Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil
Abstract The Bonsucesso zinc-lead (Zn-Pb) sulfide deposit is hosted in carbonate rocks from the Vazante Group (transition of the Mesoproterozoic to the Neoproterozoic time), northwest of Minas Gerais State, Brazil. Regional deformation is associated with the thin-skinned tectonics that led to the fo...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Geologia
2023-11-01
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| Series: | Brazilian Journal of Geology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892023000300304&lng=en&tlng=en |
| _version_ | 1797628729479921664 |
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| author | Edson Ricardo Maia Ferraz George Luiz Luvizotto Juliana Okubo Denis Antonio Batiston |
| author_facet | Edson Ricardo Maia Ferraz George Luiz Luvizotto Juliana Okubo Denis Antonio Batiston |
| author_sort | Edson Ricardo Maia Ferraz |
| collection | DOAJ |
| description | Abstract The Bonsucesso zinc-lead (Zn-Pb) sulfide deposit is hosted in carbonate rocks from the Vazante Group (transition of the Mesoproterozoic to the Neoproterozoic time), northwest of Minas Gerais State, Brazil. Regional deformation is associated with the thin-skinned tectonics that led to the formation of the foreland zone of the Brasília Orogen during the Neoproterozoic. These orogenic processes are the trigger of Zn-Pb mineralization in many base-metal deposits in the Vazante Group. Here, we describe the ore textures and the structures of the deposit to define its structural controls in deposit scale and formulate hypotheses about its forming process in the context of other Vazante Zn-Pb deposits. Mineralization distribution is controlled by a high-angle fault zone striking NNW and dipping 60° to WSW. Fault-related fractures functioned as pathways for Zn-Pb-rich fluids to be redistributed and crystallize where chemical conditions were adequate. Mineralization was likely formed in an extensional setting in breccia zones controlled by flexurally induced normal faults related to development of the foreland basin of Brasília Orogen. Later, the entire Vazante sequence underwent an inversion process and extensional structures were reactivated or obliterated. Finally, an understanding of local controls may be of good use to target exploration for new orebodies in the district scale. |
| first_indexed | 2024-03-11T10:44:13Z |
| format | Article |
| id | doaj.art-97953381edda41a58ba4b94a3cf8874a |
| institution | Directory Open Access Journal |
| issn | 2317-4692 |
| language | English |
| last_indexed | 2024-03-11T10:44:13Z |
| publishDate | 2023-11-01 |
| publisher | Sociedade Brasileira de Geologia |
| record_format | Article |
| series | Brazilian Journal of Geology |
| spelling | doaj.art-97953381edda41a58ba4b94a3cf8874a2023-11-14T07:49:27ZengSociedade Brasileira de GeologiaBrazilian Journal of Geology2317-46922023-11-0153310.1590/2317-4889202320190135Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, BrazilEdson Ricardo Maia Ferrazhttps://orcid.org/0000-0001-8883-6205George Luiz Luvizottohttps://orcid.org/0000-0002-6150-8292Juliana Okubohttps://orcid.org/0000-0001-9160-9994Denis Antonio Batistonhttps://orcid.org/0000-0002-6163-1485Abstract The Bonsucesso zinc-lead (Zn-Pb) sulfide deposit is hosted in carbonate rocks from the Vazante Group (transition of the Mesoproterozoic to the Neoproterozoic time), northwest of Minas Gerais State, Brazil. Regional deformation is associated with the thin-skinned tectonics that led to the formation of the foreland zone of the Brasília Orogen during the Neoproterozoic. These orogenic processes are the trigger of Zn-Pb mineralization in many base-metal deposits in the Vazante Group. Here, we describe the ore textures and the structures of the deposit to define its structural controls in deposit scale and formulate hypotheses about its forming process in the context of other Vazante Zn-Pb deposits. Mineralization distribution is controlled by a high-angle fault zone striking NNW and dipping 60° to WSW. Fault-related fractures functioned as pathways for Zn-Pb-rich fluids to be redistributed and crystallize where chemical conditions were adequate. Mineralization was likely formed in an extensional setting in breccia zones controlled by flexurally induced normal faults related to development of the foreland basin of Brasília Orogen. Later, the entire Vazante sequence underwent an inversion process and extensional structures were reactivated or obliterated. Finally, an understanding of local controls may be of good use to target exploration for new orebodies in the district scale.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892023000300304&lng=en&tlng=enzincstructural geologyMVTBrasília BeltMorro do Calcário Formation |
| spellingShingle | Edson Ricardo Maia Ferraz George Luiz Luvizotto Juliana Okubo Denis Antonio Batiston Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil Brazilian Journal of Geology zinc structural geology MVT Brasília Belt Morro do Calcário Formation |
| title | Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil |
| title_full | Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil |
| title_fullStr | Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil |
| title_full_unstemmed | Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil |
| title_short | Structural controls on the Bonsucesso Zinc-Lead Deposit, Vazante Group, Brazil |
| title_sort | structural controls on the bonsucesso zinc lead deposit vazante group brazil |
| topic | zinc structural geology MVT Brasília Belt Morro do Calcário Formation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892023000300304&lng=en&tlng=en |
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