In order to evaluate the Holocene palaeoenvironmental evolution of the Ugii Nuur basin, central Mongolia, investigations on chemical and mineralogical properties of lacustrine sediments were carried out on a 630cm sediment core from lake Ugii Nuur. The interpretation of the record is based on a principal component analysis (PCA) of the elemental composition of the samples. The results show that lacustrine deposition started at 10.6 kyr BP. Low lake level conditions were identified during the Early Holocene (10.67.9ky BP). The Mid Holocene (7.94.2 kyr BP) was characterized by generally higher lake levels and thus higher moisture supply, but it experienced strong climatic fluctuations. Arid conditions prevailed from 4.22.8 kyr BP and were followed by a stable, more humid phase until today.
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机译：为了评估蒙古中部Ugii Nuur盆地的全新世古环境演化，在Ugii Nuur湖一个630cm的沉积岩心上对湖相沉积物的化学和矿物学性质进行了研究。记录的解释基于样品元素组成的主成分分析（PCA）。结果表明，湖相沉积始于10.6 kyr BP。在早期全新世（10.67.9ky BP）期间发现了低湖位条件。中全新世（7.94.2 yr BP）的特征通常是湖泊水位较高，因此水分供应较高，但经历了强烈的气候波动。干旱条件从4.22.8年BP开始一直占主导地位，随后是一个稳定，潮湿的阶段，直到今天。
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