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Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite

(2017) GEOLOGICA BELGICA. 20(1-2). p.15-32
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Abstract
The mafic-ultramafic intrusions of the Karagwe-Ankole belt in Burundi are considered as a new potential source for platinum group elements (PGE). The intrusions have mainly been studied for their PGE potential with regard to PGE concentration, but the mineralogical distribution of PGE has not been examined to the same level. This study focuses on the Pd and Rh distribution in pentlandite of ultramafic rocks of the Musongati layered intrusion. The results are based on whole rock and pentlandite analyses which were incorporated into a mass balance. Palladium proportions in pentlandite vary between 4 and 69%. Rhodium is present in proportions ranging from 1-39% in pentlandite. Other PGE distributions could not be determined in pentlandite due to concentrations below detection limits. The results from this study demonstrate that Pd and Rh are hosted by sulfides since sulfur saturation of the magma occurred early on, perhaps before or simultaneously with the precipitation of silicate minerals. Based on these findings, a preliminary model for the mineralization of PGE in the Musongati intrusion is proposed.
Keywords
mafic-ultramafic, layered intrusion, Karagwe-Ankole belt, LA-ICP-MS, NiS FA, pentlandite, mass balance, sulfur saturation, KARAGWE-ANKOLE BELT, MAFIC-ULTRAMAFIC INTRUSIONS, NIS FIRE-ASSAY, BUSHVELD COMPLEX, SOUTH-AFRICA, SULFIDE DEPOSITS, ICP-MS, SIDEROPHILE ELEMENTS, CHALCOPHILE ELEMENTS, GEOLOGICAL SAMPLES

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MLA
Paredis, Bram, Philippe Muchez, and Stijn Dewaele. “Platinum Group Element Mineralization at Musongati (Burundi) : Concentration and Pd-Rh Distribution in Pentlandite.” GEOLOGICA BELGICA 20.1-2 (2017): 15–32. Print.
APA
Paredis, B., Muchez, P., & Dewaele, S. (2017). Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite. GEOLOGICA BELGICA, 20(1-2), 15–32.
Chicago author-date
Paredis, Bram, Philippe Muchez, and Stijn Dewaele. 2017. “Platinum Group Element Mineralization at Musongati (Burundi) : Concentration and Pd-Rh Distribution in Pentlandite.” Geologica Belgica 20 (1-2): 15–32.
Chicago author-date (all authors)
Paredis, Bram, Philippe Muchez, and Stijn Dewaele. 2017. “Platinum Group Element Mineralization at Musongati (Burundi) : Concentration and Pd-Rh Distribution in Pentlandite.” Geologica Belgica 20 (1-2): 15–32.
Vancouver
1.
Paredis B, Muchez P, Dewaele S. Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite. GEOLOGICA BELGICA. 2017;20(1-2):15–32.
IEEE
[1]
B. Paredis, P. Muchez, and S. Dewaele, “Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite,” GEOLOGICA BELGICA, vol. 20, no. 1–2, pp. 15–32, 2017.
@article{8529642,
  abstract     = {The mafic-ultramafic intrusions of the Karagwe-Ankole belt in Burundi are considered as a new potential source for platinum group elements (PGE). The intrusions have mainly been studied for their PGE potential with regard to PGE concentration, but the mineralogical distribution of PGE has not been examined to the same level. This study focuses on the Pd and Rh distribution in pentlandite of ultramafic rocks of the Musongati layered intrusion. The results are based on whole rock and pentlandite analyses which were incorporated into a mass balance. Palladium proportions in pentlandite vary between 4 and 69%. Rhodium is present in proportions ranging from 1-39% in pentlandite. Other PGE distributions could not be determined in pentlandite due to concentrations below detection limits. The results from this study demonstrate that Pd and Rh are hosted by sulfides since sulfur saturation of the magma occurred early on, perhaps before or simultaneously with the precipitation of silicate minerals. Based on these findings, a preliminary model for the mineralization of PGE in the Musongati intrusion is proposed.},
  author       = {Paredis, Bram and Muchez, Philippe and Dewaele, Stijn},
  issn         = {1374-8505},
  journal      = {GEOLOGICA BELGICA},
  keywords     = {mafic-ultramafic,layered intrusion,Karagwe-Ankole belt,LA-ICP-MS,NiS FA,pentlandite,mass balance,sulfur saturation,KARAGWE-ANKOLE BELT,MAFIC-ULTRAMAFIC INTRUSIONS,NIS FIRE-ASSAY,BUSHVELD COMPLEX,SOUTH-AFRICA,SULFIDE DEPOSITS,ICP-MS,SIDEROPHILE ELEMENTS,CHALCOPHILE ELEMENTS,GEOLOGICAL SAMPLES},
  language     = {eng},
  number       = {1-2},
  pages        = {15--32},
  title        = {Platinum group element mineralization at Musongati (Burundi) : concentration and Pd-Rh distribution in pentlandite},
  url          = {http://dx.doi.org/10.20341/gb.2016.018},
  volume       = {20},
  year         = {2017},
}

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