Formation des latérites nickélifères et mode de distribution des éléments du groupe du platine dans les profils latéritiques du complexe de Musongati, Burundi /

Evaluation of Platinum Group Elements (PGE) Potentials of Ultramafic Rocks of the Paleoproterozoic Nyong Series, Southeast Cameroon

“…The data show that PGE are relatively immobile under most conditions, with Pd showing the greatest mobility. Bandyayera (1997) reported that all PGEs are immobile during lowgrade metamorphism of ultramafic rocks, but Au, Pd, and to a lesser degree, Pt may be remobilized during lateralization. The similarity in PGEs concentration and inter-element ratios found in all the ultramafic rock samples in the Nyong Series suggest that the PGE patterns are of a primary nature.…”

An overview of nickel mineralisation in Africa with emphasis on the Mesoproterozoic East African Nickel Belt (EANB)

“…The Musongati intrusion is divided into a lower Ultramafic Zone and an upper Mafic Zone, each with two main subzones (Deblond, 1994;Bandyayera, 1997). The Ultramafic Zone comprises the Peridotitic and Pyroxenitic subzones, in which olivine and orthopyroxene are the main cumulus minerals respectively.…”

“…Euhedral chromite and anhedral interstitial sulphide grains also occur in minor amounts throughout. The Mafic Zone is subdivided into the lower Noritic and upper Gabbronoritic subzones, in which plagioclase becomes a major cumulus phase (Deblond, 1994;Bandyayera, 1997). Amphibole norite from the Mafic Zone at Musongati has been dated by SHRIMP analysis of zircons to 1374 ± 14 Ma by Tack et al (2010).…”

“…The olivine-rich rocks of the Peridotitic and Pyroxenitic Subzones described above are often pervasively altered to serpentine and magnetite along a reticulated fracture network (Bandyayera, 1997). The timing and abundance of this serpentinization is an important consideration for the depth and intensity of lateritization, as well as in exploration, when considering the direction and intensity of natural remnant magnetism of the rock.…”

Controls on the genesis and emplacement of komatiite-hosted Ni–Cu–PGE-sulphides at Albion Downs (Agnew-Wiluna Belt, Western Australia): a case study on the development of PGE lithogeochemical vectors to Ni–Cu–PGE-sulphide deposits

“…However, experimental work shows that PGE are relatively immobile under most conditions, with Pd and Pt showing the greatest mobility. 5,43,49 In order to compare observed geochemical variation with that expected from igneous processes, all analyses were filtered through the Pearce element plot. 10 Since most komatiite suites can be regarded as linear mixtures of olivine and liquid, most whole-rock compositions should fall on olivine control lines.…”