The hydrothermal system of REE-mineralization in the barra do itapirapua carbonatite, southern Brazil: an isotopic and fluid inclusion study

摘要

The Barra do Itapirapua carbonatite belongs to a Cretaceous province related to the opening of the South Atlantic, and is emplaced in a Proterozoic granite. The carbonatite is mainly composed of plutonic magnesio- and ferrocarbonatite and is minealizing host of a REE mineralization related to late- to post-mag-matic hydrothermal processes.