The Eocene Huber Formation, exposed in the CFI Hall mine south of Irwinton, in Wilkinson County, Georgia, displays colored zones that are a consequence of an oxidative weathering front. These zones vary from very light gray (gray) to pinkish white (pink) to very pale yellow (cream) (Munsell N8, 5YR 8/2 and 2.5Y 8/2, respectively) with increasing degree of oxidation. A representative sample from...

Newly determined ilmenite-melt and orthopyroxene-melt partition coefficients are used to construct quantitative forward models of the evolution of high field strength element (HFSE, Zr, Nb, Hf, Ta, Th, U) and rare earth element (REE: Nd, Sm, Lu) concentrations during crystallisation and subsequent remelting of the Lunar Magma Ocean (LMO). Crystallisation models suggest that the initial LMO must...

Abstract In terrestrial magmas titanium is predominantly tetravalent (Ti 4+ ), in contrast, lunar are more reduced (IW-1) and hence approximately 10% of their bulk Ti content trivalent 3+ ). Changes oxidation state coordination number both important parameters that can serve to drive stable isotope fractionation. As such, mineral–mineral mineral-melt fractionation factors determined for samples...

Two oxygen carriers were tested with respect to chemical looping combustion (CLC) and gasification (CLG). Ilmenite, a natural ore composed mainly of iron–titanium oxide, LD Slag, an iron-based industrial waste, investigated at 850 900 °C in continuous operation 0.3 kW chemical-looping reactor system using synthetic biomass volatiles as fuel. CLC CLG conditions simulated the fuel by changing flo...

Models for the evolution of the Moon must explain a number of important characteristics of its magmatic history. Primary among them is the emplacement of mare basalts primarily on one side of the Moon, and in a region of the surface roughly correlating with that containing high subsurface concentrations of KREEP. It is thus important to explore mechanisms which will regionally concentrate a KRE...

Abstract The textures and geochemical characteristics of the rocks in layered intrusions potentially provide insights into physicochemical processes that have taken place mafic magma chambers. Diverse exsolution Fe-Ti oxides may record variation subsolidus temperature oxygen fugacity (fO2) cooling Here we investigated ilmenitehematite solid solution (Ilmss) relationships evident preserved inter...

We report the ground state magnetic structure and in-field magnetostrictive effects of $\mathrm{Ni}\mathrm{Ti}{\mathrm{O}}_{3}$ studied by means zero-field single-crystal neutron diffraction, magnetization, high-resolution dilatometry experiments. Zero-field diffraction on single crystals confirms an easy-plane antiferromagnet with a multidomain state. Upon application external fields, shows ev...