THE FIRST DATING OF STRONG HOLOCENE EARTHQUAKES IN GORNY ALTAI USING LONG-TERM TREE-RING CHRONOLOGIES
A.R. Agatova1, R.K. Nepop1,2, V.V. Barinov3, A.N. Nazarov3, V.S. Myglan3
1V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
3Siberian Federal University, pr. Svobodnyi 79, Krasnoyarsk, 660041, Russia
Keywords: Dendrochronological analysis, long-term tree-ring chronologies, seismically triggered slope processes, paleoseismicity, Holocene, Altai
Abstract
We present the first results of application of long-term tree-ring chronologies for dating seismically triggered rockfalls and determining the upper age of Holocene rockfalls in southeastern Altai. Based on the results of seismic dendrochronological analysis, dating of penetrating wood injuries is proposed and tested, and the criterion for the distinguishing of seismically triggered rockfalls among slope processes of climatic nature is formulated. An earlier unknown strong earthquake of 1532 has been recognized; its traces are dated by the radiocarbon method. Based on the new data and calibration of earlier radiocarbon dates, the recurrence period of strong earthquakes in the southeastern Altai is refined.
DOI: http://dx.doi.org/10.1016/j.rgg.2014.08.002
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