| UDC 561:551.79 (571./.64) |
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Biostratigraphy of the Upper Pleistocene-Holocene Valley Deposits of the Middle Sikhote-Alin (Exemplified by the Bolotistoye Placer Field at the Khor River) |
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| © 2018 P. S. Belyanin1, V. V. Ivanov2, S. V. Lesnov3, N. I. Belyanina1, Kh. A. Arslanov4, F. E. Maksimov4 |
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1Pacific Geographical Institute FEB RAS, Vladivostok
2Far Eastern Geological Institute FEB RAS, Vladivostok
3Ros DV Co., Ltd., Khabarovsk
4St. Petersburg State University, St. Petersburg |
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| E-mail: ; ; ;
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| Biostratigraphic Valley deposits in the Middle Sikhote-Alin’, exemplified by the Bolotistoye ore-placer field, rich in gold placers, have been biostratigraphically separated. The data of palynological, radio-carbon, and diatom analyses permitted to establish periodicity of the formation of gold-bearing fluvial deposits and swamp deposits overlapping them. These two Late Cenozoic stages of sedimentation are found synchronic 3 and 1, to the trend of climatic changes. At the first stage, in the Late Pleistocene Interglacial and in the Early Holocene, which correspond to Sea Isotope Stages (SIS) 3 and 1 alluvium with a horizon of gold-bearing sands was accumulated. At the second stage, from the end of the Early Holocene, a thick bed of the swamp facies began to form in the lower reaches of the Bolotisty Creek. |
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| Keywords: Pleistocene, Holocene, valley deposits, alluvium, swamp facies, gold placer, biostratigraphy, spore-pollen analysis, diatom analysis. |
| Full text [In Russian] |
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