Locality type: | Island |
Classification |
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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 |
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Maximum recorded age: | 136 ± 7 Ma |
Minimum recorded age: | 136 ± 7 Ma |
Sample ages: | |
Sample references: | |
Confirmation |
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Validity: | Believed Valid |
Data |
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Mineral Data: | Click here to view Biotite data |
Locality Data: | Click here to view Nchisi Island (Chilwa Island; Shirwa Island), Zomba, Southern Region, Malawi |
Data Identifiers |
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Mindat Occurrence Record ID: | 715034 |
Long-form Identifier: | 1:3:715034:0 |
GUID (UUID V4): | 6082a04a-5134-4ffa-aa32-39473109ad5b |
Nearest other occurrences of Biotite |
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11.9km (7.4 miles) | ⓘMpyupyu Hill, Zomba, Southern Region, Malawi |
31.9km (19.8 miles) | ⓘTundulu Complex, Phalombe, Southern Region, Malawi |
32.2km (20.0 miles) | ⓘMongolowe-Chaone-Chikala Complexes, Machinga, Southern Region, Malawi |
33.8km (21.0 miles) | ⓘNkalonje Hills, Phalombe, Southern Region, Malawi |
43.1km (26.8 miles) | ⓘMachemba Mountain, Phalombe, Southern Region, Malawi |
45.2km (28.1 miles) | ⓘChinduzi Intrusion, Mongolowe-Chaone-Chikala Complexes, Machinga, Southern Region, Malawi |
47.4km (29.4 miles) | ⓘSongwe Hill REE Project (Songwe Hill carbonatite), Phalombe, Southern Region, Malawi |
47.6km (29.6 miles) | ⓘJunguni Hill, Machinga, Southern Region, Malawi |
53.1km (33.0 miles) | ⓘMichese Intrusion, Phalombe, Southern Region, Malawi |
68.8km (42.8 miles) | ⓘMulanje Massif (Mlange Massif), Mulanje, Southern Region, Malawi |
References |
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Eby, G.N., Roden-Tice, M., Kreuger, H.L., Ewing, W., Faxon, E.H., and Woolley, A.R. (1995): Geochronology and cooling history of the northern part of the Chilwa alkaline province, Malawi. Journal Afr. Earth Sci. 20, 275-288. doi.org/10.1016/0899-5362(95)00054-W |