In connection with that in Ukraine tin deposits are not mined, an important problem is the research of new tin-bearing objects, to that Perha columbite-cassiterite placers belong. On the basis of long-term experience of metallogeny works, that is conducted in the department of geology of minerals in Institute of Geological Sciences of NAS of Ukraine, paleogeomorphological method and structure-lihtological modeling the interpretation of geological information is executed and trends of cassiterite distribution in mineral deposits are selected. The placers are connected with paleovalleys, where the tin-bearing deposits were conserved from late Eocene transgression. The productive deposits are different -grained quartz sands, coarse sandy loams, gravel often kaolinized sands. The prospects for reserves growth of placers are found out in the limits of central part and in the northern endocontact of Ustynivka massif and also on the flanks of Syshchany-Perha zone and directly of Perha deposit.

Full Text

1. Baturin V.P., 1947. The petrographical analysis of geological past on terrigenious complexes, Moscow: Leningrad. the Academy of sciences of USSR, p.335. (In Russian).
2. Berger M.G., 1986. The terrigenious mineralogy, Moscow: Nedra, p. 227. (In Russian).
3. Veklych M.F., 1966. Paleogeomorphology of the Ukrainian shield, Kyiv: Naukova dumka, p. 119. (In Ukrainian).
4. Vysotsky B.L., Popov R.Л. et al., 2002. Geological-economic estimation of Perha ore field. The report of Zhytomyr GE of SSRGE «Pivnichgeologia» of 1997-2002, Kyiv: Zhytomyr GE of SSRGE «Pivnichgeologia».- V.1. p. 253 (In Ukrainian).
5. Galetskiy L.S., Shevchenko T.P., 2001. Transregional oreconcentrating megazones of activation of Ukraine. Geology of the XXI century: the ways of development and prospects, Kyiv: Znannya, pp.70-82. (In Russian).
6. Galetskiy L.S., Romanyuk L.S., 2007. The complex estimation and development of Perha rare metal deposits. Ecological safety of technogenuos overloaded regions and the rational Earth’s bowels usage. Scientific and practical conference. 4-8. Koktebel, AR of Crimea, Kyiv: SPC «Ecology Science Technology», pp.66-68. (In Ukrainian).
7. Grebennikov S.Ye., Lobasov O.P., 2003. The modeling of sedimentation basins in ArcView environment, Mineral resources of Ukraine. No.4. pp.25-31. (In Ukrainian).
8. Gurvich S. I., 1960. New data of stannum content of Ukrainian Shield. Izv. vuzov. Geologija i razvedka. No. 9. рр. 83–86. (In Russian).
9. Sabadash N.Y., 2015. Informational portal about own investments and finances. Available at: http://investfunds. ua/markets/indicators/olovo-lme/
10. Karagodin Yu.N., 1985. The regional stratigraphy. Moscow: Nedra, p. 180. (In Russian).
11. Lunko V.F., Кalnaya М.М., Меtalidi М.V.et al, 1960. The report about results of geological proshecting works on the rare metals conducted by Olevsk party of Zhytomyr expedition in the northern part of Zhytomyr and Rovno regions of the Ukrainian SSR, Kyiv: Kyiv exploration trust of the Ministry of geology and entrails protection of the USSR. V.1. p. 385. (In Ukrainian).
12. Luchitsky V.I., Minakov M.A., 1939. The tin mineralization of the North-Western part of the Ukrainian crystalline ridge. Sov. Geology, V.9, No.4-5, pp. 142-143. (In Russian).
13. Remezova O.O., 1997. The history of the relief of Ovruch ridge and its framing in Mesozoic – Cenozoic. Autoref. of paper on receiving cand. of geographical sciences degree, speciality 11.00.04 «Geomorphology and paleogeography», Kyiv, p. 24. (In Ukrainian).
14. Remezova O.O., 2005. The problems of ilmenite deposits researches of the north-western part of the Ukrainian shield. The collection of scientific works of the National mining university, No. 23. pp.22-27. (In Ukrainian).
15. Romaniuk L., Cherniyenko N., 2013. The geology position of Perzhanskiy ore district within the boundaries of Sushchano- Perzhanska zone of activation. Proceedings of the Fifth Ukrainian scientific Conference of young scientists on the 95-th anniversary of the National Academy of Sciences of Ukraine, Кyiv, p. 59. (In Ukrainian).
16. Rukhin L.B., Under the redaction of Ye.V.Rukhina,1969. The bases of the lithology. The study of the sedimental rocks, Leningrad: Nauka, the 3-d ed. p. 703. (In Russian).
17. Slysh R.А., 1970. The report of the results of prospecting revision works on tantalum and tin conducted in the Middle part of the Sushchany-Perha tectonic zone (Ovruch and Olevsk district of the Zhytomyr region), Kyiv: Zhytomyr expedition of the «Kyivgeologia trust». V. 1. p. 85. (In Ukrainian).
18. Strakhov N.M. Responsible ed. V.N.Kholodov., 2008. The problems of the modern and ancient sedimental process. In 2 vol, Moscow: Nauka, Vol.1. p. 495. (In Russian).
19. Timofeyev P.P., 1983. The formational analysis of the complicated regions, Moscow: Nauka, p. 185. (In Russian).
20. Khrushchov D.P., Lobasov A.P., 2006. The principles of the digital structure-lithological models elaboration for sedimental formation subdivisions, Geological journal, No.2- 3. pp. 90-102. (In Russian).
21. Khrushchov D.P., Lobasov A.P., Geychenko M.V., Kovalchuk M.S., Remezova E.A., Kyrpach Yu.V., Stepanyuk A.V., 2010. The structure-lithological models of the prospective sedimentary formations, Mineral resources of Ukraine, No.4. pp. 39-44 (In Russian).
22. Yazvinsky V.I., 1973. Report of Olevsk GEP of Zhytomyr GE about results of the prospecting of cassitherite placers within the limits of north-western slope of the Ukrainian shield, Kyiv: Zhytomyr GE. V.1. p. 50. (In Ukrainian).