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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
Amparo deposit, Zas, A Coruña, Galicia, Spain


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 Amparo deposit, Zas, A Coruña, Galicia, Spain
Data Identifiers
Mindat Occurrence Record ID:1651387
Long-form Identifier:1:3:1651387:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
18.9km (11.7 miles) ⓘBaiñas-Mazaricos gneisses, Dumbría, A Coruña, Galicia, Spain
45.9km (28.5 miles) ⓘSan Finx Mines, Vilacova, Lousame, A Coruña, Galicia, Spain
58.8km (36.5 miles) ⓘArienteiro deposit, Touro Copper Project, Touro, A Coruña, Galicia, Spain
59.0km (36.6 miles) ⓘTouro Copper Project, Touro, A Coruña, Galicia, Spain
75.6km (46.9 miles) ⓘPanceiros pegmatite, Campo Lameiro, Pontevedra, Galicia, Spain
81.3km (50.5 miles) ⓘForcarei Norte pegmatite field, Silleda, Pontevedra, Galicia, Spain
88.0km (54.7 miles) ⓘFontao mines, Silleda, Pontevedra, Galicia, Spain
97.3km (60.4 miles) ⓘMount Ermelo, Moaña, Pontevedra, Galicia, Spain
References
Borrajo, Iñigo; Tornos, Fernando; Stein, Holly; Hanchar, John M. (2024) Geochronology and decoupling controls of Sn-(Ta-Li) and W-(Sn) mineralization in the Iberian Variscan Massif, Spain and Portugal. Ore Geology Reviews, 173. 106253 doi:10.1016/j.oregeorev.2024.106253
 
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