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首页> 外文OA文献 >Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland
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Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland

机译：波兰西北地区晚更新世沙丘和冰缘谷地石英颗粒的表面纹理重构沉积物来源和运输过程

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摘要

During the Pomeranian phase of the Weichselian glaciation (~17–16 ka), the Toruń-Eberswalde ice-marginal valley (NW Poland and easternmost Germany) drained water from the Pomeranian ice sheet, while intensive aeolian process -es took place across Europe in the foreland of the Scandinavian ice sheet (‘European Sand Belt’). The micromorphology of the quartz grains in the Toruń-Eberswalde ice-marginal valley shows no traces of these aeolian processes, or only vague signs of aeolian abrasion. This is unique among the aeolian sediments in other Pleistocene ice-marginal valleys in this part of Europe. The study of the surfaces of the quartz grains shows that the supply of grains by streams from the south was minimal, which must be ascribed to the climate deterioration during the Last Glacial Maximum, which resulted in a decrease of the discharge of these extraglacial rivers to the ice-marginal valley.
机译：在Weichselian冰河运动的Pomeranian阶段（〜17–16 ka），Toruń-Eberswalde冰缘谷（西北波兰和最东端的德国）从Pomeranian冰盖中排干了水，而强烈的风化过程则在欧洲各地发生。斯堪的纳维亚冰原的前陆（“欧洲沙带”）。托伦-埃伯斯瓦尔德冰缘谷地石英晶粒的微观形态没有显示出这些风成过程的痕迹，或仅显示出风蚀的模糊迹象。这在欧洲这一地区的其他更新世冰缘谷中的风成沉积物中是独特的。对石英颗粒表面的研究表明，来自南方的溪流对谷物的供应极少，这必须归因于上一次冰川最大期期间的气候恶化，从而导致这些冰河河流的排放量减少。冰缘山谷。

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