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选取的21个湖相沉积物样品分别采自纳木错湖西岸塔吉古日(剖面NamCo1)和纳木错湖东北岸的干玛弄附近(剖面NamCo2)。按照其发生特征分别将剖面从顶部到底部划分为12个和9个层次,通过分析各个层次沉积物的粒径分布特征、质地组成特点、总有机碳(TOC)、总无机碳(TIC)、总碳(TC)的百分含量、酸度值(pH)、电导率(EC)、含水量等若干环境指示因子。结果显示:无论在比较两个剖面的发生特征,还是环境指示因子特征,剖面NamCo1发育程度较剖面NamCo2更加发育;通过对测年数据结果分析,两个剖面均形成于晚更新世,并且通过比较各自剖面在垂直方向上的各项环境指示因子的变化趋势,可知纳木错湖流域在晚更新世(约40kaBP)阶段发生过3次相对明显的冷暖交替过程.
Twenty-one samples of lacustrine sediments were collected from the vicinity of Namgul (section NamCo1) on the west bank of Nam Co Lake and near Namgam (section NamCo2) on the northeast bank of Nam Co Lake. According to their characteristics, the profiles were divided into 12 levels and 9 levels from the top to the bottom respectively. By analyzing the characteristics of grain size distribution, texture composition, total organic carbon (TOC), total inorganic carbon (TIC) The total carbon (TC) percentage, acidity (pH), conductivity (EC), water content and some other environmental indicators. The results showed that the development of NamCo1 was more developed than that of NamCo2, no matter in comparison with the characteristics of the two profiles or the characteristics of environmental indicator. Both profiles were formed in Late Pleistocene through the analysis of the dating data. In the vertical section of each section, the trend of each environmental indicator shows that there are three relatively obvious alternation processes during the Late Pleistocene (about 40ka BP) in the Nam Co Lake Basin.