THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES

Cabral, Alexandre Raphael; Lehmann, Bernd; Tupinambá, Miguel; Schlosser, Sandra; Kwitko-Ribeiro, Rogerio; Abreu, Francisco Robério de

doi:10.2113/gsecongeo.104.8.1265

Cited by 48 publications

(44 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On top of the cliff, there are outcrops, dispersed on the densely vegetated plateau, of hematitic phyllite, quartzite with tourmalinite layers and hematite-quartz veins. Although primary Au-Pd-Pt mineralisation on top of the cliff has not been found, the abundance of vein hematite, the presence of detrital Pd-Pt-bearing gold with hematite inclusions and arborescent crystals of palladiferous gold, all in the platiniferous gravels, link the alluvial deposit to a proximal source of hematite-rich, Au-Pd-Ptbearing hydrothermal veins (Cabral et al, 2009a).…”

Section: The Córrego Bom Sucesso Alluvial Depositmentioning

confidence: 99%

“…Regionally, Córrego Bom Sucesso belongs to the platiniferous Au-Pd belt of Minas Gerais, the N-S trend of which is controlled by the trace of thrust faults generated during the Brasiliano orogeny ( Fig. 1; Cabral et al, 2009a).…”

Section: Relative Timing Of Brine Percolationmentioning

confidence: 99%

“…as cross-cutting veins of specular hematite and quartz (Cabral et al, 2009a, and references therein). Vein hematite from the mineralised veins can be distinguished from the country-rock itabirite and hematite ore by higher contents of Ti and/or Cr (Cabral et al, 2006).…”

Section: Titaniferous Hematite and Prospecting For Au-pd-pt Mineralismentioning

confidence: 99%

“…The loci of this vein-style Au-Pd-Pt mineralisation define a roughly N-S-trending belt, which is delineated by lineaments of thrusts related to the assembly of West Gondwana during the~0.6-Ga Brasiliano orogenic cycle ( Fig. 1; Cabral et al, 2009a;and references therein).…”

Section: Introductionmentioning

confidence: 99%

“…Alluvial diamonds and precious metals have been manually mined for over two centuries at Córrego Bom Sucesso. Despite its historical importance and economic potential for primary Au-Pd-Pt mineralisation, recent works have largely focussed on the exotic mineral assemblage of the Córrego (Cabral et al, 2009a, and references therein), encompassing the Quadrilátero Ferrífero and the southern Serra do Espinhaço. The belt is delineated by representative examples of a variety of auriferous veins with characteristic Pd-Pt signature (jacutinga) and platiniferous alluvia.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Geology, mineral chemistry and tourmaline B isotopes of the Córrego Bom Sucesso area, southern Serra do Espinhaço, Minas Gerais, Brazil: Implications for Au–Pd–Pt exploration in quartzitic terrain

Cabral

Lehmann

Tupinambá

et al. 2011

Journal of Geochemical Exploration

View full text Add to dashboard Cite

Section: The Córrego Bom Sucesso Alluvial Depositmentioning

confidence: 99%

Section: Relative Timing Of Brine Percolationmentioning

confidence: 99%

Section: Titaniferous Hematite and Prospecting For Au-pd-pt Mineralismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geology, mineral chemistry and tourmaline B isotopes of the Córrego Bom Sucesso area, southern Serra do Espinhaço, Minas Gerais, Brazil: Implications for Au–Pd–Pt exploration in quartzitic terrain

Cabral

Lehmann

Tupinambá

et al. 2011

Journal of Geochemical Exploration

View full text Add to dashboard Cite

Distribution and Mobility of Platinum-Group Elements in the Late Cretaceous Ni-laterite in the Northern Oman Mountains

Al-Khirbash

Ahmed²

2021

Preprint

View full text Add to dashboard Cite

Unconformity‐covering pillow lava dated at 2.14 Ga: Challenging the “stable‐shelf” Minas Supergroup of the Quadrilátero Ferrífero, Minas Gerais, Brazil

et al. 2022

View full text Add to dashboard Cite

We report on the occurrence of pillow lava in the upper part of the banded‐iron‐formation (BIF) sequence of the Quadrilátero Ferrífero, famous for hosting world‐class iron‐ore deposits in Minas Gerais, Brazil. A pillow‐lava domain is found as an outlier within the BIF sequence, known as the Itabira iron formation or the Itabira Group. The pillow lava occurs as lateritized, indurated crusts in a sequence of ochreous itabirite, the weathered expression of dolomitic itabirite, a metamorphosed BIF rock containing dolomite. About 90 zircon grains, extracted from two samples of lateritized pillow lava, an indurated pillow rim and a friable pillow core, yielded Archaean to Palaeoproterozoic ages between 3.37 and 2.14 Ga, with age clusters at 2.98, 2.72, 2.25, and 2.14 Ga, and minor clusters at 3.37, 3.26, 3.16, and 2.82 Ga. The youngest grains, all exhibiting perfectly euhedral crystals, defined a Concordia age at 2,141 ± 6 Ma, interpreted as the age of subaqueous volcanism. This young zircon age and the perfectly euhedral zircon crystals suggest that the pillow‐lava domain represents an outlier of Palaeoproterozoic volcanic rocks, which covered the unconformity between the Itabira Group and the overlying Piracicaba Group. The finding of pillow lava lends support to previous, but usually ignored works, which described metavolcanic rocks in spatial association with the Itabira Group, and provides evidence for subaqueous volcanism that challenges the prevailing view of a stable‐shelf or passive‐margin setting for the geological evolution of the Minas Supergroup.

show abstract

THE PLATINIFEROUS Au-Pd BELT OF MINAS GERAIS, BRAZIL, AND GENESIS OF ITS BOTRYOIDAL Pt-Pd AGGREGATES

Cited by 48 publications

References 47 publications

Geology, mineral chemistry and tourmaline B isotopes of the Córrego Bom Sucesso area, southern Serra do Espinhaço, Minas Gerais, Brazil: Implications for Au–Pd–Pt exploration in quartzitic terrain

Geology, mineral chemistry and tourmaline B isotopes of the Córrego Bom Sucesso area, southern Serra do Espinhaço, Minas Gerais, Brazil: Implications for Au–Pd–Pt exploration in quartzitic terrain

Distribution and Mobility of Platinum-Group Elements in the Late Cretaceous Ni-laterite in the Northern Oman Mountains

Unconformity‐covering pillow lava dated at 2.14 Ga: Challenging the “stable‐shelf” Minas Supergroup of the Quadrilátero Ferrífero, Minas Gerais, Brazil

Contact Info

Product

Resources

About