Spatial Distribution and Vertical Variation of Soil Cu Environmental Background Value in Guangdong

Based on GIS with Geo-statistics analyst software(Surfer 8.0),total of 261 soil depth profiles were reported to investigate the Cu spatial distribution and vertical variation in Guangdong province.Cu spatial distribution presented similar patterns and high Cu concentration mainly was located in fault,basin,and delta areas,indicating that soil Cu distribution was dependent on regional basin.Moreover,from A-to C-horizon Cu mean concentrations had an increasing tendency.Regional extensive distribution of granite and the fault mainly decided the spatial distribution of Cu concentration.Soil organic matter and clay content also,to a certain extent,affected the spatial distribution of Cu concentration.