风成沙、海成沙、河成沙颗粒特征的对比分析

Comparative Analysis on Particle Characteristics of Aeolian Sand,Sea Sand and Fluvial Sand

通过对河成沙、海成沙、风成沙的颗粒进行筛选、称量、观察、对比,分析得出沙物质的粒径范围,同时也对沙粒的磨圆度做了分析。结果表明:风成沙为3.14%的粉沙,而河成沙为0.3%,海成沙(Ⅰ、Ⅱ)分别为0.07%和0.03%。并且,河成沙含有的粗沙和极粗沙最多,为73.35%;海成沙(Ⅰ、Ⅱ)分别为5.12%和0.15%;风成沙为15.71%。对磨圆度而言,风成沙的磨圆度最好,其中圆为26%,次圆为54%;海成沙(Ⅰ、Ⅱ)次之,其中圆分别为3%和4%;次圆为30%和29%;河成沙的磨圆度最差,圆为4%,次圆为14%。

Through screening,weighing,observing and comparing the particle of fluvial sand,sea sand and aeolian sand,the range of size of sand material was obtained and the degree of roundness of sand particle was analyzed.The results showed that the content of silt sand in aeolian sand,fluvial sand and sea sand（Ⅰ,Ⅱ） was 3.14%,0.3%,0.07% and 0.03% separately.The content of coarse sand and extremely coarse sand was 73.35% in fluvial sand,the one in sea sand（Ⅰ,Ⅱ） was 5.12% and 0.15% separately,the one in aeolian sand was 15.71%.The roundness of aeolian sand was the highest,with 26% for round,54% for secondary round.For sea sand（Ⅰ,Ⅱ）,the content of round and secondary round was 30% and 29% separately.The roundness of fluvial sand was the lowest,with 4% for round and 14% for secondary round.