Trace metals in soils of the main geomorphological units in the southwestern part of Western Siberia

20th International Scientific Symposium of Students, Postgraduates and Young Scientists on "Problems of Geology and Subsurface Development"

Konstantinova, E.Yu.^1

Tyumen State University, Volodarskogo Street 6, Tyumen

625003, Russia^1

关键词: Coarse sands;    Geomorphologic units;    Geomorphological units;    Negative correlation;    Pb concentration;    Positive correlations;    Soil horizon;    Western siberia;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/43/1/012002/pdf
DOI  :  10.1088/1755-1315/43/1/012002

来源: IOP

【 摘 要 】

Total concentrations of Ti, Cr, Mn, Ni, Cu, Zn, Rb, Sr, and Pb as well as soil granulometric texture were studied for three plot sites representing different geomorphologic units of the southwestern part of Western Siberia: periphery of the upland Tobolsky Mainland, Ishim plain, Turinskaya plain. Interregional difference in the relationship by and among the content of trace elements and particle size distribution of soil horizons is established. Thus, for the soils of Turinskaya plain such interrelations are not observed. For the soils of Ishim Plain moderate negative correlation between Pb concentrations and medium silt, as well as average positive correlations between Zn and fine sand, coarse sand and Pb are found. For the soils of the high terraces of the Irtish and periphery of Tobolsky Mainland interface zone moderate positive correlations between contents of Ti, Zn, Sr and fine sand, weak positive ones between Rb and medium sand, moderate negative ones between Zn and clay, Ti, Ni, Cu, Zn, Rb, Sr, and fine dust, Ti, Cu, Zn, Rb, Sr and medium silt are observed. Consequently, properties and genesis of local parent rocks are significant factors for distribution and accumulation of trace elements in the soils of the southern taiga; at the same time, the processes of bioaccumulation in thick humus horizons of dark gray soils and chernozems apparently play an important part in accumulation and migration of trace elements in forest-steppe soils of Ishim and Turinskaya plains.