N. V. Kozina, L. Ye. Reykhard, M. D. Kravchishina, A. S. Filippov, O. M. Dara, Ye. A. Novichkova, L. A. Lozinskaya, S. V. Slomnyuk
{"title":"First Finding of Vivianite in Kara Sea Bottom Sediments","authors":"N. V. Kozina, L. Ye. Reykhard, M. D. Kravchishina, A. S. Filippov, O. M. Dara, Ye. A. Novichkova, L. A. Lozinskaya, S. V. Slomnyuk","doi":"10.1134/s0001437024700243","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Vivianite, an authigenic mineral from the phosphate class, was discovered in Kara Sea bottom sediments for the first time. Similar finds of vivianite were previously known only for the outer shelf of the Laptev Sea, the northern Barents Sea, and the eastern White Sea. Its presence in the subsurface sedimentary strata indicates desalinization of the surface layer of the sea. Core 7444, sampled in a tectonic depression in the Kara Sea during the first stage of cruise 89 of the R/V <i>Akademik Mstislav Keldysh</i> (2022), uncovered Holocene sedimentary strata up to 6.19 m thick. Coarse-silty and sandy vivianite formations are found throughout the entire core, starting from 0.11 m. Vivianite was investigated by a set of methods: optical microscopy, X-ray diffraction, and scanning electron microscopy with energy dispersive spectroscopy. The morphology, microstructures, and chemical composition of vivianite formations have been studied. Three morphological types of these formations have been identified: micronodules and their intergrowths, crystalline aggregates and their intergrowths, and tubular aggregates.</p>","PeriodicalId":54692,"journal":{"name":"Oceanology","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oceanology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1134/s0001437024700243","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OCEANOGRAPHY","Score":null,"Total":0}
引用次数: 0
Abstract
Vivianite, an authigenic mineral from the phosphate class, was discovered in Kara Sea bottom sediments for the first time. Similar finds of vivianite were previously known only for the outer shelf of the Laptev Sea, the northern Barents Sea, and the eastern White Sea. Its presence in the subsurface sedimentary strata indicates desalinization of the surface layer of the sea. Core 7444, sampled in a tectonic depression in the Kara Sea during the first stage of cruise 89 of the R/V Akademik Mstislav Keldysh (2022), uncovered Holocene sedimentary strata up to 6.19 m thick. Coarse-silty and sandy vivianite formations are found throughout the entire core, starting from 0.11 m. Vivianite was investigated by a set of methods: optical microscopy, X-ray diffraction, and scanning electron microscopy with energy dispersive spectroscopy. The morphology, microstructures, and chemical composition of vivianite formations have been studied. Three morphological types of these formations have been identified: micronodules and their intergrowths, crystalline aggregates and their intergrowths, and tubular aggregates.
期刊介绍：
Oceanology, founded in 1961, is the leading journal in all areas of the marine sciences. It publishes original papers in all fields of theoretical and experimental research in physical, chemical, biological, geological, and technical oceanology. The journal also offers reviews and information about conferences, symposia, cruises, and other events of interest to the oceanographic community.
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