The Serra Pelada Au-PGE deposit, Serra dos Carajás (Pará State, Brazil): geological and geochemical indications for a composite mineralising process

Moroni, M.; Girardi, Vicente Antônio Vitório; Ferrario, A.

doi:10.1007/s001260100201

Cited by 55 publications

(49 citation statements)

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“…Because the coarse-grained gold was recovered from disaggregated and powdery material, supergene enrichment has been suggested to account for the bonanza grade (Tallarico et al 2000, Moroni et al 2001. Our contribution records what seems to be a hydrothermal assemblage of palladium minerals associated with coarse-grained palladian gold.…”

Section: Introductionmentioning

confidence: 80%

“…Because the Serra Pelada garimpo is located in a lateritic profile, supergene processes have been suggested to account for the bonanza near-surface mineralization (Meireles & Silva 1988, Tallarico et al 2000, Moroni et al 2001. However, the investigation of the coarse-grained dendrites of palladian gold has revealed PGM assemblages having an As-Sb-Se-Hg signature characteristic of epithermal deposits (Lindgren 1928).…”

Section: Dendrites Of Palladian Goldmentioning

confidence: 99%

“…1). Reviews of the geological setting of the Carajás mineral province can be found elsewhere (e.g., DOCEGEO 1988, Villas & Santos 2001, Moroni et al 2001, and only a brief account of the Serra Pelada Au-Pd-Pt deposit is given here.…”

Section: Introductionmentioning

confidence: 99%

“…At depth, the mineralization is less friable and lacks the aggregates of coarse-grained, characteristically dendritic, palladian gold. Located in the deeply weathered hinge-zone of a recumbent syncline, the deep-seated mineralization consists of brecciated, finegrained carbonaceous rocks with variable amounts of quartz, carbonaceous matter, white mica, kaolinite, hematite, goethite and manganese oxide (Tallarico et al 2000, Moroni et al 2001. It is surrounded by a 5-to 50-m-thick zone of silicification, and broadly follows the contact between dolomitic marble and carbonaceous metasiltstone of the Rio Fresco Formation (Tallarico et al 2000).…”

Section: (Traduit Par La Rédaction)mentioning

confidence: 99%

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PALLADIUM AND PLATINUM MINERALS FROM THE SERRA PELADA Au-Pd-Pt DEPOSIT, CARAJAS MINERAL PROVINCE, NORTHERN BRAZIL

Cabral

Lehmann

Kwitko-Ribeiro

et al. 2002

The Canadian Mineralogist

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The Serra Pelada garimpo (1980)(1981)(1982)(1983)(1984) was the site of the most spectacular gold rush in recent history, but the mineralogy of the bonanza-style mineralization has not so far been documented in detail. Rediscovery of an early drill-core, recovered in 1982 from the near-surface lateritic portion of the garimpo area, has provided coarse-grained gold aggregates for this study. The centimeter-long aggregates of gold occur in powdery, earthy material. They exhibit a delicate arborescent fabric and are coated by goethite. Four compositional types of gold are recognized: palladian gold with an atomic ratio Au:Pd of 7:1 ("Au 7 Pd"), Hgbearing palladian gold (Au-Pd-Hg), Pd-bearing gold with up to 3 wt.% Pd (Pd-poor gold) and pure gold. A number of platinumgroup minerals (PGM) are included in, or attached to the surface of, palladian gold: "guanglinite", Sb-bearing "guanglinite", atheneite and isomertieite, including the noteworthy presence of Se-bearing PGM (Pd-Pt-Se, Pd-Se, Pd-Hg-Se and Pd-Bi-Se phases, and sudovikovite and palladseite). They define an As-Sb-Hg-Se mineral assemblage typical of hydrothermal vein-type deposits formed at relatively low temperatures. Native palladium, characteristically situated in the goethite coating, is intimately associated with a Pd-O phase. The remarkable occurrence of native platinum associated with Pd-bearing gold, PGM (compositionally close to mertieite-II and isomertieite) and berzelianite from a nearby prospect (Elefante prospect) is also recorded.

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Section: Introductionmentioning

confidence: 80%

Section: Dendrites Of Palladian Goldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: (Traduit Par La Rédaction)mentioning

confidence: 99%

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PALLADIUM AND PLATINUM MINERALS FROM THE SERRA PELADA Au-Pd-Pt DEPOSIT, CARAJAS MINERAL PROVINCE, NORTHERN BRAZIL

Cabral

Lehmann

Kwitko-Ribeiro

et al. 2002

The Canadian Mineralogist

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“…Serra Pelada is founded on a fold of metamorphic rocks with little fluvial influence and is composed of a conglomerate of sandstone and siltite (Moroni et al, 2001), as well as a great diversity of primary minerals and oxides (Tallarico et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Contamination and Soil Biological Properties in the Serra Pelada Mine - Amazonia, Brazil

Teixeira

Fernandes

Ferreira

et al. 2018

Rev. Bras. Ciênc. Solo

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Sulphur, selenium and silver contents of palladiferous gold from Serra Pelada, northern Brazil

Cabral

Beaudoin

Lehmann

2005

Mineral Deposit Research: Meeting the Global Challenge

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The Serra Pelada Au-PGE deposit, Serra dos Carajás (Pará State, Brazil): geological and geochemical indications for a composite mineralising process

Cited by 55 publications

References 0 publications

PALLADIUM AND PLATINUM MINERALS FROM THE SERRA PELADA Au-Pd-Pt DEPOSIT, CARAJAS MINERAL PROVINCE, NORTHERN BRAZIL

PALLADIUM AND PLATINUM MINERALS FROM THE SERRA PELADA Au-Pd-Pt DEPOSIT, CARAJAS MINERAL PROVINCE, NORTHERN BRAZIL

Contamination and Soil Biological Properties in the Serra Pelada Mine - Amazonia, Brazil

Sulphur, selenium and silver contents of palladiferous gold from Serra Pelada, northern Brazil

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