Abstract: The types of plant communities in Mengentaoligai mine area are disscussed. Arenaria juncea, densely grown in the phytocommunities of the mineralized zone, is found closely related to the presence of Pb and Zn mineral deposits. Analytical results of seven element contents (in ash) for 34 species (or part of plant) show that: levels of element contents in sequence in. the plants are Fe>Mn > Zn > Pb > Cu > Ni>Co; variable ranges of element contents in the plants are Pb, Zn>Fe,Mn> Cu> Co > Ni; and variable ranges of Pb, Zn contents in the same species at different sites are respectively larger than that among species. For example, Pb and Zn contents of Arenaria juncea, l145ppm and 3087ppm respectively, are the highest; the difference among Pb contents of Ulmus macrocarpa, Arenaria ?uncea and PotentiUa chinensis at different sites are more than 10 folds. The difference of Co and Ni contents in the species is less than two to one- Striking correlation is found between elements in plants and in soils, such as the Pb and Zn contents between leaves and twigs of Ulmus macrocarpa, twigs of Prunus sibirica, Artemisia halodendron and soils (lrl≤α 0.05 or≤α 0.01). It is found that Pb and Zn phytogeochemical anomalies, correlate closely with Pb and Zn mining deposits. In addition, analysis of principal component was conducted among seven elements contents of 14 species (or part of plant) in the mineralized zone and 12 species in the unmineralized zone.

Key words: Ag, Pb and Zn mine area, Phytocommunity, Element content, Phytoge-Ochemistry