Ira Tsoy

head of laboratory
Science degree
Doctor of Geological and Mineralogical Sciences
  • Department of Biology and Soil of the Far Eastern State University (at present Far Eastern Federal University) (Vladivostok), 1974
  • PhD thesis "Neogene assemblages of diatoms and silicoflagellates of the Sea of Japan (stratigraphy and paleogeography)" in the specialty Paleontology and Stratigraphy, 1991
  • Doctoral thesis "Conditions of formation of the Cenozoic sedimentary cover of the Far Eastern seas and the island slope of the Kuril-Kamchatka Trench (according to micropaleontological data)" in the specialty Oceanology, 2012.


Area of expertise
Происхождение и кайнозойская эволюция окраинных морей Северо-Западной Пацифики на основе изучения кремнистых микроископаемых, а также таксономия и палеоэкология кремнистых микроводорослей – диатомей и силикофлагеллат.
Research fellowhsip affiliation
I.B. Tsoy is a member of Russian Paleontological Society.
Research fellowships

Member of Russian Paleontological Society

Key publications
  1. Tsoy I.B., Vashchenkova N.G., Gorovaya M.T., & Terekhov E.P. On the discovery of continental deposits on the Yamato Rise // Tikhookeanskaya Geologiya. 1985. No. 3. P. 50-55.

  2. Berverkhny V.L., Bersenev I.I., Vashchenkova N.G.,Gorovaya M.T., Lelikov E.P., Tsoy I.B. Geological structure of the northern closure of Central Deep Sea Basin of the Sea of Japan// Tikhookeanskaya Geologiya. 1988. No. 4. P. 15-22.

  3. Tsoy I.B. Neogene diatom assemblages of the Japan Sea // Proceedings of the 10th Intern. Diatom Symp., Joensuu, Finland, August 28 - September 2, 1988. Koenigstein, Germany: Koeltz Scien Books. 1990. P. 223-241.

  4. Tsoy I.B., Ryaben'kaya I.A., Pletnev S.P. 1994. Quaternary biostratigraphy of the Northwest Pacific: RV Vinogradov Cruise 91-AV-19 Leg 4. Cooperative Program in the Geochemistry of Marine Sediments (GEMS). Open File Report 94-230. P. 249-262.

  5. Nechaev V.P., Sorochinskaya A.V., Tsoy I.B., Gorbarenko S.A. 1994. Clastic components in Quaternary sediments of the northwest Pacific and their paleo-oceanic significance. Marine Geology, 118: 119-137.

  6. Wong C.S., Whitney F., Tsoy I.B. & Bychkov A.S. 1995. The opal pump and subarctic carbon removal. In: Global Fluxes of Carbon and Its Related Substances in the Coastal Sea-Ocean-Atmosphere System. Proceedings of the 1994 Sapporo IGBP Symposium, S. Tsunogai et al., Eds., M & J International, Yokohama, Japan. P. 339-344.

  7. Tsoy I.B., Shastina V.V., Biryulina M.G. Seasonal Fluxes of microplankton in the Meiji Guyot Area (Northwestern Pacific) // Russian Journal of Marine Biology. 1998. 24 (5):306-312

  8. Tsoy I.B., Wong C.S. Diatom fluxes and preservation in the deep North West Pacific. 14th International Diatom Symposium, Tokyo, Sept. 2-8, 1996. Proceedings of the 14th Intern. Diatom Symposium. Koenigstein, Germany: Koeltz Scien. Books. 1999. P. 523-549.

  9. Lipkina M.I., Tsoy I.B. On the age and the Phosphate mineralization genesis in the North Yamato Rise (the Sea of Japan) // Russian Journal of Pacific Geology. 1999. 18(4): 99-105

  10. Tsoy I.B.Oligocene diatom assemblages from the Island slope of the Kuril-Kamchatka Trench // Oceanology. 2002. 42(2):252-265

  11. Baranov B.V., R. Werner, K. A. Hoernle, I. B. Tsoy, P. van den Bogaard, I. A. Tararin. Evidence for compressionally-induced high subsidence rates in the Kurile Basin (Okhotsk Sea) // Tectonophysics. 2002. Vol. 350 (1). P. 63-97.

  12. Tsoy, I.B. Eocene Diatoms and Silicofl agellates from the Kronotskii Bay Deposits (East Kamchatka) // Stratigraphy. Geological Correlation. 2003: 11: 72–87.

  13. Karnaukh V.I., Karp B.Ya., Tsoy I.B. Seismic stratigraphy of the sedimentary cover and the sedimentation on the Pervenets Rise and in the adjacent areas (Japan Sea) // Oceanology. 2005. 45(1):118-129

  14. Tsoy I.B., Terekhov Y.P., Shastina V.V., Gorovaya M.T., & Mozherovsky A.V. // Age of the Kotikovaya Group in the Terpeniya Peninsula (Eastern Sakhalin) // Stratigraphy and Geological Correlation. 2005. 13(6):632-643

  15. Kulinich R.G., Karp B.Ya., Baranov B.V., Lelikov E.P., Karnaukh V.N., Valitov M.G., Nikolaev S.M., Kolpashchikova T.N., & Tsoy I.B. Structural and Geological Characteristics of a "Seismic Gap" in the Central Part of the Kuril Island Arc // Russian Journal of Pacific Geology. 2007. 1(1):3-14. DOI: 10.1134/S1819714007010022

  16. Karnaukh V.I., Karp B.Ya., Tsoy I.B. Seismostratigraphy and sedimentation environment on the shelf and continental slope of Peter the Great Bay (Sea of Japan) // Oceanology. 2007. 47(2):261-272. DOI: 10.1134/S0001437007020129

  17. Karnaukh V.I., Karp B.Ya., Tsoy I.B. Basement structure and sedimentary cover seismostratigraphy in the northern part of the Japan Basin in the region of the Tarasov Rise (Sea of Japan) // Oceanology. 2007b. 47(5):691-704. DOI: 10.1134/S0001437007050128

  18. Gorbarenko S.A., Tsoy I.B., Astakhov A.S., Artemova A.V., Gvozdeva I.U., & Annin V.K. Paleoenvironmental changes in the northern shelf of the Sea of Okhotsk during the Holocene // Stratigraphy and Geological Correlation. 2007. 15(6):656-671. DOI: 10.1134/S0869593807060044

  19. Lelikov E.P., Tsoy I.B., Terekhov E.P., S’edin V.T., Vashchenkova N.G., Nabiullin A.A. Geology and dredged rocks from the Sea of Japan Floor: Part 1 // New Concepts in Global Tectonics Newsletters. 2007. No. 45. P. 5-20.

  20. Lelikov E.P., Tsoy I.B., Terekhov E.P., S’edin V.T., Vashchenkova N.G., Nabiullin A.A. Geology and dredged rocks from the Sea of Japan Floor: Part 2 // New Concepts in Global Tectonics Newsletter. 2008. N 46. P. 4-18.

  21. Lelikov E.P, Tsoy I.B., Emelyanova T.A., Terekhov E.P., Vashchenkova N.G., Vagina N.K., Smirnova O.L., & Khudik V.D. Geological Structure of the Submarine Vityaz Ridge within the Seismic Gap Area (Pacific Slope of the Kurile Island Arc) // Russian Journal of Pacific Geology. 2008. 2(2):99-109. DOI: 10.1134/S1819714008020012

  22. Tsoy I. B., Vagina N. K. Paleontological Characteristics of the Upper Cenozoic Sediments and Environmental Changes in the Peter the Great Bay Area (Sea of Japan) // Russian Journal of Pacific Geology, 2008, Vol. 2, No. 3, pp. 38–53.

  23. Terekhov E. P., Tsoy I. B., Vashchenkova N. G., Mozherovskii A. V., Gorovaya M. T. Sedimentation Settings and Evolution History of the Kuril Basin (Sea of Okhotsk) in the Cenozoic // Oceanology, 2008, Vol. 48, No. 4, pp. 609–617. 10.1134/S0001437008040115

  24. Terekhov E.P., Mozherovsky A.V., Gorovaya M.T., Tsoy I.B., Vashchenkova N.G. Composition of the rocks of the Kotikovo Group and the main stages in the Late Cretaceous-Paleogene evolution of the Terpeniya Peninsula, Sakhalin Island // Russian Journal of Pacific Geology. 2010. 4(3):260-273. DOI: 10.1134/S1819714010030085

  25. Karnaukh V.N., Tsoy I.B. Stratigraphy and formation conditions of the sedimentary cover in the Sea of Japan near the Bogorov Rise // Oceanology, 2010, Vol. 50, No. 4, pp. 556–572. DOI: 10.1134/S0001437010040120

  26. Usoltseva M.V., Tsoy I.B. Elliptical species of the freshwater genus Aulacoseira in Miocene sediments from Yamato Rise (Sea of Japan) // Diatom Research. 2010. V. 25. № 2. 2010. С. 397-415.

  27. Tsoy, I.B. Silicofl agellates of the Middle–Early Late Eocene of the Kronotskii Bay (Eastern Kamchatka) // Stratigraphy. Geological Correlation. 2011a. 19: 87–101.

  28. Tsoy, I.B. Silicoflagellates of the Oligocene to Early Miocene from the submarine Vityaz Ridge (Island slope of the Kuril-Kamchatka Trench), Russia // Algologia. 2011b. 21: 108–122.147.

  29. Terekhov E.P., Tsoy I.B., Mozherovsky A.V., Vagina N.K. Pliocene Sediments of Shikotan Island (Lesser Kuril Ridge) // Stratigraphy and Geological Correlation. 2011. 9(3):337-351. DOI: 10.1134/S0869593811030105

  30. Vashchenkova N. G., Gorovaya M. T., Mozherovskii A. V., Tsoy I. B. Sedimentary Cover and Late Cenozoic History of the Okushiri Ridge (Sea of Japan) // Stratigraphy. Geological Correlation. 2011. Vol. 19, N 6. P. 663-678. 10.1134/S0869593811060086)

  31. Lelikov E.P., Tsoy I.B., Vagina N.K., Emelyanova T.A., Terekhov E.P., Khudik V.D. Geological Structure of the Kashevarov Trough (Central Sea of Okhotsk) // Russian Journal of Pacific Geology. 2011. 5(5):387-399. DOI: 10.1134/S1819714011050046

  32. Terekhov E. P., Mozherovsky A. V., Tsoy I. B., Lelikov E. P., Vashchenkova N. G., Gorovaya M. T. Late Mesozoic and Cenozoic Volcanosedimentary Complexes from the Submarine Vityaz Ridge, the Island Arc Slope of the Kuril–Kamchatka Trench, and Its Evolution // Russian Journal of Pacific Geology. 2012. Vol. 31, N 3. P. 209-216)

  33. Tsoy I.B., Karnaukh V.N., Lelikov E.P. Naming undersea features of the Sea of Japan: History and modern problems // Oceanology. 2013. V. 53. № 6. P. 715-726. DOI:10.1134/S0001437013060076

  34. Karnaukh V.N., Tsoy I.B., Lelikov E.P., Emelyanova T.A., Vashchenkova N.G., Terekhov E.P. Geology of the Peter the Great Seamount (Sea of Japan) // Vestnik FEB RAS. 2013. № 6. P. 189-197.

  35. Tsoy I.B., Moiseenko I.A. Diatoms from Surface Sediments of Amurskiy Bay, Sea of Japan // Russian Journal of Marine Biology. 2014. Vol. 40. № 1. P. 10–23. doi: 10.1134/S106307401401009X

  36. Tsoy I.B., Olshtynskaya A.P. Peponia fenneriae sp. nov. (Bacillariophyta) from Middle Eocene (Far East, Russia) // Algology. 2014. DOI: 10.15407/alg24.02.222

  37. Tsoy I.B. Upper Oligocene–Lower Miocene diatom assemblages of the submarine Vityaz Ridge (Island slope of the Kuril-Kamchatka Trench) // Stratigraphy and Geological Correlation. 2014. V. 22. No. 6. P. 618-631.DOI:10.1134/S0869593814060069

  38. Vashchenkova N.G., Tsoy I.B. Composition and Conditions for Formation of Neogene Deposits at the Primorye Continental Slope in the Area of Vladimir Bay in the Sea of Japan. Oceanology. 2014. V. 54, No 4. P. 478-489.

  39. Karnaukh V.N., Astakhov A.S., Vereshchagina O.F., Tsoy I.B., Kosmach D.A., Sagalaev S.G., Volkova T.I., Dubina V.A., Prushkovskaya I.A. Formation of subsurface shallow gas accumulations in Amurskiy Bay (Peter the Great Bay, Sea of Japan) as a result of postglacial sea-level change, paleoceanographic conditions and hydrological activity // Marine Geology. 2016. V. 372. P. 31-52. doi:10.1016/j.margeo.2015.12.004

  40. Tsoy I.B., Prushkovskaya I.A., Aksentov K.I., Astakhov A.S. Environmental changes in the Amur Bay (Japan/East Sea) in the past 150 years on the basis of diatoms and silicoflagellates // Ocean Science Journal. 2015. V. 50. № 2. P. 433–444. 0039-8.

  41. Tsoy I.B., Usoltseva M.V. Miocene Freshwater Diatoms from the Eastern Slope of the Submarine Ulleung Plateau (Krishtofovich Rise) in the Sea of Japan // Stratigraphy and Geological Correlation. 2016. Vol. 24. No. 3. P. 276–293. DOI: 10.1134/S0869593816020064

  42. Tsoy I.B., Gorovaya M.T., Vasilenko L.N., Vashchenkova N.G., Vagina N.K. Age and Conditions of Formation of Sedimentary Cover of the Ulleung Plateau of the Sea of Japan According to Micropaleontological Data // Stratigraphy and Geological Correlation. 2017. Vol. 25, No 1. P. 99-121. Doi: 10.1134/S08695938170100063

  43. Tsoy I.B., M.S. Obrezkova, K.I. Aksentov, A.N. Kolesnik, V.S. Panov. Late Holocene Environmental Changes in the Southwestern Chukchi Sea Inferred from Diatom Analysis // Russian Journal of Marine Biology. 2017. Vol. 43. No. 4. P. 276–285. DOI: 10.1134/S1063074017040113

  44. Tsoy I.B. Early Miocene diatom flora from the Yamato Rise, the Sea of Japan // Diatom Research. 2017. V. 32 (3). P. 277-293. DOI: 10.1080/0269249X.2017.1367726

  45. Kovtunovich P.Yu., Chumakov L.M., Tsoy I.B. New data on the ages of the Matituk and Pomyr formations of Northern Sakhalin // Russian Journal of Pacific Geology. 2018. V. 12. № 4. P. 303-319. doi:10.1134/S1819714018040036

  46. Olshtynska A.P., Tsoy I.B. Silicoflagellates of the Late Eocene to Early Oligocene of Eastern Paratethys (Azov Sea area of Ukraine) // Nova Hedwigia. Beiheft 147. P. 141-150. doi:10.1127/nova-suppl/2018/013

  47. Obrezkova, M.S., Tsoy, I.B., Semiletov, I.P., Vagina, N.K., Karnaukh, V.N., Dudarev, O.V. Micropaleontological assessment of sediments from Buor-Khaya Bay (Laptev Sea) // Quaternary International. 2019. V. 508. P. 60-69.

Advanced research

Micropaleontology (diatoms and silicoflagellates) for biostratigraphy, paleooceanology, and paleogeography of Cenozoic and Quaternary

Involvement in national and international projects
Руководила проектами РФФИ, ДВО РАН, Дальний Восток, является исполнителем проектов Дальний Восток, РФФИ и РНФ.

Fulltext publications