Two-stage correlation between pH and REE concentration and pattern in rivers

摘要

Due to the unique chemicao coherence and slight systematic difference properties, the REEs are extensively used as tracers fro origin and evloution of the earth and its geology compositions (involved natural waters). Soluble REE concentration in rivers is very low (10~(-12)), and has a typical heavy REE enriched pattern relative to the North American Shale Composite (NASC) than those of upper crust, suspended materials and sediments. Negative Ce anomalies wre widely observed in most of rivres.