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The Córrego do Sítio Mine

Last Updated: 9th Aug 2019

By Paulo Cesar Pereira das Neves; Darcson Vieira; Daniel Atencio

The Córrego do Sítio mine is located in Fazenda São Bento (Barra Feliz), near 10 km from the town of Santa Bárbara, Minas Gerais state, Brazil (20°01’33” S; 43°30’44’’ W), at a vertical height of sea level of 732 m.
The mining complex currently consists of the Córrego do Sítio I (formerly called São Bento mine), the Córrego do Sítio II underground mines, and the João Burro open pit mine, which is one of the ventures of South African mining company AngloGold Ashanti, currently the largest gold miner in Brazil.
Stratigraphically, these terraines are part of the São Francisco Province (São Francisco Craton) and consist of a sequence of metavolcanic-sedimentary rocks of the Nova Lima Group, Rio das Velhas Supergroup (ALMEIDA et al., 1981; LOBATO et al., 2001).
The Córrego do Sítio complex mines occur laterally, one another, and besides these, there are open-pit deposits along a NE-SW lineament of about 3 km, which comprises of the Córrego do Sítio, Cristina and São Bento-Donana shear zones (LIMA, 2012). There are also open-pit deposits, mined since 1986, known as Cristina, Candeia, Rosalino, Grota Funda, Mutuca/Lageado, Cachorro Bravo, Crista, Carvoaria, and Laranjeira (CANALE, 1999).
Geologically the Córrego do Sítio deposits are composed of banded iron formation (BIF), carbonaceous phyllite, carbonaceous schist, chlorite schist, dikes and sills of basic to intermediate metavolcanic rocks, itabirite (rare), metagraywackes, mica schist, phyllite, quartz-sericite schist, and turbidite. Throughout the mine there are milky quartz veins and quartz-carbonate veins, where scattered gold may occur (CANALE, 1999; LOBATO et al., 2001; RONCATO Jr. et al., 2015).
In the Córrego do Sítio deposit the following mineralogical association occurs: actinolite, albite, ankerite, “allanite”, antimony, “apatite”, aragonite, arsenopyrite, berthierite, “biotite”, bornite, boulangerite, calcite, chalcopyrite, “chlorite”, cinnabar, cobaltite, covellite, cristobalite, “electrum”, epidote, galena, “gersdorffite”, goethite, gold, hematite, “hornblende”, “illite”, ilmenite, kaolinite, magnetite, muscovite, paragonite, pyrite, pyrrhotite, quartz, rutile, scheelite, “sericite”, siderite, “smectite”, sphalerite, stibnite, stilpnomelane, tetrahedrite, titanite, tremolite, “tremolite-actinolite”, ullmannite, and zircon (CANALE, 1999; LOBATO et al., 2001; MÁRQUEZ et al., 2006; LIMA, 2012; NEVES; ATENCIO, 2019).
Sulphide zone occurs at depths greater than 100 m. Gold occurs, in higher percentages, near the weathered zones and near the milky and quartz-carbonate veins, and is filling box works (TAKAI et al., 1991; CANALE, 1999).


ALMEIDA, F. F. M. de; HASUI, Y.; BRITO NEVES, B. B. de. Brazilian Structural Provinces: an introduction. Earth Science Review, v. 17, n. 1, p. 1-17, 1981.

CANALE, A. Geologia do depósito Córrego do Sítio. 1999, 142 f. Dissertação (Mestrado em Geociências), Porto Alegre, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, UFRGS, 1999.

LIMA, L. C. Depósito LODE Au-As-Sb Laranjeiras, em metaturbitos do Grupo Nova Lima, Quadrilátero Ferrífero, Minas Gerais. 2012, 306 f. Dissertação (Mestrado em Geociências), Belo Horizonte, Instituto de Geociências, Universidade Federal de Minas Gerais - UFMG, Belo Horizonte, 2012.

LOBATO, L. M.; RIBEIRO-RODRIGUES, L. C.; VIEIRA, F. W. R. Brazil’s premier gold province: Part II: geology and genesis of gold deposits in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero. Mineralium Deposita, v. 36, n. 3-4, p. 249-277, 2001.

MÀRQUEZ, M.; GASPAR, J.; BESSLER, K. E.; MAGELA, G. Process mineralogy of bacterial oxidized gold ore in São Bento mine (Brazil). Hydrometallurgy, v. 83, n. 1-4, p. 114-123, 2006.

NEVES, P. C. P. das; ATENCIO, D. Enciclopédia dos minerais do Brasil: Elementos Nativos e Halogenetos. 2ª ed., Canoas: ULBRA, 344 p., 2019.

RONCATO Jr., J. G.; LOBATO, L. M.; LIMA, L. C.; PORTO, C. G.; SILVA, R. C. F. Metaturbidite-hosted gold deposits, Córrego do Sítio lineament, Quadrilátero Ferrífero, Brazil. Brazilian Journal of Geology, v. 45, n. 1, p. 5-22, 2015.

TAKAI, V.; PINTO, L. C.; DUCHINI Jr. J. Córrego do Sítio gold deposit. E. A. Ladeira (ed.), Brazil Gold’91, v. 1, p. 811-816, 1991.

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