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Geochemistry and Magnetism of Peat Deposits in the Khor–Kiya Interfluve, Sikhote–Alin (Preliminary Results)

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Abstract

This paper presents geochemical, microprobe, paleomagnetic, and rock magnetic data from peat accumulated over the past 10 000 years in the area between the Khor and Kiya rivers (Khabarovsk krai). A horizon ranging in thickness between 75 and 100 cm with elevated concentrations of Ni, Zn, Bi, and Se is identified as a result of comprehensive studies. Magnetite and carbon spherules, as well as native iron found at the bottom of the horizon suggest an impact event that occurred about 5500 years ago. For the first time, peat deposits are a target of paleomagnetic research. Distinct inclination variations of the remanent magnetization vector are established in the horizon at a depth of 50 to 75 cm, which corresponds in time to the “Etrussia” geomagnetic excursion (2500 years ago).

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Notes

  1. The primary experimental paleomagnetic and rock magnetic data can be found in Appendix 1 of the electronic version of the article available from http://itig.as.khb.ru/POG.

  2. The preliminary results of geochemical studies can be found in Appendix 2 of the article at http://itig.as.khb.ru/POG.

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ACKNOWLEDGMENTS

The authors are grateful to reviewers P.S. Minyuk and V.A. Tselmovich for useful comments and suggestions that have significantly improved the article. The authors thank E.Yu. Didenko and O.M. Menshikova for assistance in preparating the text and figures. We are grateful to S.V. Burya for help during fieldwork.

Funding

These studies were financially supported as Ministry of Education and Science of the Khabarovsk Krai no. 112/2018 D and No. 25С/2019 projects.

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Correspondence to A. Yu. Peskov.

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Recommended for publishing by A.A. Sorokin

Translated by T. Koryakina

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Peskov, A.Y., Krutikova, V.O., Zakharchenko, E.N. et al. Geochemistry and Magnetism of Peat Deposits in the Khor–Kiya Interfluve, Sikhote–Alin (Preliminary Results). Russ. J. of Pac. Geol. 14, 169–179 (2020). https://doi.org/10.1134/S1819714020020050

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