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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Biotite from
Muji Mine (Mujicun Mine), Futuyu-Mujicun ore field, Laiyuan County, Baoding, Hebei, 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 Muji Mine (Mujicun Mine), Futuyu-Mujicun ore field, Laiyuan County, Baoding, Hebei, China
Data Identifiers
Mindat Occurrence Record ID:797523
Long-form Identifier:1:3:797523:3
GUID (UUID V4):0
Nearest other occurrences of Biotite
15.1km (9.4 miles) ⓘZhijiazhuang Mine, Laiyuan County, Baoding, Hebei, China
20.4km (12.7 miles) ⓘYuanfang Formation, Yi County, Baoding, Hebei, China
25.0km (15.5 miles) ⓘDawan Zn-(Mo) deposit, Laiyuan County, Baoding, Hebei, China
31.3km (19.5 miles) ⓘAntuoling Mo deposit, Laishui County, Baoding, Hebei, China
35.3km (21.9 miles) ⓘDiaoquan Cu-Ag deposit, Lingqiu County, Datong, Shanxi, China
51.4km (31.9 miles) ⓘBaishitai Au-Ag deposit, Quyang County, Baoding, Hebei, China
98.7km (61.3 miles) ⓘXishimen-Lijiazhuang Mine, Lingshou Co., Shijiazhuang, Hebei, China
99.2km (61.6 miles) ⓘMapeng pluton, Fuping County, Baoding, Hebei, China
References
Guoxi Ma, Zhikuan Chen, Lijing Chen, Xiaofeng Ma, Jinhu Ma, Yunsheng Ti, and Youfeng Dou (2010): Mineral Deposits 29(6), 1101-1111
Yang, Fan, , , Mao, Jing-wen, Ren, Wei-dong, Tu, Jia-run, Jepson, Gilby, Meng, Si-yuan, Wang, Zhi-min, , , , , et al. (2024) <i>In situ</i> U-Pb dating and trace elements of magmatic rutile from Mujicun Cu-Mo deposit, North China Craton: Insights into porphyry mineralization. China Geology, 7 (4). doi:10.31035/cg2023038
Yang, Fan; Mao, Jingwen; Jepson, Gilby; Yang, Fuquan; Bagas, Leon; Li, Yingjie; Qin, Zhenyu (2026) Multi-stage exhumation and preservation of the Mujicun porphyry Cu-Mo deposit, North China: A geo-thermochronological perspective. Geoscience Frontiers, 17 (1). doi:10.1016/j.gsf.2025.102184
 
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