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Biotite from
Main pit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China


Locality type:Pit
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Main pit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
Data Identifiers
Mindat Occurrence Record ID:458273
Long-form Identifier:1:3:458273:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
0.4km (0.3 miles) ⓘBayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
1.4km (0.9 miles) ⓘH9 litho-unit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
1.4km (0.9 miles) ⓘEast Mine, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
4.2km (2.6 miles) ⓘSain Usu Au deposit (Saiwusu Au deposit), Darhan Muminggan United Banner (Da'erhan Maoming'an Lianheqi; Damaoqi), Baotou City, Inner Mongolia, China
4.5km (2.8 miles) ⓘEastern contact zone, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
4.7km (2.9 miles) ⓘAbandoned pit, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
5.3km (3.3 miles) ⓘHuanghuatan Cu-Ni-Pt-Pd deposit, Wuchuan County, Hohhot City (Huhehaote Prefecture), Inner Mongolia, China
7.8km (4.8 miles) ⓘWest Mine, Bayan Obo deposit, Bayan Obo mining district, Baotou City, Inner Mongolia, China
25.3km (15.7 miles) ⓘXiaonanshan Cu-Ni-(Pt-Pd) deposit, Wuchuan County, Hohhot City (Huhehaote Prefecture), Inner Mongolia, China
53.5km (33.2 miles) ⓘLaoyanghao Au deposit, Guyang County, Baotou City, Inner Mongolia, China
References
Smith, M.P. (2007): Lithos 93(1/2), 126-148.
Sun, Qing; Li, Xian-Hua (2026) Niobium and heavy rare earth element mineralization in the Bayan Obo deposit, China: Insights from aeschynite mineralogy, geochemistry, and geochronology. Geoscience Frontiers, 17 (6). p.102405. doi:10.1016/j.gsf.2026.102405
 
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