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对新疆巴里坤鸣沙山风成沉积物粒度进行了分析,并对其特征进行了探讨。结果表明:巴里坤鸣沙山风成沉积物以中沙为主,分选较好,偏度值接近0,峰态很窄。概率累积曲线揭示风成沉积物碎屑颗粒的主要搬运方式为跃移,所占比例为40%~95%。沿沙脊-山坡-山脚的方向,平均粒径逐渐变大,分选性变差,蠕移组分含量增加。粒度具有分形特征,分维值平均为0.94,与常见碎屑物质相比,处于较低的水平。分维值与标准偏差显著相关,说明分选程度会对分形特征产生影响。
The sediment particle size of Mingsha Mountain in Balikuen of Xinjiang Autonomous Region was analyzed, and its characteristics were discussed. The results show that the sediments of Mingsha Mountain in Barrikun are mainly in the middle and sand, the sorting is better, the skewness value is close to 0 and the kurtosis is very narrow. The probability cumulative curve reveals that the main transport mode of the detrital sediment particles is leapfrogging, accounting for 40% -95%. Along the ridge - hillside - the foot of the mountain, the average particle size gradually increased, sorting worse, creep content increased. The particle size has the fractal character, the average fractal dimension is 0.94, which is lower than the common debris. The fractal dimension value is significantly related to the standard deviation, indicating that the degree of sorting will have an impact on the fractal characteristics.