Abstract
The results of thermomagnetic and microprobe studies of basalts of the Zhom-Bolok lava river (East Sayan) are given in the article. On the example of the Zhom-Bolok basalt lava river the process of settling of metallic iron particles in a basaltic lava has been demonstrated. Some of examples show the distribution of metallic iron particles during their settling within basaltic lava flows. It has been shown that the main source of metallic iron in lake sediments is the volcanic rocks of the Zhom-Bolok basaltic lava river, detrital material being created through erosion and weathering. Out of numerous studied objects Zhom-Bolok region is a single example of significant enrichment of sediments with metallic iron of terrestrial origin in the immediate vicinity of large eruptions of basaltic lava. Accordingly the halo of scattering of metallic iron particles from the centers of volcanic eruptions and/or the fall of large meteorites and other cosmic bodies to Earth is very limited.
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Acknowledgments
We are extremely grateful to the reviewer A. Kosterov for a detailed in-depth review and careful editing of the English text.
The geological part of the research was supported by RFBR grant 15-05-01811 and RSF grant 16-17-10079, microprobe—RFBR 16-05-00703a, thermomagnetic measurements—with the support of the RF Government grant No. 14.Z50.31.0017. This study has also been carried out following the plans of the scientific research of the Geological Institute of RAS (for AYK, project no 0135-2016-0009).
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Pechersky, D.M., Kazansky, A.Y., Kozlovsky, A., Markov, G.P., Shchetnikov, A.A., Tselmovich, V.A. (2019). Basalts of the Zhom-Bolok Lava River as a Possible Sources of Metallic Iron in Sediments of Local Lakes: Thermomagnetic and Microprobe Justification. In: Nurgaliev, D., Shcherbakov, V., Kosterov, A., Spassov, S. (eds) Recent Advances in Rock Magnetism, Environmental Magnetism and Paleomagnetism. Springer Geophysics. Springer, Cham. https://doi.org/10.1007/978-3-319-90437-5_22
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