RARE EARTH PARTITIONING OF GRANITOID WEATHERING CRUST IN SOUTHERN CHINA

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The rare earth partitionings in parent rock, weathering crust ore and exchangeable state of granitoid weathering crust of Southern China have been studied. Their partitionings have a certain inheritance from interrelated analysis of 338 exchangeable rare earth partitionings. It can be seen that the rare earth elements prior to Gd are positively interrelated, so are those later Gd. But the rare earth elements prior to Gd are negative interrelated to the elements later Gd, which is called the Gd break effect. The order of rare earth partitionings in exchangeable phase is La 2O 3>Nd 2O 3>CeO 2, possessing cerium lose effect. The light rare earth partitioning as main partitioning type occupies 71.0% and rich Eu light rare earth partitioning type (Eu 2O 3≥0.8%) occupies 40.5%. The rich cerium and rich Eu heavy rare earth partitioning types are very few, and only occupy 1.8% and 2.4% respectively.