Ultrastructure of a Columbite-Tantalite Mineral from the Zhaojinggou Ta-Nb Deposit in the North China Craton: Direct Evidence of the Formation Mechanism of the Columbite-Group Minerals

<div>SEM images of the columbite-tantalite mineral. The yellow and black lines indicate the positions of the FIB section and SEM line analysis. Those results are illustrated in Figures <a href="../fig6/">6</a> and <a href="../fig4/">4</a>, respectively.</div>

Geofluids

fig3

Figure 3

Figure 3: Ultrastructure of a Columbite-Tantalite Mineral from the Zhaojinggou Ta-Nb Deposit in the North China Craton: Direct Evidence of the Formation Mechanism of the Columbite-Group Minerals 

Figure 3 | Ultrastructure of a Columbite-Tantalite Mineral from the Zhaojinggou Ta-Nb Deposit in the North China Craton: Direct Evidence of the Formation Mechanism of the Columbite-Group Minerals 