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Biotite from
Dongqiyishan Mine, Dongqiyishan polymetallic ore field, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China


Locality type:Mine
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 Dongqiyishan Mine, Dongqiyishan polymetallic ore field, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
Data Identifiers
Mindat Occurrence Record ID:731137
Long-form Identifier:1:3:731137:6
GUID (UUID V4):0
Nearest other occurrences of Biotite
34.0km (21.1 miles) ⓘNo. 96–97 exploration target, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
34.4km (21.4 miles) ⓘLiushashan Mo-Au deposit, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
37.2km (23.1 miles) ⓘSuosuojing Ag-Pb deposit, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
37.3km (23.2 miles) ⓘLaodonggou Mine, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
37.5km (23.3 miles) ⓘYingzuihongshan W deposit, Pantuoshan-Yingzuihongshan tungsten belt, Ejin Banner (Ejina Co.), Alxa League (Alashan Prefecture), Inner Mongolia, China
40.1km (24.9 miles) ⓘWudaomingshui, Jinta Co., Jiuquan, Gansu, China
References
Fengjun Nie, Sihong Jiang, Yan Liu, and Yuanxian Lin (2002): Mineral Deposits 21(1), 10-15
Li, Haijun; Wu, Lei; Gao, Shuqi; Zong, Feichao; Zhang, Xiangxiang; Liu, Chaoyun (2026) Genesis of the Dongqiyishan Porphyry W-Polymetallic Deposit, Inner Mongolia: Constraints from Molybdenite Re-Os Geochronology, Fluid Inclusions, and H-O-S Isotopes. Minerals, 16 (4). 377 doi:10.3390/min16040377
 
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