The assessment of the natural background of the hydrocarbon (HC) concentrations in soils is an urgent task, the solution of which will allow us to objectively determine soil pollution and promptly introduce restrictions on industrial technologies of oil production, transportation, and refining. The purpose of this work is to assess the background content and to establish patterns of accumulation of HC in the Arctic and Subarctic soils taking into account the landscape-geochemical characteristics of the territories. The concentration of HC in soil samples was determined from the values of the fluorescence intensity of the hexane extract. It has been established that the accumulation and distribution of HC in the soil cover depend on several factors: the topography of the territory and the soil origin, the particle size distribution of the soil-forming rocks, and the content of soil organic matter. The maximum HC content was detected in the soils of accumulative landscapes, while it is minimum—in soils of eluvial territories. The profile differentiation of HC is more pronounced in soils formed on loams and less on sandy rocks. A database and a map of the distribution of natural HC in soils of the Komi Republic have been created.

中文翻译：

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北极和亚北极土壤中天然碳氢化合物含量的景观地球化学评估（俄罗斯科米共和国）

评估土壤中碳氢化合物（HC）浓度的自然背景是一项紧迫的任务，解决该问题的方法将使我们能够客观地确定土壤污染并迅速对石油生产，运输和精炼的工业技术施加限制。这项工作的目的是评估背景内容并建立北极和亚北极土壤中HC的积累模式，同时考虑到该地区的景观地球化学特征。由己烷提取物的荧光强度值确定土壤样品中的HC浓度。已经确定，土壤覆盖物中HC的积累和分布取决于几个因素：领土的地形和土壤起源，土壤形成岩石的粒度分布以及土壤有机质的含量。在累积景观土壤中检测到最大的HC含量，而在坡地土壤中则发现了最小的HC含量。HC的剖面差异在壤土上形成的土壤中更为明显，而在砂质岩石上则较少。已经建立了库米共和国土壤中天然HC分布的数据库和地图。