An assessment of uranium contents and distribution in drinking water limescale has been conducted in the Republic of Bashkortostan (RB), Russia. A total of 515 limescale samples from 262 settlements of the RB were analyzed. The spread of U concentration values in limescale samples ranged from 0.01 to 61.0 μg/g.

Elevated U concentrations in the West of the RB corresponded with the horsts of the granite-gneiss crystalline basement of the South-Tatar Dome and their Eastern slopes, the areas with the Lower Permian red beds and the oil and gas fields. The U migration from the granite-gneiss basement is attributed to the tectonic factor and hydrocarbons movement. Elevated concentrations of U within the South of the RB are associated primarily with the deposits of the Southern Ural brown coal basin. The Bashkir Trans-Urals anomalies are mainly associated with Lower Paleozoic eclogite complex, Devonian and Carboniferous volcanic-sedimentary, carbonate, intrusive formations, as well as the Jurassic cover of terrigenous marine sediments.

The negative anomalies of the spatial distribution of U are located in the area of the Ufimian Plateau mainly composed of limestone.

已在俄罗斯巴什科尔托斯坦共和国 (RB) 对饮用水水垢中的铀含量和分布进行了评估。共分析了来自 RB 的 262 个定居点的 515 个水垢样本。水垢样品中 U 浓度值的分布范围为 0.01 至 61.0 μg/g。

RB 西部的 U 浓度升高与南鞑靼穹顶及其东斜坡的花岗岩-片麻岩结晶基底的地垒、下二叠统红层和油气田的区域相对应。花岗岩-片麻岩基底的铀迁移归因于构造因素和油气运动。RB 南部的 U 浓度升高主要与乌拉尔南部褐煤盆地的沉积物有关。Bashkir Trans-Urals异常主要与下古生界榴辉岩杂岩、泥盆纪和石炭纪火山-沉积、碳酸盐岩、侵入地层以及侏罗纪陆源海相沉积物覆盖有关。

U空间分布负异常位于以石灰岩为主的乌菲米亚高原地区。