In this study, nickeliferous soils' effects on grain legume and cereal growth as well their potential to accumulate nickel related micronutrients were examined. A completely randomized block design with six repetitions was set up. Samples collected from eight points the experiment conducted for weeks at University of Man. order fill a plastic container, soil samples used. The humidity controlle...

Abstract. Interaction between peridotite and pyroxenite-derived melts can significantly modify the mineralogy chemistry of upper mantle, enhancing its heterogeneity, by creating re-fertilized peridotites secondary-type pyroxenites. We experimentally investigated reaction a fertile lherzolite MgO-rich basaltic andesite produced partial melting an olivine-free pyroxenite at 2 GPa 1300–1450 ∘C. Th...

Abstract Mantle peridotites from the External Liguride Jurassic ophiolites (Northern Apennines, Italy) show diffuse occurrence of pyroxenite bands, recording melt migration and crystallization at lithosphere-asthenosphere boundary, during old, pre-Jurassic stages their subcontinental lithospheric mantle evolution. We present coupled microstructural geochemical study profiles across various type...

Evidence from iron meteorites indicates that a large number of differentiated planetesimals formed early in Solar System history. These bodies should have had well-developed olivine-rich mantles and consequentially such materials ought to be abundant both as asteroids and meteorites, which they are not. To investigate this “Great Dunite Shortage” we have undertaken a geochemical and oxygen isot...

Introduction: The HEDs make up the largest suite of crustal igneous rocks available from asteroids. Sili-cate clasts in the mesosiderite metal-silicate breccias are also dominated by crustal rocks that resemble the HEDs in many ways. Silicate petrology in both groups of meteorites range from strikingly similar fine-grained basalts to coarse grained orthopyroxenites. Mesosid-erites furthermore c...

Electrical conductivity of lherzolite (65% olivine), measured as a function of time after changes in the oxygen fugacity (fo2) of the surrounding CO2/CO atmosphere, is used to infer the diffusivity of the point defects responsible for conduction in olivine. A total of 63 equilibration runs at temperatures of 900, 1000, 1100, and 1200 C were fit using nonlinear parameter estimation to recover ti...

Lherzolite is one of the main units in the Ab-Bid ultramafic complex from Esfandagheh-HadjiAbad coloured mélange (South of Iran). The complex contains harzburgite, dunite, lherzolite and pyroxenite dykes and the lherzolites mainly occur in the margins. In the field, lherzolites occur as weakly foliated coarse-grained peridotites with shiny pyroxene grains and cut by neumerous pyroxenitic veins....

To explore the role of olivine grain size and crystal preferred orientation (CPO), on evolution microstructure mechanical behavior upper mantle rocks up to large strains, we performed axial extension experiments at 1200 °C, 300 MPa confining pressure, constant displacement rate leading strain rates ~10?5 s?1 three natural peridotites: a fine-grained mylonitic harzburgite with weak CPO two coars...