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| DOI | 10.18799/24131830/2024/3/4511 |
| Elemental speciation of the sediments from cold methane seeps on the Laptev Sea shelf | |
| 发表日期 | 2024 |
| ISSN | 2500-1019 |
| EISSN | 2413-1830 |
| 起始页码 | 335 |
| 结束页码 | 3 |
| 卷号 | 335期号:3 |
| 英文摘要 | Relevance. The lack of elemental speciation data in the bottom sediments of the Laptev Sea, as well as the absence of its quantitative changes in occurrence forms in response to methane emissions. Aim. To assess changes in the elemental speciation in areas where methane -containing fluids are discharged. Objects. Nine samples of bottom sediments taken from three horizons of one cold seep and two background stations of the outer shelf -continental slope of the Laptev Sea during the AMK-82 expedition aboard R/V Academician M.V. Keldysh in autumn 2020. Methods. Sequential extraction BCR (the European Community Bureau of Reference) was performed to determine the elemental speciation in surface sediments; the residual fraction was determined by dissolving in nitric acid. The obtained fraction solutions were analyzed by ICP-MS (NexIon 300D, Perkin Elmer, Waltham, MA, USA), Pyrolysis (Rock-Eval 6 Turbo, Vinci Technologies). Results. The trend towards an increase in element mobility has been identified as a result of a shift in geochemical conditions that is presumably caused by the authigenic carbonate and sulfide formation. Moreover, the increase in the recoverable fraction (associated only with Fe oxides/hydroxides) is highlighted. We assume that the process of unloading methane -containing fluids plays a significant role in enrichment of authigenic carbonates U, Ni, Zn Co, oxides Fe - Sn and V, authigenic sulfides - Co, Mn and W. We also assume the potential formation of chalcopyrite as an authigenic sulfide in methane discharge areas. |
| 英文关键词 | selective extraction; sequential extraction; BCR; sediments; cold seep; methane emission; Laptev Sea; authigenic carbonate formation; authigenic sulfide formation |
| 语种 | 英语 |
| WOS研究方向 | Engineering |
| WOS类目 | Engineering, Geological |
| WOS记录号 | WOS:001195682700008 |
| 来源期刊 | BULLETIN OF THE TOMSK POLYTECHNIC UNIVERSITY-GEO ASSETS ENGINEERING
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299156 |
| 作者单位 | Tomsk Polytechnic University; Ilichev Pacific Oceanological Institute; Russian Academy of Sciences |
| 推荐引用方式 GB/T 7714 | . Elemental speciation of the sediments from cold methane seeps on the Laptev Sea shelf[J],2024,335(3). |
| APA | (2024).Elemental speciation of the sediments from cold methane seeps on the Laptev Sea shelf.BULLETIN OF THE TOMSK POLYTECHNIC UNIVERSITY-GEO ASSETS ENGINEERING,335(3). |
| MLA | "Elemental speciation of the sediments from cold methane seeps on the Laptev Sea shelf".BULLETIN OF THE TOMSK POLYTECHNIC UNIVERSITY-GEO ASSETS ENGINEERING 335.3(2024). |
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