Projeto Vanádio de Maracás - ADIMB€¦ · São Francisco Craton Neoarchaen and Rhyacian Magmatic...
Transcript of Projeto Vanádio de Maracás - ADIMB€¦ · São Francisco Craton Neoarchaen and Rhyacian Magmatic...
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Projeto Vanádio de Maracás
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Mapa de
Localização
Projeto Maracás- Bahia, Brasil
Brasil
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São Francisco Craton Neoarchaen and Rhyacian Magmatic Deposits
2.06 Ga Ni-Cu Mirabela & Palestina
2.6 Ga Cu Caraiba
B
A
Along the border of the Meso-
Neoarchaean blocks there are
various metalogenetic corridors
related to magamtic ore systems
Neoarchaen intraplate
Magmatism
Caraiba Cu- deposit and the
Fe-Ti-V Maracás deposit are
related to a Neoarchean (2.6
Ga) intraplate mafic-ultramafic
magmatism, and was latter
affected by a 2.0Ga
tectonometamorphic event.
Rhyacian intraplate
magmatism
Mirabela-Palestina (Ni), Rio
Piau- Samaritana-Carapussê
(Fe-Ti-V) intrusions are related
to a 2.06 Ga
Cr
Fe-Ti-V
2.6 Ga Fe-Ti-V Maracás
2.06 Ga Cr Jacurici
2.06 Ga Fe-Ti-V Rio Piau& Carapussê-Samaritana
2.6 or 2.06 Ga? Cr campo Formoso
LEGEND
Phanerozoic covers
Limits of the São Francisco Craton
Gavião Block–Gneissic Achaean-
Palaeoproterozoic rocks and
supracrustals
Jequié Block - granulitic rocks
Itabuna-Salvador-Curaçá Orogen OISC
Mesophanerozoic covers
Neoproterozoic orogen
Neoproterozoic covers
2.0 Ga Fe-Cu Arapiraca
Cortesia de Reinaldo Brito
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Contexto Geológico Regional
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Contexto
Geológico Local Gulçari A Gulçari A
Gulçari B Gulçari B
São José São José
Novo Amparo Novo Amparo
Novo Amparo Norte Novo Amparo Norte
Gulçari A Norte Gulçari A Norte
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Mapa Integrado Geo-Mag Área Norte
Gulçari A
Gulçari B
São José
Novo Amparo
Novo Amparo Norte
Gulçari A Norte
Novo Amparo Norte
São José
Gulçari A Norte
Gulçari B
Gulçari B Sul
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Mapa Integrado Geo-Mag Área Sul
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Alvo Gulçari A
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Mapa Geológico Gulçari A
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1
1
2
2
Piroxenito com magnetita
disseminado
Magnetita-Piroxenito
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3
3
Magnetitito fitado
(microestratificação ritimica)
Magnetitito maciço
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4
5
4 5
Magnetitito maciço
Magnetita-Piroxenito
Magnetita-Piroxenito
Magnetitito fitado
(microestratificação ritimica)
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Imagens eletrônica de varredura
FGA 73 FGA 73
Mag
Mag
Ilm
Mag
Mag
Mag
Mag
Ilm
Ilm
Ilm
Ilm
Ilm
Ilm
Ilm
Mag
Mag
FGA 25
Mag
Mag
Mag
Ilm
Ilm
A
B C
Magnetita, ilmenita adcumulato
Texturas de exsolução em sanduiche,
treliça e grãos exsolvidos
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Alvo Gulçari A- 22.7 milhões
de Ton com teor médio de
1,23% de V2O5
Possível Sub-produto
PGMs.
Recursos Medidos e Indicados
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Platinóides
Minerais do grupo da platina (PGM) estão geralmente associados a sulfetos e arsenietos
de níquel
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PGE FGA 03
FGA 03 FGA 07
Grãos de esperrilita (PtAs2) e
outros sulfetos com platinóides
trazidos pelos primocristais de
ilmenita. Estanho bismutietos de
paládio também como grãos
contidos em ilmenita e às vezes
na magnetita.
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FGA 03
b)Grãos de esperrilita
(PtAs2) contido em
primocristais de ilmenita
incluso na magnetita
c) Arsenieto de niquel platinífero
contido em ilmenita com exsolução
de lamelas de hematita.
FGA 04
Hem