Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)

Detalhes bibliográficos
Autor(a) principal: Moreira,César Augusto
Data de Publicação: 2021
Outros Autores: Carneiro,Henrique Pelorca, Casagrande,Matheus Felipe Stanfoca, Hartwig,Marcos Eduardo, Hansen,Marco Antonio Fontoura
Tipo de documento: Artigo
Idioma: eng
Título da fonte: REM - International Engineering Journal
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2021000200209
Resumo: Abstract The geophysical diagnosis of mineral deposits can be extremely useful in detailing mineralized zones and is a strategy for direct sampling by probing holes for content analysis. This study involves the combined use of Electrical geophysical methods (DC resistivity and Induced Polarization), geological recognition and structural field analysis, with a study of the mineralized occurrence of copper, previously described in a systematic geochemical survey carried out by the Geological Survey of Brazil (CPRM), located in the north of the Camaquã Basin, extreme south of Brazil. The mineral occurrence is partially outcropped and consists of quartz vein shafts with malachite and relic structures of sulfides, contained in schist. Structural data obtained in the field revealed the existence of a system of fracture pairs in the directions N40-50W and N70-80E. Such information is presented in the programming of the geophysical data acquisition scheme, which consisted of 6 lines of electrical tomography with 410m each, in azimuthal disposition and Schlumberger arrangement, where all lines cross a single center and are separated according to an angle of 30°, in an attempt to cover fractures in various orientations. The 2D results reveal the existence of high chargeability zones (>40mV/V) positioned below the 40m depth. These data were interpolated in 3D visualization models and generated resistivity and chargeability maps for several depths, which integrated with previous structural data, and indicate the existence of zones with potential sulfide concentration with strong structural control, in addition to clear target recognition for direct and objective probing evaluation, with rationalization of costs.
id FG-1_7f7d097a137e4c750fa489fc141fad1d
oai_identifier_str oai:scielo:S2448-167X2021000200209
network_acronym_str FG-1
network_name_str REM - International Engineering Journal
repository_id_str
spelling Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)mineral explorationDC resistivityinduced polarizationsulfide3D visualization modelAbstract The geophysical diagnosis of mineral deposits can be extremely useful in detailing mineralized zones and is a strategy for direct sampling by probing holes for content analysis. This study involves the combined use of Electrical geophysical methods (DC resistivity and Induced Polarization), geological recognition and structural field analysis, with a study of the mineralized occurrence of copper, previously described in a systematic geochemical survey carried out by the Geological Survey of Brazil (CPRM), located in the north of the Camaquã Basin, extreme south of Brazil. The mineral occurrence is partially outcropped and consists of quartz vein shafts with malachite and relic structures of sulfides, contained in schist. Structural data obtained in the field revealed the existence of a system of fracture pairs in the directions N40-50W and N70-80E. Such information is presented in the programming of the geophysical data acquisition scheme, which consisted of 6 lines of electrical tomography with 410m each, in azimuthal disposition and Schlumberger arrangement, where all lines cross a single center and are separated according to an angle of 30°, in an attempt to cover fractures in various orientations. The 2D results reveal the existence of high chargeability zones (>40mV/V) positioned below the 40m depth. These data were interpolated in 3D visualization models and generated resistivity and chargeability maps for several depths, which integrated with previous structural data, and indicate the existence of zones with potential sulfide concentration with strong structural control, in addition to clear target recognition for direct and objective probing evaluation, with rationalization of costs.Fundação Gorceix2021-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2021000200209REM - International Engineering Journal v.74 n.2 2021reponame:REM - International Engineering Journalinstname:Fundação Gorceix (FG)instacron:FG10.1590/0370-44672020740103info:eu-repo/semantics/openAccessMoreira,César AugustoCarneiro,Henrique PelorcaCasagrande,Matheus Felipe StanfocaHartwig,Marcos EduardoHansen,Marco Antonio Fontouraeng2021-03-25T00:00:00Zoai:scielo:S2448-167X2021000200209Revistahttps://www.rem.com.br/?lang=pt-brPRIhttps://old.scielo.br/oai/scielo-oai.php||editor@rem.com.br2448-167X2448-167Xopendoar:2021-03-25T00:00REM - International Engineering Journal - Fundação Gorceix (FG)false
dc.title.none.fl_str_mv Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
title Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
spellingShingle Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
Moreira,César Augusto
mineral exploration
DC resistivity
induced polarization
sulfide
3D visualization model
title_short Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
title_full Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
title_fullStr Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
title_full_unstemmed Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
title_sort Geophysical and structural survey in copper occurrence located in the northern region of the Camaquã basin (RS)
author Moreira,César Augusto
author_facet Moreira,César Augusto
Carneiro,Henrique Pelorca
Casagrande,Matheus Felipe Stanfoca
Hartwig,Marcos Eduardo
Hansen,Marco Antonio Fontoura
author_role author
author2 Carneiro,Henrique Pelorca
Casagrande,Matheus Felipe Stanfoca
Hartwig,Marcos Eduardo
Hansen,Marco Antonio Fontoura
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Moreira,César Augusto
Carneiro,Henrique Pelorca
Casagrande,Matheus Felipe Stanfoca
Hartwig,Marcos Eduardo
Hansen,Marco Antonio Fontoura
dc.subject.por.fl_str_mv mineral exploration
DC resistivity
induced polarization
sulfide
3D visualization model
topic mineral exploration
DC resistivity
induced polarization
sulfide
3D visualization model
description Abstract The geophysical diagnosis of mineral deposits can be extremely useful in detailing mineralized zones and is a strategy for direct sampling by probing holes for content analysis. This study involves the combined use of Electrical geophysical methods (DC resistivity and Induced Polarization), geological recognition and structural field analysis, with a study of the mineralized occurrence of copper, previously described in a systematic geochemical survey carried out by the Geological Survey of Brazil (CPRM), located in the north of the Camaquã Basin, extreme south of Brazil. The mineral occurrence is partially outcropped and consists of quartz vein shafts with malachite and relic structures of sulfides, contained in schist. Structural data obtained in the field revealed the existence of a system of fracture pairs in the directions N40-50W and N70-80E. Such information is presented in the programming of the geophysical data acquisition scheme, which consisted of 6 lines of electrical tomography with 410m each, in azimuthal disposition and Schlumberger arrangement, where all lines cross a single center and are separated according to an angle of 30°, in an attempt to cover fractures in various orientations. The 2D results reveal the existence of high chargeability zones (>40mV/V) positioned below the 40m depth. These data were interpolated in 3D visualization models and generated resistivity and chargeability maps for several depths, which integrated with previous structural data, and indicate the existence of zones with potential sulfide concentration with strong structural control, in addition to clear target recognition for direct and objective probing evaluation, with rationalization of costs.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2021000200209
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2021000200209
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0370-44672020740103
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Fundação Gorceix
publisher.none.fl_str_mv Fundação Gorceix
dc.source.none.fl_str_mv REM - International Engineering Journal v.74 n.2 2021
reponame:REM - International Engineering Journal
instname:Fundação Gorceix (FG)
instacron:FG
instname_str Fundação Gorceix (FG)
instacron_str FG
institution FG
reponame_str REM - International Engineering Journal
collection REM - International Engineering Journal
repository.name.fl_str_mv REM - International Engineering Journal - Fundação Gorceix (FG)
repository.mail.fl_str_mv ||editor@rem.com.br
_version_ 1754734691881058304