According to REE geochemistry of cassiterite sampled in various kinds of ores and magmatic bodies related with mineraliza-tion and country rock. the REE combining models,the total content and the varying pattern and reason of characteristic values incassiterite in each metallogenic stage are approached。Ore-forming materials and REE possess multi-sources,RE partitioningmodel of magmatic rock shows a differant origin compared to that of country rock.
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