Aplicação de índice mineralógico como apoio na avaliação de reservas da mina de fosfato de Cajati-SP

Bonás, Thiago Bastos; Sant'Agostino, Lília Mascarenhas

doi:10.11606/d.44.2007.tde-17042007-094628

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“…The classification in lithotypes presented here originates from the geological model elaborated by the research team of the company, which followed the same standards applied to the geological model of Morro da Mina apatite deposit (Sant' Agostino et al 2001, Bonas 2007. The classification presents the main characteristics of the rocks that influence the current ore beneficiation process, such as rock grain size, amount of macroscopically recognizable mineral species, and grain size of these minerals, highlighting apatite and carbonates as ore minerals, and magnetite and phlogopite as gangue ones (Tab.…”

Section: Mesquita Sampaio Lithotypesmentioning

confidence: 99%

Lithogeochemistry and 3D geological modeling of the apatite-bearing Mesquita Sampaio beforsite, Jacupiranga alkaline complex, Brazil

Oliveira

Sant'Agostino

2020

Braz. J. Geol.

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The Mesquita Sampaio beforsite is a mineral exploration area with apatite mineralization occurring near the northern portion of the Morro da Mina apatite deposit (Cajati Mine), in the Jacupiranga Alkaline Complex. This study presents the mineralogical, geochemical and 3D geological modeling data of this target. Four lithotypes are presented for Mesquita Sampaio: the fine-grained beforsite (FGB), the coarse-grained beforsite (CGB), the xenolith zone (XEN), and the jacupirangite ( JAC). The 3D geological model shows the Mesquita Sampaio beforsite as a vertical body with an NNW direction and approximately 350 meters in length, 150 meters in width, and 400 meters of depth, with open extensions. The main mineral assemblage of the beforsite is dolomite, apatite, phlogopite, serpentine, calcite, and magnetite, in order of abundance. The distribution of major elements for both types of beforsites (FGB and CGB) indicates the same composition with only a small variation in the mineral proportions. Although no direct contact relation between Mesquita Sampaio and Morro da Mina is known, both may be the same carbonatite body with a gradual compositional variation, or the Mesquita Sampaio beforsite could be a distinct late or even earlier carbonatite pipe.

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Section: Mesquita Sampaio Lithotypesmentioning

confidence: 99%

Lithogeochemistry and 3D geological modeling of the apatite-bearing Mesquita Sampaio beforsite, Jacupiranga alkaline complex, Brazil

Oliveira

Sant'Agostino

2020

Braz. J. Geol.

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Aplicação de índice mineralógico como apoio na avaliação de reservas da mina de fosfato de Cajati-SP

Abstract: BONÁS, T. B. Aplicação de índice mineralógico como apoio a avaliação de reserva da mina de fosfato de Cajati-SP. 2007. 77f. Dissertação (Mestrado)-Instituto de Geociências,

Cited by 1 publication

References 2 publications

Lithogeochemistry and 3D geological modeling of the apatite-bearing Mesquita Sampaio beforsite, Jacupiranga alkaline complex, Brazil

Lithogeochemistry and 3D geological modeling of the apatite-bearing Mesquita Sampaio beforsite, Jacupiranga alkaline complex, Brazil

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