The Campo Formoso stratiform intrusive complex is of Paleoproterozoic age and consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide. It hosts the most prominent chromite deposits of Brazil. At least seven chromitite layers, up to more than 10 m thick, have been discovered in the SW limb of the intrusion, and have been mined at several places.
References
- F. Zaccarini, G. Garuti and R.F. Martin (2006): Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil). Geologica Acta 4, 461-469. [http://www.geologica-acta.com/pdf/vol0404a04.pdf]
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