METAL ANOMALY PROSPECTION AT CERRADO. EXAMPLE FOR THE USE OF SI-PHYTOLITHS AT RIACHO DOS MACHADO REGION, MINAS GERAIS, BRAZIL.

Authors

  • Heloiza Márcia Fernades-Horn Private
  • Adolf Heinrich Horn IGC-UFMG
  • Regynaldo Arruda Sampaio ICA-UFMG/Montes Claros
  • Márcio Neves Rodrigues ICA-UFMG/Montes Claros
  • Luana Duarte IGC-UFMG
  • Essaid Bilal EMSE-Ècole des Mines de St. Etienne
  • Hernando Baggio-Filho UFVJM/Diamantina
  • Isabela Claret Torres IGC-UFMG

DOI:

https://doi.org/10.21715/GB2358-2812.2018321040

Abstract

The target area of this work is a heavy metal anomaly in the surroundings of a gold mine and a lead mining complex. This work investigated the distribution of selected heavy elements in soil samples and Si-Phytoliths from plants. The aim was to verify if metal contents are indicative for metal anomalies in the soil. Plants and soil samples were collected in profiles over granitic-gneissic rocks, which form the basement, in tectonized contact with the overlaying sedimentary units belonging to the Riacho dos Machados Group, part of the Espinhaço Super Group. The whole rock substrate is covered by lateritic to arenitic soils with different exposure depths. Metal-rich fluid invaded these units, forming metal anomalies culming in Zn-Pb-Au deposits, like that of Salobre-Porteirinha. After appropriate preparation, the samples were, analyzed by ICP-OES (Si-Phytoliths) and FRX (soil). Anomalies in the investigated profile are indicated by high metal contents in the Si-Phytoliths of the selected species. Using different species the metal concentration in different depths can be determined in a simple and easy way. The Si-Phytolith concentrations seem to reproduce better the rock metal anomalies than the soil samples.

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Author Biographies

Heloiza Márcia Fernades-Horn, Private

Engenheiro  Agrônomo

Adolf Heinrich Horn, IGC-UFMG

Geological Department Professor Subchef

Luana Duarte, IGC-UFMG

Geological Department; undergraduate student

Essaid Bilal, EMSE-Ècole des Mines de St. Etienne

Professor

Hernando Baggio-Filho, UFVJM/Diamantina

Professor; Coordenator of Postgraduate course

Isabela Claret Torres, IGC-UFMG

Geological Department; Postdoctorate student

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Published

2018-08-30

How to Cite

Fernades-Horn, H. M., Horn, A. H., Sampaio, R. A., Rodrigues, M. N., Duarte, L., Bilal, E., … Torres, I. C. (2018). METAL ANOMALY PROSPECTION AT CERRADO. EXAMPLE FOR THE USE OF SI-PHYTOLITHS AT RIACHO DOS MACHADO REGION, MINAS GERAIS, BRAZIL. Geochimica Brasiliensis, 32(1), 40. https://doi.org/10.21715/GB2358-2812.2018321040

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Articles