Abstract

The microelement composition of the vertical section of bottom sediments in the Black Sea has been studied. The analysis of the calculated enrichment factors relative to the mean composition of the Earth’s crust has shown that the lithogenic source dominates for most microelements. We revealed a significant enrichment with Ca and Sr (due to bioaccumulation) and with S, As, and Mo (as a result of hydrogen sulfide contamination and the effect of mud volcanoes). The calculated indicator ratios of elements allow evaluation of the presence of exhalation components in sediments (Fe + Mn/Ti) and of the transportation distance of terrigenous material (Ti/Zr). Paleoreconstruction of salinity (C_org/S) and oxidation-reduction conditions in the bottom water layer (Mn/Fe, Mo/Mn, V/(V + Ni), and V/Mn) was performed.

中文翻译：

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黑海海底沉积物垂直剖面中元素的分布

摘要

研究了黑海底部沉积物垂直剖面的微量元素组成。对相对于地壳平均成分计算的富集因子的分析表明，成岩源在大多数微量元素中占主导地位。我们发现Ca和Sr（由于生物富集）以及S，As和Mo（由于硫化氢污染和泥火山的影响）显着富集。计算出的元素指示剂比率可以评估沉积物中呼气成分的存在（Fe + Mn / Ti）和陆源物质的运输距离（Ti / Zr）。进行盐度（C _org / S）的古构造和底部水层（Mn / Fe，Mo / Mn，V /（V + Ni）和V / Mn）的氧化还原条件。