Geochemistry of sediments from Lake Grand, Northeast Russia
| Autor: | V. Ya. Borkhodoev, Pavel S Minyuk |
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| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
Pleistocene Phosphorus Geochemistry Trace element chemistry.chemical_element 010502 geochemistry & geophysics 01 natural sciences Ferromanganese Abiogenic petroleum origin Geophysics chemistry Geochemistry and Petrology Vivianite Cyclic sediments Geology Holocene 0105 earth and related environmental sciences |
| Zdroj: | Geochemistry International. 54:807-816 |
| ISSN: | 1556-1968 0016-7029 |
| DOI: | 10.1134/s0016702916070065 |
| Popis: | Major and trace element distribution in the bottom sediments from Hole 13 drilled in Lake Grand, Magadan district, was studied using the method of principal components. It was established that geochemical characteristics are correlated with environmental changes. The sediments of cold MIS2 and MIS4 are characterized by the enriched TiO2, MgO, Al2O3, Fe2O3, and Cr and low Na2O, K2O contents, which is related to the grain-size composition of sediments. Sediments of warm stages show an opposite tendency. High concentration peaks of iron, phosphorus, and manganese correspond to the accumulation levels of vivianite and ferromanganese rocks. Silica is represented by biogenic and abiogenic varieties. Maximum SiO2 contents were found in the Late Holocene sediments and mark the high biological productivity of the basin. Revealed variations of some elements are correlated with the Heinrich events. |
| Databáze: | OpenAIRE |
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