Geology, geography and global energy

Scientific and Technical Journal

Frequency of ashfall in the central part of Iturup Island (Southern Kuriles) during the Holocene: on the basis radiocarbon dating of peat Chiloe lake

2018. №4, pp. 110-117

Degterev A.V. - C.Sc. in Geology and Mineralogy, Senior Researcher, Institute of Marine Geology and Geophysics Far East Branch Russian Academy of Sciences, 1B Nauki st., Yuzhno-Sakhalinsk, Sakhalin Region, 693022, Russian Federation, d_a88@mail.ru

Rydin A.V. - C.Sc. in Geology and Mineralogy, Leading Researcher, Institute of Marine Geology and Geophysics Far East Branch Russian Academy of Sciences, d_a88@mail.ru

Petrov A.Yu. - Engineer, Saint Petersburg State University, 7-9 Universitetskaya naberezhnaya, Saint Petersburg, Leningrad Region, 199034, Russian Federation

The results of tephrochronological studies and radiocarbon dating of the vertical section of a peat bog of the Gniloe lake are presented (the central part of the Iturup Isl., Southern Kuriles). Altogether, 25 visually discernible interlayers of tephra deposited over the last 12,620 В± 120 cal. BP were identified (the total frequency of ash falls was 1 in 500 years). A study of the distribution of volcanic events in time reveals an increase in their frequency, beginning with the middle to late Holocene. The data obtained can be used in future to estimate the volcanic hazard of the territory of Iturup Island.

Key words: Курильские острова, Итуруп, торфяник, тефра, радиоуглеродное датирование, Kuril Islands, Iturup, peat bog, tephra, radiocarbon dating

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