Abstract Base metal sulfides (Fe–Ni–Cu–S) are ubiquitous phases in mantle and subduction-related lithologies. Sulfides the often melt incongruently, which leads to production of a Cu–Ni-rich sulfide leaves solid residue called monosulfide solution (mss). However, persistence crystalline like mss Earth’s at higher temperatures pressures deep within Earth has long been up for debate, as presence ...

Theorem (Generalized Dirichlet Density). Let f : Y → X be a generically finite and Galois morphism of integral separated schemes of finite type over Z. Let K and L denote the function fields of X, respectively Y , and let G := Gal(L|K) be the group of (rational) automorphisms of Y over X. Then the following hold: 1) There exists an open sub-scheme U ⊂ X such that f is étale above U , and if V =...

Introduction: NASA's Stardust spacecraft collected the first particles clearly identified a originating on a specific comet, 81P/Wild 2, and delivered them to Earth for examination. Prior to the Stardust collection it had been suggested that some chondritic porous in-terplanetary dust particles (CP IDPs) collected from the Earth's stratosphere were from comets, based on the degree of heating ex...

Abst rac t -This study investigates the effects of variations in the fugacities of oxygen and sulfur on the partitioning of first series transition metals (V, Cr, Mn, Fe, Co, Ni, and Cu) and W among coexisting sulfide melt, silicate melt, and olivine. Experiments were performed at 1 atm pressure, 1350°C, with the fugacities of oxygen and sulfur controlled by mixing CO2, CO, and SO2 gases. Start...

The Ildeus mafic–ultramafic complex represents plutonic roots of a Triassic magmatic arc tectonically emplaced into the thickened uppermost crust beneath Mesozoic Stanovoy collided margin. cumulates host Ni-Co-Cu-Pt-Ag-Au sulfide-native metal-alloy mineralization produced through differentiation subduction-related primary mafic melt. This melt was sourced in metal-rich sub-arc mantle wedge hybr...

Cette étude est l " ébauche d " un ensemble d " éléments susceptibles de déboucher sur l " élaboration d " une Théorie Générale des Réseaux en Phase d'Apprentissage. Elle s " inspire un peu du formalisme utilisé en Mécanique quantique dans le Modèle Standard (Théories de jauge, invariance sous des transformations de symétrie,…). Conscient que nous n " avons fait qu " effleurer le sujet, nous se...