Emeral deposit, associated with ductile shear zones cutting mafic and ultramafic rocks. Emeralds occur in phlogopitites and phlogopitized talc-carbonate schists. Unlike all other Brailian deposits, the Santa Terezinha deposit is not associated with pegmatites.
The mines were discovered in the 80's about 20 km N of Santa Terezinha de Goiás. Around the mines, a new city was formed, which is now the administrative center of the new Campos Verdes municipality.
References
- Gems & Gemology 20 (1984), 4-13
- Groat, L.A., Giuliani, G., Marshall, D.D., and Turner, D. (2008): Emerald deposits and occurrences: A review. Ore Geology Reviews 34, 87-112.
Mineral List
12 entries listed. 9 valid minerals.
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