Cryptotephra of Lake Khorlakel (Northern Caucasus, Russia)

Authors

  • Mazneva, E.A. 1
  • Aleksandrin, M.Yu. 1
  • Konstantinov, E.A. 1
  • Ponomareva, V.V. 2
  • Portnyagin, M.V. 3
  • Borisov, D.G. 4
    • 1 Institute of Geography Russian Academy of Sciences, Staromonetny lane, 29, build. 4, Moscow, 119017, Russia
    2 Institute of Volcanology and Seismology, Far East Branch of the Russian Academy of Sciences, Piip boulevard, 9, Petropavlovsk- Kamchatsky, 683006, Russia
    3 GEOMAR Helmholtz Center for Ocean Research Kiel, Building 4, East shore campus, Wischhofstr. 1-3, D-24148 Kiel, Germany
    4 Shirshov Institute of Oceanology of Russian Academy of Sciences, Nakhimovskiy prospect, 36, Moscow, 117997, Russia

DOI:

https://doi.org/10.31951/2658-3518-2022-A-4-1497

Keywords:

tephra, tephrochronology, cryptotephra, Lake Khorlakel, volcanic ash

Abstract

A tephrochronological study of the core HOR-1 of bottom sediment from Lake Khorlakel, located 24 km northwest of the Elbrus summit, was carried out. The core was 253 cm length. Deposits are represented by interbedding of thin-layered loams and bio-mineral silt. Six intervals of increased content of cryptotephra from 37,000 to 111,000 shards g dry weight −1 were identified. For a prominent peak of cryptotephra concentration in 214-215 cm, which is hardly noticeable as a whitish layer in the core, a geochemical relationship has been established with the proximal tephra of the Elbrus volcano. The age of this peak is estimated at 5950-6250 cal. yr BP.

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Published

2022-09-02

Issue

2022: №4 (SI:Paleo2022)

Section

Articles

License

Creative Commons License
This work is distributed under the Creative Commons Attribution-NonCommercial 4.0 International License.