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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
Tuzla geothermal field, Ayvacık District, Çanakkale Province, Turkey


Locality type:Volcanic Field
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 Tuzla geothermal field, Ayvacık District, Çanakkale Province, Turkey
Data Identifiers
Mindat Occurrence Record ID:1885827
Long-form Identifier:1:3:1885827:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
44.0km (27.4 miles) ⓘPalamutoba prospect, Bayramiç District, Çanakkale Province, Turkey
66.0km (41.0 miles) ⓘKirazlı, Çanakkale, Çanakkale Province, Turkey
68.3km (42.4 miles) ⓘHalilaga prospect, Çan District, Çanakkale Province, Turkey
74.2km (46.1 miles) ⓘHamamtepe silica site, Çan District, Çanakkale Province, Turkey
76.1km (47.3 miles) ⓘTereoba Cu-Mo-Au deposit, Havran District, Balikesir Province, Turkey
84.8km (52.7 miles) ⓘHalılar Cu-Pb (±Zn) mineralization, Havran District, Balikesir Province, Turkey
92.4km (57.4 miles) ⓘFakos Cu-Au deposit, Limnos, Lemnos, North Aegean, Greece
94.9km (58.9 miles) ⓘKestanelik deposit, Lapseki District, Çanakkale Province, Turkey
References
Kiray, Didem; Cengiz, Oya (2025) Petrography, Geochemistry, and Magmatic Processes of Oligocene-Miocene Tuzla Volcanics, Biga Peninsula, NW Türkiye. Minerals, 16 (1). doi:10.3390/min16010023
 
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