中文摘要：

青藏高原贵德盆地东部黄河北岸二连村一带沿山前河谷地带分布着数个大型黏土质凹凸不平地貌台地,其发育特征、成因及演化过程一直是个谜。在野外调查、地质钻探、样品测试和高分辨率遥感影像解译的基础上,分析了末次冰期以来二连村黏土台地、泥流扇的成因机制以及与河道演变的地貌过程,研究了二期泥流扇的粒度和矿物组分,分析了泥流扇的发育特征和堆积次序,主要取得以下认识：（1）黄河北岸面积广布的黏土质高台地凹坑物质组成碳酸盐含量高,是在半干旱的高海拔区由降水作用下形成的一种特殊洪积地貌-泥流扇;（2）二连泥流扇主要有2个发育期次,早期形成于16kaB.P.以前的末次冰期最盛期,晚期于8 kaB.P.开始堆积,两期泥流扇均受气候变化制约,揭示了1.6万年前的末次冰期时期青藏高原东北部地区出现过较多的降水,是冷湿气候环境;（3）黄河河道在二连村地区16 kaB.P.以前、16 kaB.P.～8kaB.P.和8kaB.P.以来分别经历了泥流扇的堆积期-侵蚀破坏期-堆积期等3个阶段,8kaB.P.以来,黄河河道至少向南移动了1.25 km。

英文摘要：

There are several argillaceous platforms with uneven surface lying along the north bank of the Yellow River（ YR） in the eastern part of the Guide Basin in the NE Tibetan Plateau. The material composition,the forming process of the platforms and the gemology evolution process of the YR are a mystery. Based on field survey,sample test and high resolution remote sensing image interpretation,the authors analyze the formation mechanism of the two-stage mud flow fans and gemology evolution process of the YR since the Last Glacial,examine the particle size and mineral component. The results show that（ 1） the carbonate content of the widespread argillaceous platforms on the left bank of the Yellow River is very high,the platforms are a kind of specific diluvium-mud flow fans formed in semiarid high altitude region;（ 2） there are two main development stages of the the Erlian mud flow fans： the early stage formed before 16 ka B. P.,and the second one began to accumulate from 8 ka B. P.. Both of the two stages of mud flow fans evolution were affected by climate factors,suggesting that there were cold-wet climate and plenty of rainfall at the NE Tibetan Plateau in the Last Glacial Maximum（ LGM）. 3） In the Erlian village region,the relationship of the mud flow fans accumulation and the Yellow River erosion can be divided into 3 stages： 18-16 ka B. P. is the early stage mud flow fans accumulation period,16-8 ka B. P. is the erosion period,and 8ka B. P. to present is the later stage mud flow fans accumulation period. The Yellow River course was pushed southwards for 1. 25 km in the last 8000 a.