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Table 1. Principal minerals of the Bayan Obo ore deposit.

[REE's, rare earth elements]

Mineral category

Principal minerals

Host rock minerals

ferroan dolomite

 

Sr- and Mn-calcite

 

quartz

 

illite

 

biotite

 

apatite

 

albite

REE ore minerals

monazite, (Ce,La,Nd)PO4

 

bastnaesite, (Ce,La,Nd)(CO3)F

 

huanghoite, Ba(Ce,La,Nd)(CO3)2F

 

parisite, (Ce,La,Nd)2Ca(CO3)3F2

 

cebaite, Ba3Ce2(CO3)5F2

Nb (+-REE's) minerals

columbite, FeNb2O6

 

aeschynite, (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6

 

fergusonite, YNbO4

 

fersmite, (Ca,Ce,Na)(Nb,Ti)2(O,OH,F)6

 

pyrochlore, (Ca,Na)2Nb2O6(OH,F)

 

Nb-rutile

Fe ore minerals

magnetite

 

hematite

 

martite

 

goethite

 

ilmenite

Other carbonate minerals

benstonite, (Ca,Sr)6Ba6Mg(CO3)13

 

norsethite, BaMg(CO3)2

 

barytocalcite, BaCa(CO3)2

 

strontianite, SrCO3

Common gangue and other minerals

fluorite

 

barite

 

aegirine

 

magnesio-arfvedsonite

 

magnesio-riebeckite

 

apatite

 

phlogopite

 

microcline

 

albite

 

bafertisite, Ba(Fe,Mn)2TiSi2O7(O,OH)2

 

cerianite, (Ce,Th)O2

Sulfide gangue minerals

pyrite

 

pyrrhotite

 

sphalerite

 

galena

 

chalcopyrite

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