Titre:	Geoelectric signature of gold mineralization in the Alta Floresta Gold Province, Mato Grosso State, Brazil
Auteur(s):	Seimetz, Eduardo Xavier Costa, Alexandre Santos Jeronimo da Borges, Welitom Rodrigues Ianniruberto, Marco Canata, Rafael Espindola
metadata.dc.identifier.orcid:	https://orcid.org/0000-0001-5726-5884 https://orcid.org/0000-0002-5158-1947 https://orcid.org/0000-0002-9056-9668
metadata.dc.contributor.affiliation:	University of Brasilia, Institute of Geosciences University of Brasilia, Institute of Geosciences University of Brasilia, Institute of Geosciences University of Brasilia, Institute of Geosciences Federal University of Paraná, Institute of Geology, Earth Science Sector
Assunto::	Polarização induzida Província Aurífera de Alta Floresta Ouro - minas e mineração
Date de publication:	31-jan-2023
Editeur:	MDPI
Référence bibliographique:	SEIMETZ, Eduardo Xavier et al. Geoelectric signature of gold mineralization in the Alta Floresta Gold Province, Mato Grosso State, Brazil. Minerals, [S.l.], v. 13, n. 2, 203, 2023. DOI: https://doi.org/10.3390/min13020203. Disponível em: https://www.mdpi.com/2075-163X/13/2/203. Acesso em: 27 out. 2023.
Abstract:	The Alta Floresta Gold Province (PAAF) is abundant in gold deposits and, located in the state of Mato Grosso, Brazil, is an ideal place to study the geoelectric signature of gold mineralization. Auriferous mineralization occurs along shear zones in quartz veins and disseminated granites in this region. Ores are associated with oxides and sulfides, mainly with pyrites. To identify primary gold or continuities of the mineralized zones, data were acquired using the geophysical methods of electrical resistivity and induced polarization in three gold mines: Raimunda, Truilio, and Porteira. Dipole–dipole arrays with electrode spacings of 20 and 25 m were used to investigate up to 100 m in depth. Resistivity and chargeability range scales were developed with statistical analyses of all the geophysical and geological data. The geophysical models of the Raimunda and Truilio gold mines showed coherence with the boreholes, but the geophysical models of the Porteira gold mine were not coherent with the boreholes. The resistivity and chargeability parameters indicated that the lithotypes (soils, saprolites, and monzogranites) could be characterized and identified as potential mineralized targets. The soils ranged from 1000 to 8000 ohm.m, the saprolites had values from 150 to 800 ohm.m, and the monzogranite values were from 1100 to 9000 ohm.m. The mineralized targets had values from 18 to 35 mV/V. The results confirm the efficiency of the resistivity and induced polarization methods to find sulfides in shear zones in the Alta Floresta Gold Province.
metadata.dc.description.unidade:	Instituto de Geociências (IG)
Licença::	Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
DOI:	https://doi.org/10.3390/min13020203
Collection(s) :	Artigos publicados em periódicos e afins

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