The head grade of the combined feed was 4 g/t PGE. Mineral
Liberation Analysis (MLA) results of the Overysel ore showed that
the main mineral present was enstatite (37%) with lesser alteration
silicates (22%) which were predominantly chlorite (10%)
with lesser serpentine (4%). The base metal sulphide content
was 2% and was predominantly pyrrhotite (39%) and pentlandite
(37%). The PGM distribution of the Overysel sample showed that
the main PGMs were PGE-tellurides (46%) with lesser PGE-alloys
(15%), PGE-arsenides (13%) and PGE-sulphides (13%).