珠江三角洲两工业区土壤环境磁学初步研究

A PRELIMINARY STUDY ON ENVIRONMENTAL MAGNETISM OF SOILS FROM TWO INDUSTRIAL AREAS IN ZHUJIANG RIVER DELTA

对珠江三角洲东莞石龙、顺德容奇—桂洲两工业区的土壤磁性进行初步研究，获得两地区6个柱样及48个表层样品的磁化率（X）和天然剩余磁化强度（NRM）的结果，石龙地区的X，NRM的垂直变化平均值分别为10．86×10－6SI和6．73×10-6A·m－1，顺德容桂地区X，NRM的垂直变化平均值分别为96．84×10－6SI和31．49×10－6A·m－1，表层样容桂地区X和NRM值大于石龙地区，表明两地区土壤的磁载体存在明显的差异，磁记录大致能反映现代环境的信息。

The magnetic susceptibility (X) and natural remnant magnetization (NRM) of 6 core samples and 48 surface soil samples from the Shilong and the RongqiGtuzhou areas, the two industrial areas of the Zhujiang River Delta, are determined. The average X and NRM of the cores from the Shilong area are 10.86×10-6 SI and 6.73 × 10-6A·m-1 respectively, and those from the Rongqi-Guizhou area are 96.84 ×10-6 SI and 31.49 × 10-A·m-1 respectively, i. e. the X and NRM of the core samples in the Rongqi-Guizhou area are higher than those from the Shilong area,so are those of the surface samples. The results indicate that the magnetic media of soils are obviously different between above two areas. The magnetic property recorded in soils can roughly reflect the modem environment.