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Composition and structure of the Ledyanaya Gora tabular ground ice body on the Yenisey

1986; Taylor & Francis; Volume: 10; Issue: 4 Linguagem: Inglês

10.1080/10889378609377297

2377-7702

B. I. Vtyurin, Andrey Glazovskiy,

Indigenous Studies and Ecology

Abstract The article presents the results of investigations into the unique ground ice body located on the right bank of the Yenisey River, 120 km upstream from Igarka. It is overlain by flow till with an epi‐genetic type of cryogenic structure and a cryotexture involving coarse, reticulate, thick vertical streaks, with inclusions of lacustrine sediments and Holocene peat. The top of the underlying ice body is uneven and is in some places separated from the flow till by a layer of sand with lenses and bands of extremely bubble‐filled ice. The ice of the ice body contains almost no bubbles; it is characterized by a coarse‐grained structure, elongated crystals and the presence of dirt bands up to 12 cm thick. Isotope and chemical compositions of the ice in the ice body and of the vertical streaks in the flow till have been determined. Two explanations of the genesis of the ice body are advanced: formation of segregation ice underground or the burial of glacier ice.