We studied the quality characteristics, chemical, mineral and isotope composition of nephrite, diopsidite rodingite Nyrdvomenshor nephrite deposit in Polar Urals. applied visual petrographic mineralogical studies, X-ray spectral fluorescence, ICP-MS analysis, a scanning electron microscope with dispersive microanalysis system, to measure oxygen composition. According its was substandard. Here, ...

Clinopyroxene bearing spinel harzburgites recovered from Cenozoic alkaline basalts the Kapsiki plateau were investigated with aim of understanding depletion and enrichment processes in subcontinental mantle below a major tectonic line. Concentrations trace elements (including H) determined in-situ olivine, orthopyroxene, clinopyroxene by EPMA, LA-ICP-MS FTIR. The xenoliths are refractory high o...