Data on the mineralogy and geochemistry of rare earth elements (REE + Y) in water, suspended matter and stratified sediment cores from different parts of Lake Onego are presented. The study finds that the dissolved REE + Y in the water from different areas of Lake Onego have common features: (1) a maximum in the area of middle rare earth elements (MREE), (2) a distinct negative Ce anomaly and (3) a positive Eu anomaly. Comparison of the average concentration of elements in the stratified core of the bottom sediments and particulate matter (from the filters and sedimentation traps) from different parts of Lake Onego and the distribution of REE + Y do not reveal any significant differences. The trend of the REE + Y distribution for samples from the South Onego completely coincide the REE + Y distribution in siltstones and sandstones of the Russian Platform Scale Composite (RPSC). In the water area of Lake Onego from south to north, a well-defined trend of changes in REE + Y patterns relative to the RPSC is revealed, with depletion by heavy REE + Y and gradual enrichment by light rare earth elements (LREE).

Geochemical and mineralogical data confirm our hypothesis of a significant reformatting of the catchment basin of the Onego Ice Lake in the Late Pleistocene. During the formation of the preglacial lake, a significant part of the catchment area was located south of Lake Onego and is mainly represented by Russian Platform sedimentary rocks. Due to the degradation of the Last Glacier from the Lake Onego depression and the nearby territories, the catchment area changed of its southern and south-eastern sections. Today the composition of the modern sedimentary matter entering Lake Onego is determined by mixing clusters from two geochemically contrasting feeding areas: loose sediments formed by the repeatedly re-deposited products of the weathering of the Fennoscandian Shield's crystalline rock massifs, including Phanerozoic sediments; and to a lesser extent the sediments of the sedimentary cover of the Russian Platform, except the bottom sediments of the South Onego, in which Phanerozoic sedimentary formations have completely predominated throughout the lake's development.

介绍了奥内戈湖不同部分的水中、悬浮物和分层沉积物岩心中稀土元素 (REE + Y)的矿物学和地球化学数据。研究发现奥涅戈湖不同区域水中溶解的REE+Y具有共同特征：（1）中稀土元素（MREE）区域最大，（2）明显的负Ce异常和（3 ) 正 Eu异常。比较来自奥内戈湖不同部分的底部沉积物和颗粒物（来自过滤器和沉积陷阱）的分层核心元素的平均浓度以及 REE + Y 的分布没有发现任何显着差异。来自 South Onego 的样本的 REE + Y 分布趋势与俄罗斯地台尺度复合材料 (RPSC) 的粉砂岩和砂岩中的 REE + Y 分布完全一致。在奥内戈湖水域，从南到北，REE + Y 模式相对于 RPSC 的变化趋势明确，重 REE + Y 耗竭，轻稀土元素 (LREE) 逐渐富集。

地球化学和矿物学数据证实了我们的假设，即更新世晚期 Onego 冰湖的集水盆地发生了重大重组。在冰前湖形成期间，很大一部分集水区位于奥涅戈湖以南，主要以俄罗斯台地沉积岩为代表。由于奥尼戈湖洼地和附近地区的最后冰川退化，集水区的南部和东南部发生了变化。今天，进入奥内戈湖的现代沉积物质的组成是由来自两个地球化学对比鲜明的补给区的混合簇决定的：由芬诺斯堪地亚地盾的风化作用反复重新沉积的产物形成的松散沉积物结晶岩块，包括显生宙沉积物；以及在较小程度上俄罗斯平台沉积盖层的沉积物，除了南奥内戈的底部沉积物，其中显生宙沉积层在整个湖泊的发展过程中完全占主导地位。