Distribution of platinum-group elements in pristine and near-surface oxidized Platreef ore and the variation along strike, northern Bushveld Complex, South Africa

X-ray Photoelectron Spectroscopy (XPS) Study of the Products Formed on Sulfide Minerals Upon the Interaction with Aqueous Platinum (IV) Chloride Complexes

“…Platinum-group elements (PGEs) are widely used in various areas, first of all in catalysis; their chalcogenides are also of interest for electrocatalysis [1][2][3]. The increasing industrial demand for PGEs and their limited natural sources require the investigation of the genesis of PGE ores and new approaches to the recovery technologies [4], secondary processes and environmental behavior of engineered PGE species [5,6]. Platinum-group element ores are mainly associated with ultramafic-mafic rocks and, little is known about the interaction of Pt-bearing aqueous solutions with sulfide minerals [7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

“…The aim of this study to investigate the chemical species of Pt formed on the surface of sulfide minerals, including the preliminarily oxidized ones, upon their contact with aqueous Pt(IV)-chloride complexes. This knowledge is important for understanding processes leading to the loss of PGEs in the processing of sulfide ores, affinage, and the behavior of PGEs in tailing ponds where they are leached under near-surface conditions [5,6]. The interaction of metal sulfides with the solutions of Pt-containing complex compounds is of interest for preparation of composite nanomaterials and their potential use in (electro)catalysis, electronics [1-3].…”

The mineralogy and mineral associations of platinum-group elements and precious metals in the Aurora Cu-Ni-Au-PGE deposit, Northern Limb, Bushveld Complex

“…The mineralisation at Aurora has been mapped as being in the Main Zone (Van Der Merwe, 1976), with the mineralisation described as a narrow belt close to the floor of the RLS hosted by gabbronorites. The Aurora project has been described by Harmer et al (2004), Maier et al (2008), Manyeruke (2007 and McDonald and Harmer (2010), with some compositional data of PGM from Nonnenwerth presented in Junge et al (2018). While Manyeruke (2007), Maier et al (2008) and Junge et al (2018) (Ashwal et al, 2005;McDonald et al, 2017).…”

“…The Aurora project has been described by Harmer et al (2004), Maier et al (2008), Manyeruke (2007 and McDonald and Harmer (2010), with some compositional data of PGM from Nonnenwerth presented in Junge et al (2018). While Manyeruke (2007), Maier et al (2008) and Junge et al (2018) (Ashwal et al, 2005;McDonald et al, 2017). McDonald et al (2017) proposed that the sulphide mineralisation in Aurora was formed by the separation of sulphide liquid from Upper Main Zone magma, with sulphide saturation achieved through fractional crystallisation.…”

“…9, McCreesh et al, 2018). The PGM at Nonnenwerth are also dominated by bismuthotellurides, although with a larger proportion of Pt-rich PGM (Junge et al, 2018).…”