Diamond-bearing Lower to Middle Proterozoic conglomerates, occurring along two roughly N-S trending lineaments west and southeast of Diamantina. The western lineament extends for over 60 km between Quartéis and São João da Chapada in the north and Datas in the south; the eastern lineament comprises the workings around Extração and Milho Verde.
References
- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 831, 833.
- Weiner, K-L. (1986): Ein besonderer Quarzkristall aus Brasilien. Lapis 11(10), 30-33.
- Fleischer, R. (1998): A rift model for the sedimentary diamond deposits of Brazil. Mineralium Deposita 33, 238-254.
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