On the Occurrence States of the Element Nb and Ta in the Superlarge Geyuan Rare Metal Deposit in Jiangxi Province

The Geyuan Nb-Ta rare metal deposit is hosted in the underground altered granite. The features of Nb and Ta mineralization and Nb and Ta occurrences in this deposit have been studied. Both rare metals in the Geyuan deposit dominantly occur in the forms of isomorphs, independent mineral and inclusion, and the independent minerals are predominately tantaline and microlite.