A process-oriented study was carried out in White Smoke lake, Bunger Hills, East Antarctica, a perennially ice-covered (1.8 to 2.8 m thick) epishelf (tidally-forced) lake. The lake water has a low conductivity and is relatively well mixed. Sediments are transferred from the adjacent glacier to the lake when glacier ice surrounding the sediment is sublimated at the surface and replaced by accumulating ice from below. The lake bottom at the west end of the lake is mostly rocky with a scant sediment cover. The east end contains a thick sediment profile. Grain size and δ13C increase with sediment depth, indicating a more proximal glacier in the past. Sedimentary 210Pb and 137Cs signals are exceptionally strong, probably a result of the focusing effect of the large glacial catchment area. The post-bomb and pre-bomb radiocarbon reservoirs are c. 725 14 C yr and c. 1950 14C yr, respectively. Radiocarbon dating indicates that the east end of the lake is >3 ka BP, while photographic evidence and the absence of sediment cover indicate that the west end has formed only over the last century. Our results indicate that the southern ice edge of Bunger Hills has been relatively stable with only minor fluctuations (on the scale of hundreds of metres) over the last 3000 years.

中文翻译：

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南极洲东部邦格山绿洲常年冰雪覆盖的表层湖的沉积学和地球化学

在南极洲东部邦格山的白烟湖进行了一项面向过程的研究，这是一个常年被冰覆盖（1.8 至 2.8 m 厚）的表层（潮汐强迫）湖。湖水电导率低，混合较好。当沉积物周围的冰川冰在地表升华并被来自下方的积冰取代时，沉积物从相邻的冰川转移到湖中。湖西端的湖底多为岩石，沉积物很少。东端包含厚厚的沉积物剖面。粒度和δ13C随着沉积物深度的增加而增加，表明过去有更接近的冰川。沉积210铅和137Cs 信号异常强，可能是大冰川集水区的聚焦效应的结果。炸弹后和炸弹前的放射性碳库是C. 72514年和C. 195014年，分别。放射性碳测年表明该湖的东端大于 3 ka BP，而照片证据和没有沉积物覆盖表明西端仅在上个世纪形成。我们的研究结果表明，在过去的 3000 年中，邦格山的南部冰缘相对稳定，只有轻微的波动（数百米的规模）。