Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Biotite from
Duobuza Cu-(Au) deposit (Dobuzha Cu-(Au) deposit), Duolong ore field, Gêrzê Co., Ngari, Tibet, China


Locality type:Deposit
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 Duobuza Cu-(Au) deposit (Dobuzha Cu-(Au) deposit), Duolong ore field, Gêrzê Co., Ngari, Tibet, China
Data Identifiers
Mindat Occurrence Record ID:725257
Long-form Identifier:1:3:725257:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
9.5km (5.9 miles) ⓘBolong Cu-Au deposit, Duolong ore field, Gêrzê Co., Ngari, Tibet, China
10.9km (6.8 miles) ⓘSouthern Tiegelong deposit, Duolong ore field, Gêrzê Co., Ngari, Tibet, China
12.9km (8.0 miles) ⓘTiegelongnan porphyry-epithermal Cu (Au) deposit, Duolong ore field, Gêrzê Co., Ngari, Tibet, China
13.6km (8.5 miles) ⓘNaruo deposit, Duolong ore field, Gêrzê Co., Ngari, Tibet, China
47.0km (29.2 miles) ⓘQingcaoshan, Gêrzê Co., Ngari, Tibet, China
References
Xiaoming Qu and Hongbo Xin (2006): Geological Bulletin of China 25(7), 792-799
Guangming Li, Jinxiang Li, Kezhang Qin, Tianping Zhang, and Bo Xiao (2006): Mineral Deposits 25(suppl.), 411-414
Xiangping Zhu, Hua'an Chen, Dongfang Ma, Hanxiao Huang, Guangming Li, Chaoqiang Liu, and Lujie Wei (2012): Geoscience 26(4), 656-662
Yang, Huanhuan; Tang, Juxing; Song, Yang; Wang, Qin; Liu, Zhibo (2022) The preservation mechanism of the Duolong ore district in northwest Tibet: Evidence from the low temperature thermochronological study. Ore Geology Reviews, 143. p.104766. doi:10.1016/j.oregeorev.2022.104766
Chen, Qi, Cai, Dayu, Xia, Jisheng, Zeng, Min, Yang, Haiying, Zhang, Ruisi, He, Yang, Zhang, Xiaoxiao, Chen, Yi, Xu, Xinhui, et al. (2025) Remote sensing identification of hydrothermal alteration minerals in the Duobuza porphyry copper mining area in Tibet using WorldView-3 and GF-5 data: The impact of spatial and spectral resolution. Ore Geology Reviews, 180. 106573 doi:10.1016/j.oregeorev.2025.106573
Zhang, Qi; Yang, Huanhuan; Li, She; Wang, Qin; Dong, Yujie; Li, Hongwei; Yang, Chao; Gan, Changyun; Zhang, Rongkun; Fu, Xuelian; et al. (2026) Geochemistry of Metal Sulfides from the Duolong Porphyry Cu-Au Deposit, Tibet: Implications for the Mineralization Process. Minerals, 16 (5). doi:10.3390/min16050478
Fu, Xuelian; Gan, Changyun; Li, She; Wang, Qin; Dong, Yujie; Xia, Hongwei; Zhang, Qi; Zhang, Rongkun; Liang, Xinjuan (2026) Mineralogical Characteristics of Magnetite in the Duobuza Porphyry Copper (Gold) Deposit and Their Geological Implications. Minerals, 16 (3). doi:10.3390/min16030288
Fu, Xuelian; Yang, Chao; Yang, Huanhuan; Tang, Juxing; Wang, Qin; Dong, Yujie; Zhang, Qi; Zhang, Rongkun; Liang, Xinjuan; Xin, Tang (2026) Geochemistry of magnetite and its implication to genesis and exploration of the Duolong porphyry district. Ore Geology Reviews, 197. p.107527. doi:10.1016/j.oregeorev.2026.107527
 
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