deposits. According to I.G. Magakyan, tin-bearing hydrothermal solutions carry tin in the form of SnF₄, and increased fluorine content in the rock and the presence of fluorine-bearing minerals are a search sign. According to the study of tin deposits in the Far East, tin is transported by hydrothermal solutions in the form of Na₂[Sn(OH,F)₆] compounds. These tin deposits are characterized by the presence of fluorite and increased fluorine content in chlorite and sericite. This was the prerequisite for studying the possibility of using fluorine as one of the indicators in hydrochemical searches for tin ore deposits. Most researchers studied fluorine content in water mainly from the position of biological impact of water on humans (dental caries, dental fluorosis). They noted fluoride deficiency in landscapes with humid climates and relative excess in dry, climates and in areas of modern and ancient volcanism.

The choice of a rational method of concentration of microcomponents of natural waters is one of the main issues in hydrogeochemical prospecting for ore deposits. Practically the most common are several methods of concentration of trace elements: evaporation to dry residue, co-precipitation with cadmium sulfide - the method of the All-Union Institute of Technology and Exploration and the Leningrad Technological Institute and co-precipitation with aluminum hydroxide - the method of the Tomsk Polytechnic Institute. To compare these methods, the geochemical party of the Leningrad Mining Institute in one of the tin-ore mining taiga regions of the Far East from 750 samples were selected 135 for parallel analysis by three methods and about 200 - for control analyses by different methods of concentration ...