休廃止鉱山のグリーン・レメディエーションに関する研究動向

[3K0301-10-05] Distribution of Elements and Geochemical Background of River Sediments in Tohoku Region of Japan

○Arie Pujiwati^1,2, Kengo Nakamura¹, Takeshi Komai¹ (1. Graduate School of Environmental Studies, Tohoku University, 2. Ministry of Energy and Mineral Resources, Republic of Indonesia)

司会：五十嵐 敏文（北海道大学）

Keywords:river sediment, return to nature, Geochemical Background, Distribution , statistical analysis

The tohoku region has been observed to have systematically diverse river sediment geochemistry due to its geological features. To the establishment the distribution mechanisms, and to establish the geochemical background values for 53 elements in The calculated distribution function was found to establish the geochemical background ranges in the general area, regions of the natural environment, areas, high anthropogenic influence, and mineralized areas. The multivariate analysis results showed the significance of the first four principal components, which accounted for 65.Rare earth elements (REEs), which are prevalently associated with the distribution of granitic rocks and REE-bearing minerals, was found to be an important feature for the first principal component. In addition, the geochemical background values were also found to elucidate the enrichment of elemental distribution. concentration in mineral deposit areas. though the aforesaid several influences of several anthropogenic activities to the elemental distribution, the natural origins were likely being the prominent source of the elements in the Tohoku region.This study provides an important future for investigations into the geochemical background and environmental quality, especially those involving mineralized areas.