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《Earth and Environment》 2008-01
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GEOCHEMICAL AND BIOGEOCHEMICAL CHARACTERISTICS OF TRACE ELEMENTS IN THE SOIL-PLANT SYSTEM IN THE HETAI GOLDFIELD,GUANGDONG PROVINCE

MIAO Li1, 2, XU Rui-song2, ZHU Zhao-yu1,WANG Jie1,2, CAI Rui1,2, CHEN Yu1, 2(1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. Graduate School of the Chinese Academy of Sciences,Beijing 100039,China)  
The concentrations of trace elements in the soil-plant system taken from the Hetai goldfield in Guangdong Province were determined by the ICP-MS method and their geochemical characteristics were studied. Results showed that the trace elements in soil profiles have been transported and accumulated during the mineral formation and supergenic geochemical process. In the different layers of soils, the concentrations of trace elements in layer A and layer B are higher than in layer C. The concentrations of Au and Au-associated elements such As, Hg, Cu, Pb in the soil in the mineralized area are much higher than those in the surrounding regions. The distributions of trace elements in plants are influenced by soils and also have their individual biogeochemical characteristics. And different plant species display different tolerant mechanisms to the Au mineral surrounding. The biological absorption coefficients (BAC) and the biological transfer coefficients (BTC) indicate the differences in absorbency of trace elements in plants and their transportation in different plant organs.
【Fund】: 中科院创新项目(KZCX3-SW-152);; 国家基金重点项目(40331009、4067212);; 广东省自然科学基金(06025464、04201163)
【CateGory Index】: P593
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