Ikaite from holocene sediments of the Chukchi Sea

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Abstract

The third finding of ikaite in Holocene sediments of the Chukchi Sea is described. Based on the results of a comprehensive study (mineral, chemical, isotopic composition), a conclusion was made about the formation under low temperatures with the participation of carbon from the oxidation of organic matter and methane.

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About the authors

O. N. Kolesnik

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Author for correspondence.
Email: kolesnik_o@poi.dvo.ru
Russian Federation, Vladivostok

A. N. Kolesnik

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: kolesnik_o@poi.dvo.ru
Russian Federation, Vladivostok

A. A. Karabtsov

Far East Geological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: kolesnik_o@poi.dvo.ru
Russian Federation, Vladivostok

Y. P. Vasilenko

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: kolesnik_o@poi.dvo.ru
Russian Federation, Vladivostok

A. A. Gorbarev

Far Eastern Federal University

Email: kolesnik_o@poi.dvo.ru
Russian Federation, Vladivostok

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Supplementary files

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3. Fig. 1. Map of the Chukchi Sea with sediment core sampling stations (circles), including those containing icalite/glendonite. 1-4 – factual material obtained during the expeditions of the TOI Far Eastern Branch of the Russian Academy of Sciences to the NIS Academician M.A. Lavrentiev: 1 – flight 77 (2016), 2 – flight 83 (2018), 3 – flight 90 (2020), 4 – flight 95 (2021); 5, 6 – literary data: 5 – [2], 6 – [4]

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4. Fig. 2. Visual changes in fragments of icaite crystals from LV90-37 (left) and LV90-44 (right) stations after removal from the refrigerator (a) and exposure to room conditions for half an hour (b), a day (c), two days (d). Calibration grid – 1×1 mm

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5. 3. Diffractograms of an ikaite powder sample from LV90-37 station after removal from the refrigerator (a – pure ikaite) and exposure at room temperature for half an hour (b – ikaite + vaterite + calcite), a day (c – calcite + vaterite + ikaite), two days (d – pure calcite). Interpretation of reflexes – see Table 1S (additional materials are available in electronic form according to the DOI of the article)

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