Geochemical characteristics and provenance of metals in surface sediments of hydrate area, northern south China sea

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY Continental Shelf Research Pub Date : 2024-08-02 DOI:10.1016/j.csr.2024.105298

引用次数: 0

Abstract

Geochemical characteristics and provenance of metals in surface sediments of hydrate area, northern South China Sea has not been reported yet, therefore this paper aimed to reveal metals' distribution, assess the pollution of potentially hazradous metals (Cu, Pb, Zn, Cd, Cr, As, Hg), and inferred provenance of metals using principal component analysis. Twenty-five surface sediments were collected by box sampler from 2014 to 2015 in the national special project on gas hydrate. The concentration of MnO and Hg varied greatly. Most of metals were higher in the north of study area. The sediment was mainly polluted by Hg either pollution status or ecological risk, while it's also moderately polluted by Cr and moderately ecological polluted by Cd. The metals were mainly related to terrigenous detrital, biological source, some volcanic activities, and also little atmospheric deposition. Our findings would further improve the understanding of metals and their related biogeochemical process.

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中国南海北部水合物区表层沉积物中金属的地球化学特征和来源

南海北部水合物区表层沉积物中金属的地球化学特征和来源尚未见报道，因此本文旨在揭示金属的分布，评估潜在有害金属（铜、铅、锌、镉、铬、砷、汞）的污染情况，并利用主成分分析法推断金属的来源。2014 年至 2015 年，在国家天然气水合物专项项目中使用箱式采样器采集了 25 块表层沉积物。氧化锰和汞的浓度差异很大。大部分金属在研究区北部含量较高。沉积物主要受到汞的污染，无论是污染状况还是生态风险，同时也受到铬的中度污染和镉的中度生态污染。这些金属主要与土著碎屑、生物源、部分火山活动以及少量大气沉积有关。我们的发现将进一步加深对金属及其相关生物地球化学过程的了解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.