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Specific Features of the Accumulation and Spatial Distribution of Heavy Metals and Metalloids in Soils of Mining Landscapes (Zakamensk, Buryatia)тезисы доклада
- Авторы: TIMOFEEV I.V., KOSHELEVA N.E.
- Сборник: Book of abstracts of International Geographical Union Regional Conference “Geography, Culture and Society for Our Future Earth”, 17–21 August 2015, Moscow, Russia
- Серия: Thematic Session "Cultural Regionalism and Regional Identity"
- Тезисы
- Год издания: 2015
- Издательство: Izdatel'stvo Moskovskogo Gosudarstvennogo Universiteta im.M.V.Lomonosova/Publishing House of Moscow State University
- Местоположение издательства: Russian Federation
- Первая страница: 1236
- Последняя страница: 1236
- Аннотация: The city of Zakamensk—the center of mining of sulfide- tungsten and molybdenum ores—is one of the “hot spots” in the Selenga River Basin. During 70 years, nearly 44.5 million tons of mine tailings enriched in Pb, Zn, F, Mo, W, Be, Bi, As, and other elements have been accumulated. The aim of our study was to reveal paragenetic associations of heavy metals and metalloids (HMs) in the upper (0–10 cm) horizon of urban soils and determine the main geochemical factors of their accumulation. The soil- geochemical survey of Zakamensk was performed in summer 2012. Soil samples (129 samples, including 24 samples of background soils) were analyzed for the bulk contents of 18 HMs (first–third hazard classes) and other elements by ICP-MS. Paragenetic associations of HMs with common zones of accumulation and discharge were identified using cluster analysis. The influence of natural and anthropogenic factors on the pollutants spatial distribution in soils and technogenic surface formations was estimated by the regression trees method. Two distinct polyelement associations (W–Bi–Be– Cs–Cu–Zn–Cd–Sn and As–Sb–Pb–Mo) and three paragenetic pairs of metals (V–Co, Sr–Ba, and Cr–Ni) were identified. The first two associations of HMs compose highly contrasting geochemical anomalies in the central part of the city with their maximum concentrations in tailings. In the Inkur River valley, where the mining of Au–W placer takes place, the topsoil horizon contains increased concentrations of V and Co. The Sr–Ba association is relatively evenly distributed and is characterized by element concentrations close to corresponding clarke values. The spatial distribution of Be, Bi, Cd, Cs, Cu, Sn, W, Zn, As, Mo, Pb, and Sb is controlled by the levels of anthropogenic loads.
- Добавил в систему: Кошелева Наталья Евгеньевна