{"title":"Humification of the Organic Matter in the Surface Bottom Sediments of the East Siberian Sea","authors":"A. A. Mariash, K. I. Aksentov, M. V. Ivanov","doi":"10.1134/S0016702924601864","DOIUrl":null,"url":null,"abstract":"<p>New data on the content of humic substances (HS) in the East Siberian Sea are presented. The results of the studies showed that the degree of humification of organic matter (OM) in the studied samples of the upper layer of bottom sediments of the sea varies from 21 to 9% and averages 15%, which is typical of the low-productivity Arctic seas. It was found that the average HS values (for the considered profiles) were 0.16 and 0.20%, which is typical of oxidized marine sediments. The concentration of organic carbon (C<sub>org</sub>) varied from 0.34 to 1.89% depending on the granulometric type of sediment. It is shown that the total C<sub>org</sub> consists of 10–40% HS, and the HS themselves consist of 12–30% humic acids (HA) and 70–88% fulvic acids (FA), which indicates the early humification of sediments. НAs were determined only in the sediments of the coastal part of the sea. FAs were determined in all studied bottom sediments.</p>","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"63 4","pages":"321 - 331"},"PeriodicalIF":0.7000,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geochemistry International","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0016702924601864","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
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Abstract
New data on the content of humic substances (HS) in the East Siberian Sea are presented. The results of the studies showed that the degree of humification of organic matter (OM) in the studied samples of the upper layer of bottom sediments of the sea varies from 21 to 9% and averages 15%, which is typical of the low-productivity Arctic seas. It was found that the average HS values (for the considered profiles) were 0.16 and 0.20%, which is typical of oxidized marine sediments. The concentration of organic carbon (Corg) varied from 0.34 to 1.89% depending on the granulometric type of sediment. It is shown that the total Corg consists of 10–40% HS, and the HS themselves consist of 12–30% humic acids (HA) and 70–88% fulvic acids (FA), which indicates the early humification of sediments. НAs were determined only in the sediments of the coastal part of the sea. FAs were determined in all studied bottom sediments.
期刊介绍：
Geochemistry International is a peer reviewed journal that publishes articles on cosmochemistry; geochemistry of magmatic, metamorphic, hydrothermal, and sedimentary processes; isotope geochemistry; organic geochemistry; applied geochemistry; and chemistry of the environment. Geochemistry International provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
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