Kabanga magmatic nickel sulphide deposits, Tanzania: morphology and geochemistry of associated intrusions

Evans, David M.; Boadi, I.; Byemelwa, L.; Gilligan, Jon; Kabete, J.M.; Marcet, P.

doi:10.1016/s0899-5362(00)00044-0

Cited by 42 publications

(31 citation statements)

References 17 publications

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“…The shales are interbanded with thin siltstones, and also contain significant amounts of Fe-sulfide and graphite as irregular lenses (Evans et al, 2000).…”

Section: Regional Geologymentioning

confidence: 99%

“…Grey (1967) and Klerkx et al (1987) report that the depositional environment for these rocks is intracontinental extensional basin associated with early crustal thickening, followed by lithospheric mantle delamination and late-orogenic extensional collapse associated with basaltic magmatism (Evans et al, 2000). Syn, late-syn and post-orogenic granitoids, occupy a large area compared to that of the ultramafic rocks.…”

Section: Regional Geologymentioning

confidence: 99%

“…Regional geophysical surveys indicate the presence of some major structures, trending NE-SW. Repetition stratigraphy is thought to be associated with the event that gave rise to this regional fault-thrust belt (Rumvegeri, 1991;Evans et al, 2000).…”

Section: Regional Geologymentioning

confidence: 99%

“…Both the Kabanga Main and Kabanga North mafic-ultramafic rocks are crudely layered and differentiated, with cumulate olivine dominating the western part and gabbroic rocks dominating the eastern part, such that they young to the east (Evans et al, 2000).…”

Section: Mineralizationmentioning

confidence: 99%

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Application of lithogeochemistry to exploration for Ni–Cu sulfide deposits in the Kabanga area, NW Tanzania

Macheyeki

2011

Journal of African Earth Sciences

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“…The shales are interbanded with thin siltstones, and also contain significant amounts of Fe-sulfide and graphite as irregular lenses (Evans et al, 2000).…”

Section: Regional Geologymentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Mineralizationmentioning

confidence: 99%

See 2 more Smart Citations

Application of lithogeochemistry to exploration for Ni–Cu sulfide deposits in the Kabanga area, NW Tanzania

Macheyeki

2011

Journal of African Earth Sciences

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“…Therefore, the potential for mineralized mafic and ultramafic rocks can be argued to be more than 500 km long (Maier et al, 2008). A further description of the Tanzanian KM intrusions is given by Evans et al (2000).…”

Section: Introductionmentioning

confidence: 99%

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

Paredis¹,

Muchez²,

Dewaele³

2017

Geol. Belg.

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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.(see further; e.g. Robb, 2005;Kennedy et al., 2013;Kennedy, 2014). A second model is the sulfide fractionation model, which is based on physical and chemical processes where an immiscible sulfide liquid incorporates the major part of PGE (see further; e.g. Dare et al., 2010;Chen et al., 2015). A third, relatively newer model, proposed by e.g. Mungall et al. (2015) is that of flotation of sulfide melt on vapor bubbles, in which the PGE are incorporated during their way up. Knowledge about where and in which phase(s) the PGE occur is, therefore, essential to obtain an insight in the ore-forming processes and hence to assess their recovery from raw materials.In this paper, the results of the investigations for the concentration of PGE in mafic-ultramafic rocks and the Pd and Rh distribution in pentlandite from the Musongati intrusion in Burundi will be discussed. The results are based on whole rock and sulfide phase analyses that were incorporated into a mass balance to calculate the Pd and Rh distribution. Based on these data a preliminary model for the PGE mineralization of the Musongati intrusion is proposed.

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The Kabanga Ni sulfide deposit, Tanzania: I. Geology, petrography, silicate rock geochemistry, and sulfur and oxygen isotopes

et al. 2010

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Kabanga magmatic nickel sulphide deposits, Tanzania: morphology and geochemistry of associated intrusions

Cited by 42 publications

References 17 publications

Application of lithogeochemistry to exploration for Ni–Cu sulfide deposits in the Kabanga area, NW Tanzania

Application of lithogeochemistry to exploration for Ni–Cu sulfide deposits in the Kabanga area, NW Tanzania

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

The Kabanga Ni sulfide deposit, Tanzania: I. Geology, petrography, silicate rock geochemistry, and sulfur and oxygen isotopes

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