Геодинамика и тектонофизика (Sep 2020)

Archive data on climate changes and seismic events in glacial clays of Lake Kucherla (Altai region, Russia)

  • A. V. Darin,
  • G. Chu,
  • Q. Sun,
  • V. V. Babich,
  • I. A. Kalugin,
  • T. I. Markovich,
  • V. S. Novikov,
  • F. A. Darin,
  • Y. V. Rakshun

DOI
https://doi.org/10.5800/GT-2020-11-3-0495
Journal volume & issue
Vol. 11, no. 3
pp. 624 – 631

Abstract

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Core samples taken from the bottom sediments of the glacial Lake Kucherla (Gorny Altai, Russia) clearly show annual layers represented by glacial clays. In our study, age-depth modeling is based the varve chronology and Cs-137, Pb-210 and C-14 isotope data. Our model is a highly accurate and reliable demonstration of the annual sedimentation history within the past 1400 years. The time series of geochemical indicators of climate change were obtained by synchrotron radiation micro X-ray fluorescence (SR-μXRF) core scanning. Instrumental meteorological observations from 1940 to 2016 were used to construct transfer functions for the average annual temperatures and atmospheric precipitation amounts. A geochemical trace of a catastrophic seismic event, the Mongolian earthquake of 1761, was found in the cross-section of the bottom sediments.

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