为探究环境磁学方法在景区土壤污染监测中的可行性，以新疆5A级景区喀纳斯为研究区域，采集表层土壤样品72个，并对其进行系统的环境磁学分析。结果表明：喀纳斯景区土壤磁性矿物平均含量较高，磁学矿物主要由亚铁磁性矿物构成，并含有少量的不完全反铁磁性矿物。磁晶颗粒主要为粗颗粒多畴，同时存在较少的超顺磁颗粒。磁参数空间分布表明，磁性矿物含量参数(χ_LF、SIRM、SOFT、HIRM)在湖口旅游区表现出高值，新村、老村和旅游接待地呈现相对低值；其他参数(χ_FD%、S-ratio、SIRM/χ_LF)空间分布规律与含量磁性参数基本呈相反趋势；研究区的磁性高值点分布与景区人类活动密集区、建筑物及道路的分布具有一致性；湖口旅游区较高的磁性值主要与较强的自然成土作用有关，其他区域的磁性高值点主要受旅游活动的影响。因此，借助土壤磁学方法能够有效区分和圈定景区土壤人为污染范围，为景区土壤污染防治和旅游规划提供参考依据。

In order to explore the feasibility of environmental magnetism method in monitoring soil pollution in scenic spots, 72 samples of topsoils were collected from Kanas 5A scenic spot in Xinjiang. The results showed that the average content of soil magnetic minerals was high in Kanas scenic spot. The magnetic properties of topsoils were predominated by ferromagnetic minerals and a small amount of anti-ferromagnetic minerals. The magnetic grains were mainly coarser multidomain (MD) particles and fewer superparamagnetic particles (SP). The parameters of χ_LF, SIRM, SOFT and HIRM were higher in lake-outlet tourism area but lower in new villages, old villages and tourist reception areas, the other parameters of χ_FD%, S-ratio and SIRM/χ_LF were on the contrary. The distribution of high magnetic sites was consistent with the distribution of intensive human activity areas, buildings and roads in the scenic spot. The high magnetic value of lake-outlet tourism area was mainly related to the stronger natural soil formation, and the high magnetic sites in other regions are mainly influenced by the tourism activities. Therefore, the scope of man-made pollution could be effectively distinguished and delineated in the scenic area by soil magnetic method, and it provides a reference for the prevention and control of soil pollution and tourism planning.

P934；X53

国家自然科学基金项目(41461033)资助。