Abstract:

      The marsh wetland belongs to a special kind of condition. To choose right media proper to the multiobjective geochemical exploration in the Zhalong marsh wetland, the group of the program made method trials, and the media collected for the trials are mainly from humic soils on the marsh wetland surface or from the fluvial soils on the base. The results show that the humic soil is the best media for the multiobjective geochemical exploration in the landscape. The contents of elements contained in the samples from humic soils,such as OrgC, N, S, Se, Hg, TC, U, Br, Au,TFe₂O₃, Bi, Cr, Ag, Li, Y, Mo, Cu, Sb, etc,are more than those obtained in the samples from fluvial soils. The conclusion accords with the ecological environment characteristics;however,the fluvial substances under the humic soil are most from outside area, and couldn’t reflect the ecological environment characteristics.Finally, the humic soil on the surface is the optimal media for the multiobjective geochemical survey in the swamp area. 

Key words: marsh wetland, multiobjective geochemical exploration, method trial, Song-Nen plain