Geochemical features of varved clays in Gorny Altai and their potential use in glaciological studies
The relevance of the research is caused by the insufficient knowledge of the varved clays glacial lakes of the Gorny Altai from the geochemical point of view and the possibility of modern data application for reconstructing the dynamics of glacial activity on the observed area. The main aim of the s...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1526 |
| Summary: | The relevance of the research is caused by the insufficient knowledge of the varved clays glacial lakes of the Gorny Altai from the geochemical point of view and the possibility of modern data application for reconstructing the dynamics of glacial activity on the observed area. The main aim of the study is to estimate the content of 25 chemical elements including rare, rare-earth and radioactive elements; to analyze their distribution nature in the section of varved clays and to compare the periodicity of elements accumulation in section with the potential sources of rock destruction products from surrounding glaciers. The methods used in the study: gamma-spectrometric method, the method of instrumental neutron activation analysis, analysis of multiple correlation matrix by the Ward's method; statistical analysis, the comparative geographical method. The results. The author has obtained the parameters of 25 chemical elements distribution based on instrumental neutron activation analysis results. The parameters reflect the nature and characteristics of their accumulation in the vertical profile of the varved clays formed in the ancient glacial lake. General trend of chemical elements behavior in varved clays formation was determined. The author defined the accumulation cycles of U, Th, rare-earth elements and their relationships and identified the geochemical elements associations in the section. The formation of geochemical features of Altai varved clays depends on glacial activities dynamics and the mode of glacial lakes. Geochemical study of varved clays glaciofluvial complexes can be used as one of the adjunct criteria in their investigation and for reconstruction of the past glacial situation. |
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| ISSN: | 2500-1019 2413-1830 |