Characteristics and Formation Mechanism of Vegetation Geochemical Anomalies in the Nanpo Copper Ore Field,Xishuangbanna,Yunnan Province,China
No. Ⅰ and No. Ⅱ vegetation geochemical anomalies at line Ⅰ in the Nanpo copper ore field of Xishuangbanna, Yunnan Province, which developed at the ridge above the hidden deposit and the slope near the stream in the study cross-section, their occurrence space, material source and developmental state are subjected to different genetic types of soil geochemical anomaly control. No. Ⅰ vegetation anomaly reflects soil gas anomaly, clastic anomaly and upward hydromorphc anomaly; No. Ⅱvegetation anomaly reflects soil lateral hydromorphc anomaly and some hydrochemical anomaly. As the geochemical forms of the elements and phytoavailability in the rhizo sphere environment, and selectivity absorbing and shielding effects of plants, some elements in the vegetation anomaly have incompatibility with some corresponding elements in the soil anomalies. Pool of vegetation geochemical anomaly and all pool of geochemical anomaly have taken place in the relationship, which occur as a series of complex interface reactions in a certain time and space, environmental and power conditions lend to the migration and transformation of elements into plants, resulting in the formation of vegetation geochemical anomalies.