Sedimentary strata contain a unique record of environmental and climatic changes in Central Antarctica over the past 20–30 Ma and their sampling and study is of utmost importance. The lake beneath Vostok Station (thickness of water layer) is estimated as 600 m and sediment thickness as less than a few hundred meters. Strict environmental safety requirements preclude the use of conventional drilling technology to avoid drilling fluid contaminating the lake water, and thus the development of special technology is imperative. This paper provides a predictive geological cross-section of southern Lake Vostok and the potential sub-bottom strata including a technical solution for lake bottom sampling in 5 G borehole at Vostok Station.

沉积地层包含过去20–30 Ma内南极中部的环境和气候变化的独特记录，对其取样和研究至关重要。沃斯托克站下方的湖泊（水层厚度）估计为600 m，沉积物厚度小于几百米。严格的环境安全要求排除了使用常规钻井技术的可能性，以避免钻井液污染湖水，因此必须开发特殊技术。本文提供了南部沃斯托克湖的预测地质剖面和潜在的下层地层，包括沃斯托克站5 G钻孔湖底采样的技术解决方案。