BIOGEOCHEMICAL EXPLORATION IN DAXINGANLING FOREST COVERED AREA

Based on the previous study on biogeochemical exploration,combining the geology of non-ferrous and precious metallic mineralization of the area,the bark from lower trunk of betula is selected as the sampling media of biogeochemical survey. The contents of Au,Ag,Cu,Pb and Zn elements are tested The results show that:1)biogeochemical survey is more effective than soil geochemical survey;2)the bark of betula is characterized by easily picking and ashing; and 3)the biogeochemical result coincides well to the known Au-Pb-Zn mineralization alteration-alteration belts. Biogeochemical survey in this area is suitable and reliable. It is worth to be spread.