Abstract

Morphological characteristics of three first-year ice ridges were investigated in the Shokalsky Strait in April and May 2019 by hot-water thermal drilling with the recording of penetration rate. Boreholes were drilled along the ice ridge cross-section with an interval of 0.25 m. The ice ridge cross-sectional profiles are presented. The sail height for the investigated ridges varied within 1.8–2.7 m, and the keel draft varied from 7.0 to 9.1 m. The ratio of the keel draft to the sail height was equal to 2.7–5.2, the thickness of the consolidated layer was 2.4–2.7 m. The mean porosity of the unconsolidated part of the keel in the ice ridges made up 28–36%. The porosity distributions for the unconsolidated part of the keel along the drilling profile are given for the analyzed ice ridges. The main feature of one of the ridges was an almost rectilinear slope of the keel, which laterally extended for 16 m.

中文翻译：

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肖卡尔斯基海峡的冰脊：2019 年研究

摘要

2019 年 4 月和 2019 年 5 月在肖卡尔斯基海峡通过热水钻探研究了三个第一年冰脊的形态特征，并记录了渗透率。沿冰脊断面钻孔，钻孔间隔为 0.25 m。给出了冰脊横截面轮廓。被调查的山脊的帆高在 1.8-2.7 m 之间变化，龙骨吃水从 7.0 到 9.1 m 变化。龙骨吃水与帆高之比等于2.7-5.2，固结层厚度为2.4-2.7 m。冰脊中龙骨松散部分的平均孔隙度占 28-36%。对于分析的冰脊，给出了沿钻井剖面的龙骨松散部分的孔隙度分布。