Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Muscovite from
Fujigatani mine, Iwakuni City, Yamaguchi Prefecture, Japan


Locality type:Mine
Classification
Species:Muscovite
Formula:KAl2(AlSi3O10)(OH)2
Age information
Maximum recorded age:94.6 ± 2.8 Ma
Minimum recorded age:92.1 ± 3.7 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
194.6 ± 2.8 MaLate/Upper Cretaceous - K-Ar
292.1 ± 3.7 MaLate/Upper Cretaceous - K-Ar
Sample references:
1 -
Shibata K, Ishihara S (1974): K-Ar ages of the major tungsten and molybdenum deposits in Japan. Economic Geology 69(8) 1207-1214.
2 -
Shibata K, Ishihara S (1974): K-Ar ages of the major tungsten and molybdenum deposits in Japan. Economic Geology 69(8) 1207-1214.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Muscovite data
Locality Data:Click here to view Fujigatani mine, Iwakuni City, Yamaguchi Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:575511
Long-form Identifier:1:3:575511:0
GUID (UUID V4):0
Nearest other occurrences of Muscovite
8.1km (5.0 miles) ⓘKuga mine (Kuka mine), Iwakuni City, Yamaguchi Prefecture, Japan
13.6km (8.5 miles) ⓘKawayama mine, Iwakuni City, Yamaguchi Prefecture, Japan
61.8km (38.4 miles) ⓘHinomaru-Nako mine (Hinomaru-Nago mine), Abu town, Abu District, Yamaguchi Prefecture, Japan
77.8km (48.3 miles) ⓘKamisugai mine, Ouzu City, Ehime Prefecture, Japan
80.3km (49.9 miles) ⓘMt Takanawa (Takanawa-yama), Matsuyama City, Ehime Prefecture, Japan
87.1km (54.1 miles) ⓘBajo Mine, Yamaga, Hayami District, Oita Prefecture, Japan
References
Econ Geol (1980) 75:1066-1082
 
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