摘要
采用环境磁学研究方法研究了昆明市松华坝水源区表土的磁学特征,结果表明,松华坝上游地区表土未受或很少受到污染,土壤磁化率偏低,土壤中的主要载磁矿物为磁铁矿、磁赤铁矿,另外还含有少量弱磁性的磁黄铁矿和针铁矿。松华坝下游坝区土壤受到了一定程度的污染,污染表土的磁学特征表现为:高磁化率,磁化率与频率磁化率呈现较强的负相关,污染土壤中的主要载磁矿物为强磁性的磁铁矿。松华坝下游土壤污染主要局限于距水面2m的范围之内,污染物主要来源于农业面源污染。
Songhuaba Reservoir located northeastern of Kunming, it＇s the upstream of Panlongjiang River, and it＇s the major water supply source of Kunming and Dianchi Lake. The magnetic characteristics of the topsoil in this area were studied using environmental magnetism methods. The results showed that, the topsoil in the upstream area was not polluted or little polluted, their magnetic susceptibility is low, and the main magnetic minerals were magnetite and hematite, there were also a small amount of weak magnetic pyrrhotite and goethite. The topsoil in the downstream area was polluted by a certain degree. The magnetic characteristics of the polluted topsoil were： high magnetic susceptibility, the magnetic susceptibility and frequency magnetic susceptibility showed strong negative correlation, the main magnetic minerals was strong magnetic minerals as magnetite. The topsoil pollution was limited in the area 2 meters beyond the water surface and the pollutants mainly came from the agricultural surface pollution.
出处
《云南地理环境研究》
2008年第3期33-37,共5页
Yunnan Geographic Environment Research
基金
云南师范大学校级青年基金"昆明市松华坝水源区污染土壤环境磁学研究"(0130053215004)
关键词
表土
磁化率
环境磁学
松华坝水源区
topsoil
magnetic susceptibility
environmental magnetism
Songhuaba Reservoir
