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Biotite from
Guocheng Au deposit (Tudui-Shawang Au deposit), Haiyang City, Yantai, Shandong, 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 Guocheng Au deposit (Tudui-Shawang Au deposit), Haiyang City, Yantai, Shandong, China
Data Identifiers
Mindat Occurrence Record ID:868011
Long-form Identifier:1:3:868011:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
4.5km (2.8 miles) ⓘLiaoshang Au deposit, Mouping District, Yantai, Shandong, China
5.2km (3.2 miles) ⓘXilaokou Au deposit, Rushan Co., Weihai, Shandong, China
10.8km (6.7 miles) ⓘPengjiakuang Mine, Rushan Co., Weihai, Shandong, China
14.7km (9.1 miles) ⓘShangjiazhuang Mo deposit, Qixia City, Yantai, Shandong, China
22.2km (13.8 miles) ⓘSongjiagou Au deposit, Muping-Rushan metallogenic belt, Rushan Co., Weihai, Shandong, China
30.2km (18.8 miles) ⓘTangjiagou Au deposit, Tangjiagou ore field, Rushan Co., Weihai, Shandong, China
36.8km (22.9 miles) ⓘYinggezhuang Au deposit, Muping-Rushan metallogenic belt, Rushan Co., Weihai, Shandong, China
37.7km (23.4 miles) ⓘKongxintou Cu–Mo Mine, Mouping District, Yantai, Shandong, China
40.0km (24.8 miles) ⓘJinniushan Au deposit, Jinniushan ore field, Mouping District, Yantai, Shandong, China
41.1km (25.5 miles) ⓘQixia (Chihsia) lava flows, Laiyang, Yantai, Shandong, China
References
Junbo Lu, Lianyuan Qin, Meng Zhang, and Yuanxian Yue (2012): Gold Science and Technology 20(5), 52-57
Sun, Ning-Han; Cui, Tao; Zhou, Rong-Zhi; Li, Yu-Ying; Fu, Qiang; Qin, Lian-Yuan; Deng, Qian-Jie; Wei, Xu-Feng (2025) Genesis of High-Grade Gold Mineralization at the Guocheng Deposit, Jiaodong Peninsula: Constraints from Magnetite Geochemistry. Minerals, 15 (12). doi:10.3390/min15121267
Zhang, Guoqing; Wang, Gongwen; Peng, Qingming; Liu, Kun; Chen, Yuchang; Cao, Yi (2026) Drill-Core SWIR-Based 3D Alteration Modeling and Machine Learning for Gold Prospectivity Prediction at the Tudui–Shawang Gold Deposit, Jiaodong Peninsula. Minerals, 16 (8). doi:10.3390/min16080855
 
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