新疆喀纳斯景区土壤剖面磁学特征研究

Magnetic Characteristics of Soil Profile in Kanas Scenic Spot of Xinjiang

文章以新疆喀纳斯景区为研究区,采集4条深度为100 cm土壤垂直剖面,进行了土壤磁学特征分析。结果表明:研究区土壤磁性矿物含量整体较低,低矫顽力亚铁磁性矿物主导了样品的磁学特征,并含有少量不完整反铁磁性矿物,土壤磁性颗粒以多畴和稳定单畴粗颗粒为主;土壤磁性特征垂向变化为先增加后减少继而继续增加的趋势,表土层中存在较少的细黏滞性超顺磁性(SP)颗粒,随深度的增加,SP颗粒逐渐减少;景区土壤表土层反映了自然成土因素和人为因素2种来源的磁性特征,底土层磁性增强反映出基岩母质对土壤磁性的贡献。

Taking Kanas scenic spot in Xinjiang as the research area,four soil vertical sections with a depth of 100 cm were collected and the soil magnetic characteristics were analyzed.The results show that the soil magnetic mineral content in the study area is low overall.Low coercivity ferrimagnetic mineral dominates the magnetic characteristics of the sample,and contains a small amount of incomplete antiferromagnetic minerals.The soil magnetic particles are multidomain(MD)and stable single domain(SSD)coarse particles are dominant.The vertical change of soil magnetic characteristics is firstly increase and then decrease and then continue to increase.There are few fine viscous SP particles in the topsoil.With the increase of depth,SP particles are gradually reduced.The soil topsoil in the scenic spot reflects the magnetic characteristics of both natural and human factors.The magnetic enhancement of the subsoil reflects the contribution of the bedrock parent material to soil magnetics.