Special Issue "Highly Siderophile Elements and Their Isotopes in the Earth’s Mantle"
Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 2401
Interests: highly siderophile elements; mineralogy of platinum-group elements; radiogenic and stable isotope geochemistry, Ni-Cu-PGE sulfide deposits; ultramafic rocks; isotope composition of the Earth's mantle
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Absolute and relative abundances of the highly siderophile elements (HSE = PGE (Os, Ir, Ru, Rh, Pt, Pd), Re, Au) and their isotopes are important for geological, petrological, and geochemical investigations. Since Re and Os have strongly contrasting partitioning behavior during mantle melting and magma differentiation, the 187Re–187Os isotopic system is particularly useful in (i) distinguishing between crustal and mantle sources of the HSE and (ii) tracking melt extraction events, which can be applied at both the whole-rock and mineral (i.e., chromite, Ru-Os-Ir alloy, sulfide) scale. Further advances in mass spectrometry have allowed PGE alloys and sulfides to be dated using the 190Pt–186Os system. In order to gain further insights into large-scale geodynamic processes as well as the concentration of the HSE at the local scale, we invite contributions that use combined mineralogical, geochemical and isotopic studies, including the integration of whole-rock and mineral separate (via N-TIMS) and sub-grain scale (via LA-MC-ICPMS) Pt-Re-Os isotopic data from a selected set of rocks and robust minerals (e.g., chromite, PGE alloy) derived from various mantle domains. The latter may include, but are not limited to: komatiite systems, mantle xenoliths, abyssal peridotites, deep portions of ophiolite sections within the oceanic mantle, orogenic peridotite massifs, typical of subcontinental lithospheric mantle, and spatially associated PGE placer deposits.
Dr. Kreshimir N. Malitch
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- highly siderophile elements
- Re-Os and Pt-Os isotope systems
- high-precision negative thermal ionization mass-spectrometry
- in situ isotope analysis
- PGE alloy
- oceanic mantle
- subcontinental lithospheric mantle
- earth’s mantle