Journal article
Mineralogy of the HSE in the subcontinental lithospheric mantle —An interpretive review
Lithos, Vol.372-373, Art. 105681
2020
Abstract
The highly siderophile elements (HSE: Os, Ir, Ru, Rh, Pt, Pd, Re, Au) exist in solid solution in accessory base-metal sulfides (BMS) as well as nano-to-micron scale minerals in rocks of the subcontinental lithospheric mantle (SCLM). The latter include platinum-group minerals (PGM) and gold minerals, which may vary widely in morphology, composition and distribution. The PGM form isolated grains often associated with larger BMS hosted in residual olivine, located at interstices in between peridotite-forming minerals or more commonly in association with metasomatic minerals (pyroxenes, carbonates, phosphates) and silicate glasses in some peridotite xenoliths. The PGM found inside residual olivine are mainly Os-, Ir- and Ru-rich sulfides and alloys. In contrast, those associated with metasomatic minerals or silicate glasses of peridotite xenoliths consist of Pt, Pd, and Rh bonded with semimetals like As, Te, Bi, and Sn. Nanoscale observations on natural samples along with the results of recent experiments indicate that nucleation of PGM is mainly related with the uptake of HSE by nanoparticles, nanominerals or nanomelts at high temperature (> 900 °C) in both silicate and/or sulfide melts, regardless of the residual or metasomatic origin of their host minerals. A similar interpretation can be assumed for gold minerals. Our observations highlight that nanoscale processes play an important role on the ore-forming potential of primitive mantle-derived magmas parental to magmatic-hydrothermal deposits enriched in noble metals. The metal inventory in these magmas could be related with the physical incorporation of HSE-bearing nanoparticles or nanomelts during processes of partial melting of mantle peridotite and melt migration from the mantle to overlying continental crust.
Details
- Title
- Mineralogy of the HSE in the subcontinental lithospheric mantle —An interpretive review
- Authors/Creators
- J.M. González-Jiménez (Author/Creator) - Universidad de GranadaS. Tassara (Author/Creator) - Yale UniversityE. Schettino (Author/Creator) - Consejo Superior de Investigaciones CientíficasJ. Roqué-Rosell (Author/Creator) - Universitat de BarcelonaJ. Farré-de-Pablo (Author/Creator) - Universitat de BarcelonaJ.E. Saunders (Author/Creator) - University of New EnglandA.P. Deditius (Author/Creator) - Murdoch UniversityV. Colás (Author/Creator) - Universidad Nacional Autónoma de MéxicoJ. J. Rovira-Medina (Author/Creator) - Universidad de GranadaM.G. Dávalos (Author/Creator) - Universidad Nacional Autónoma de MéxicoM. Schilling (Author/Creator) - Austral University of ChileA. Jiménez-Franco (Author/Creator) - Universitat de BarcelonaC. Marchesi (Author/Creator) - Universidad de GranadaF. Nieto (Author/Creator) - Universidad de GranadaJ.A. Proenza (Author/Creator) - Universitat de BarcelonaF. Gervilla (Author/Creator) - Universidad de Granada
- Publication Details
- Lithos, Vol.372-373, Art. 105681
- Publisher
- Elsevier
- Identifiers
- 991005545104307891
- Copyright
- © 2020 Elsevier B.V.
- Murdoch Affiliation
- Chemistry and Physics
- Language
- English
- Resource Type
- Journal article
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- 8 Earth Sciences
- 8.8 Geochemistry, Geophysics & Geology
- 8.8.1 Geochemical Petrogenesis
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