This study deals with the geology in areas close to a large unexploited uranium deposit and the impact of bedrock characteristics on levels of radionuclides and other elements in soil and biota. Factors influencing soil inventory and ecosystem transfer are discussed, focussing on ²³⁸U, ²²⁶Ra, and ²¹⁰Pb. Field work was carried out in Salangen Valley in Northern Norway. Sampling stations for soil and biota covered different habitats – grassland, birch forest and low alpine heathland. The geological survey confirmed uranium-bearing minerals in granitic gneiss and pegmatites. There was large variation in the local occurrence of uranium, reflecting the irregular nature of the pegmatite. Activity concentrations of ²³⁸U, ²²⁶Ra, and ²¹⁰Pb in surface soil were elevated at sites close to U-enhanced bedrock, compared to sites with other types of bedrock. Particularly high soil levels were found for ²²⁶Ra and ²¹⁰Pb, whereas activity concentrations of ²³⁸U were more variable, depending of local soil characteristics. Levels of other natural radionuclides (⁴⁰K, ²³²Th) merely increased with soil mineral content, and concentrations of heavy metals were generally low at all sites. External dose rate (1 m above ground surface) was closely correlated with ²²⁶Ra levels in soil. Plant levels of ²³⁸U and ²²⁶Ra varied by several orders of magnitude depending on soil level and plant species, whereas plant levels of ²¹⁰Pb and ²¹⁰Po were largely affected by aerial fallout. Berries generally contained lower levels of ²³⁸U and ²²⁶Ra than green plant parts. As was the case for plants, the levels of ²³⁸U in earthworms were strongly correlated with the respective concentrations in the soil. Soil-to-plant transfer was markedly higher for ²²⁶Ra than for ²³⁸U. For both radionuclides, a positive correlation was found between concentration ratios of V. myrtillus (heath) and soil organic matter content. The ²³⁸U concentration ratios for earthworms were generally two orders of magnitude higher than for plants.

这项研究涉及未开发的大量铀矿床附近的地质情况，以及基岩特征对土壤和生物区系中放射性核素及其他元素含量的影响。讨论了影响土壤资源和生态系统转移的因素，重点是²³⁸ U，²²⁶ Ra和²¹⁰ Pb。实地工作在挪威北部的萨兰根山谷进行。土壤和生物区系的采样站覆盖了不同的生境–草地，桦木森林和低海拔的荒地。地质调查证实了花岗片麻岩和伟晶岩中的含铀矿物。铀的局部存在很大的变化，反映了伟晶岩的不规则性质。活性浓度²³⁸ U，²²⁶与其他类型基岩相比，在靠近U增强基岩的位置，表层土壤中的Ra和²¹⁰ Pb升高。发现²²⁶ Ra和²¹⁰ Pb的土壤含量特别高，而²³⁸ U的活度浓度变化更大，这取决于当地的土壤特性。其他天然放射性核素（⁴⁰ K，²³² Th）的水平仅随土壤矿物质含量的增加而增加，而且所有地点的重金属浓度普遍较低。外部剂量率（距地面1 m）与土壤中的²²⁶ Ra水平密切相关。²³⁸ U和^226的工厂水平Ra随土壤水平和植物种类的不同而变化了几个数量级，而²¹⁰ Pb和²¹⁰ Po的植物水平很大程度上受到空中尘埃的影响。浆果中的²³⁸ U和²²⁶ Ra通常低于绿色植物的部分。与植物一样，earth中²³⁸ U的含量与土壤中各自的浓度密切相关。²²⁶ Ra的土壤到植物的转移明显高于²³⁸ U的转移。对于两种放射性核素，桃金娘病（荒地）的浓度比与土壤有机质含量之间存在正相关。在²³⁸的U浓度比通常比植物高两个数量级。