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Biotite from
Kyeongju Namsan, Gyeongju City, North Gyeongsang Province, South Korea


Locality type:Intrusion
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Age information
Maximum recorded age:48.2 ± 0.7 Ma
Minimum recorded age:46.5 ± 0.9 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
148.2 ± 0.7 MaEocene - Rb-Sr
246.8 ± 0.9 to 46.5 ± 0.9 MaEocene - K-Ar
Sample references:
1 -
Lee, M. J., Lee, J. I., & Lee, M. S. (1995). Mineralogy and major element geochemistry of A-type alkali granite in the Kyeongju area, Korea. ?????, 31(6), 583-607.
2 -
Lee, M. J., Lee, J. I., & Lee, M. S. (1995). Mineralogy and major element geochemistry of A-type alkali granite in the Kyeongju area, Korea. ?????, 31(6), 583-607.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Kyeongju Namsan, Gyeongju City, North Gyeongsang Province, South Korea
Data Identifiers
Mindat Occurrence Record ID:1348185
Long-form Identifier:1:3:1348185:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
11.1km (6.9 miles) ⓘGigye-Gyeongju granite, Gyeongju City, North Gyeongsang Province, South Korea
72.8km (45.3 miles) ⓘDaljeon Intrusion, Yeongdeok County, North Gyeongsang Province, South Korea
References
Lee, M. J., Lee, J. I., & Lee, M. S. (1995). Mineralogy and major element geochemistry of A-type alkali granite in the Kyeongju area, Korea. ?????, 31(6), 583-607.
 
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