RT Journal Article
T1 Partition behavior of platinum-group elements during the segregation of arsenide melts from sulfide magma
A1 Piña García, Rubén
A1 Gervilla, Fernando
A1 Helmy, Hassan
A1 Fonseca, Raúl O.C.
A1 Ballhaus, Chris
AB Evidence of immiscibility between arsenide and sulfide melts has been observed both in experimental studies and natural samples from several localities worldwide (e.g., Ronda, Spain; Beni Bousera, Morocco; Dundonald Beach South, Canada). Platinum-group elements (PGE) have shown to have a strong affinity for arsenide melts, but little is known about their partitioning behavior between arsenide and sulfide melts. In this study, we experimentally determine the partition coefficients of PGE (Pt, Pd, Ir, Ru, and Os) between both types of melt in As-saturated sulfide systems doped with trace amounts of PGE. Results show that all PGE display a strong preference to the arsenide melt with DAs/sulf meltsPGE ranging from 20 to 2700, with Ir and Pt showing a marked preference for arsenide melts. These partition coefficients values are similar to estimates made from natural samples and demonstrate that the separation of arsenide melts from sulfide magmas can be an efficient mechanism to scavenge PGE from magmas and to fractionate Os, Ru, and Pd from Pt and Ir.
PB Mineralogical Society of America
SN 0003-004X
YR 2020
FD 2020
LK https://hdl.handle.net/20.500.14352/7645
UL https://hdl.handle.net/20.500.14352/7645
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)
NO Deutsche Forchungsgemeinschaft
DS Docta Complutense
RD 19 mar 2026