Araxa
Araxa (Barreiro)
Carbonatite with residual enrichment rare earth element deposit in Minas Gerais, Brazil
Deposit type: Carbonatite with residual enrichment
REE minerals: monazite, gorceixite, goyazite, bariopyrochlore, ancylite, ceriopyrochlore
Ore minerals: apatite, bariopyrochlore, barite, magnetite, calcite, gorceixite, ilmenite, hematite, gibbsite, böhmite, pandaite, pyrochlore, vermiculite, isokite, pyrite
Gangue minerals: dolomite, arfvedsonite, aegirine-augite, goethite, limonite, kaolinite, quartz
Host rock types: beforsite, glimmerite, sovite, some pyroxenite
Average grade:
Status: Nb-P producer; REE-Ba occurrence
Company: CBMM
Resource estimates: >450 Mt Nb ore @ 2.5% Nb2O5, 4.4% REO + 0.8 Mt laterite ore @ 13.5% REO, 2% Nb2O5, 0.05% U3O8 (1984)
0.546 Mt @ 10-11% REO (1982)
462 Mt @ 0.033% REO
References
https://en.wikipedia.org
http://mrdata.usgs.gov/ree/show-ree.php?rec_id=110
@ Ph.D. Natalia Petrovskaya
June, 2016
nataliapetrovsky@gmail.com