Mining heritage related to Banded Iron Formation of Itabira Group, Quadrilátero Ferrífero, Minas Gerais, Brazil

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Marco E. Ciriotti
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Mining heritage related to Banded Iron Formation of Itabira Group, Quadrilátero Ferrífero, Minas Gerais, Brazil

Messaggio da Marco E. Ciriotti » sab 24 set, 2022 20:34

Referenza:
▪ Dias Cavalcanti, J.A., Santana da Silva, M., Schobbenhaus, C., Atencio, D., de Mota Lima, H. (2022): Geoconservation of Geological and Mining Heritage Related to Banded Iron Formation of Itabira Group, Quadrilátero Ferrífero, Minas Gerais, Brazil: a challenging issue. (in press)-.

Abstract
The Quadrilátero Ferrífero is a mineral-rich region covering about 7,000 square kilometres in the central-southern part of the Brazil. It is known for its extensive gold and iron ore reserves, and for its historical cities. Many geological and mining sites related to gold mining and iron ore mining are in protected areas, and have been studied for preservation and use in educational and tourism projects, but at the same time, it has suffered many pressures from mining companies and its preservation is in a constant state of alert. Recently, geoconservation studies have emphasized the value of geological and mining heritage, its importance for understanding the history of territorial occupation, as well as the geological evolution of our planet. For example, the Cauê Peak is the type-locality of Cauê Formation, six new minerals (arsenopalladinite, atheneite, isomertieite, palladseite, jacutingaite and palladinite) were identified in the Au-Pd deposits were listed by the IMA (International Mineralogical Association) and where the systemic iron mining activities began with the creation of the first mining company, the Brazilian Hematite Syndicate, in 1909. Since the 19th century, many these geosites have been the target of research and educational field trips in the training of geologists and mining engineers at the Ouro Preto School of Mines and Federal University of Minas Gerais. These geosites can be used to explain the geological history in the Archaean-Paleoproterozoic boundary of Quadrilátero Ferrífero, the depositional environment of banded iron formations of Cauê Formation, and also through the Transamazonian (2.1-1.94Ga) and Brazilian (650-450Ma) orogeny responsible for development of Au-Pd and iron deposits. When observe the Cauê Peak, the Itabira Peak and the Curral Moutain Ridge, perceive the different stages in the evolution of the anthropic landscape. The Cauê Peak has been transformed into open pit mine, the Itabira Peak resists surrounded from all sides by mining activities and the Curral Mountain Ridge undergoes processes for authorization of mining activities in an area that should be preserved.
Marco E. Ciriotti

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