Spatial pattern of naturally occurring radionuclides (NOR): ²²⁶Ra, ²³²Th, ⁴⁰K, and artificial ¹³⁷Cs was studied using soil samples of the multipurpose geochemical survey of the city of Yerevan, capital of Armenia. High purity Ge detector based gamma spectrometry system was used for the determination of radionuclides activity concentrations in urban soils. A combination of compositional data analysis, geochemical mapping and radiological assessment were applied to reveal potential factors of technologically enhanced natural radioactivity and excess lifetime cancer risk for Yerevan’s population due to NOR and artificial ¹³⁷Cs in the urban environment. Statistical methods with the geochemical mapping revealed the great contribution of soil-forming rocks to NOR distribution in urban soils. The spatial distribution of calculated radiological indices and dose rates levels follows the distribution patterns of NOR. The activity concentration of fallout radionuclide ¹³⁷Cs was within the range typical for the studied altitudes. Above baseline activity of ¹³⁷Cs was observed in the north-western and western part of the city that is in typical ranges of ¹³⁷Cs content in soil derived from global radioactive fallout. Urban soils of Yerevan were found radiologically safe, however, igneous rock derived soils are a sink of NOR and the main environmental source of continuous exposure to the residents. Values of excess lifetime cancer risk were higher than mean global value.

使用亚美尼亚首都埃里温市的多功能地球化学调查的土壤样品研究了天然放射性核素（NOR）的空间分布：²²⁶ Ra，²³² Th，⁴⁰ K和人造¹³⁷ Cs。基于高纯锗探测器的伽马能谱系统用于测定城市土壤中放射性核素的活性浓度。结合成分数据分析，地球化学测绘和放射学评估，揭示了由于NOR和人工造成的技术上自然放射性增加和埃里温人口终生癌症风险的潜在因素¹³⁷城市环境中的Cs。地球化学作图的统计方法揭示了成岩岩石对城市土壤NOR分布的巨大贡献。计算的放射学指标和剂量率水平的空间分布遵循NOR的分布模式。放射性核素¹³⁷ Cs的放射性浓度在所研究海拔高度的典型范围内。在该城市的西北部和西部，观测到高于基准线活动的¹³⁷ Cs，其典型范围为¹³⁷ Cs。来自全球放射性尘埃的土壤中的Cs含量。发现埃里温的城市土壤在放射学上是安全的，但是，火成岩衍生的土壤是NOR的汇，并且是居民持续暴露的主要环境来源。终生癌症风险超标值高于平均全球价值。