西北干旱区爬坡沙丘顶部表层沉积物特征

赵华刚, 王晓旭, 褚佳琦, 高雅婷, 袁文杰, 严平

Characteristics of surface sediments at the tops of climbing dunes in northwestern arid region of China

Huagang Zhao, Xiaoxu Wang, Jiaqi Chu, Yating Gao, Wenjie Yuan, Ping Yan

表2 沙丘表层沉积物的常量氧化物含量（%）

Table 2 Constant oxide content of dune surface sediments （%）

沙丘编号 参数 SiO2 Al2O3 Fe2O3 MgO CaO Na2O K2O YBL-1 变化范围 80.14~87.18 6.52~9.18 1.26~2.92 0.65~1.40 0.80~2.07 1.82~2.42 1.66~2.17 均值 83.53 8.04 2.08 0.99 1.30 2.11 1.94 YBL-2 变化范围 82.06~87.12 6.43~8.76 1.30~2.46 0.61~1.20 0.80~1.35 1.79~2.14 1.62~2.09 均值 85.46 7.25 1.65 0.82 1.03 1.93 1.85 MZTG-1 变化范围 65.55~74.87 10.17~11.40 2.32~3.78 1.56~2.78 5.34~11.74 2.66~3.11 2.25~2.68 均值 70.20 10.83 3.05 2.07 8.55 2.82 2.48 黄土 均值 66.40 14.20 4.81 2.29 1.02 1.66 3.01 古土壤 均值 65.18 14.79 5.12 2.21 0.83 1.41 3.15 UCC 均值 66.00 15.20 5.00 2.20 4.20 3.90 3.40 PAAS 均值 62.80 18.90 7.22 2.20 1.30 1.20 3.70