The Mt Weld lanthanide deposit in central Western Australia is considered to be one of the largest high grade deposits known in the world, first reported as a carbonate and phosphate rich ultramafic silicate intrusion that contained a resource of the Lanthanide series [1]. It has been dated between 1.6 – 2.0 billion years, where the formation of a carbonate layer in the cooling melt created a p...

some of vitamins and minerals in wheat, which exist in brain, are wasted in milling and do not enter into the flour. whey is especially rich in lactose, minerals and calcium phosphate. this deficit in bread can be compensated by whey to some extend. also whey can effectively postpone the staling of bread and improve the physicochemical properties of the bread. an attempt was made investigate th...

Microbial biofilms preferentially colonized pyrite surfaces of black shale incubated in groundwater in the Newark Basin (northeastern United States) for 1 month. SEM observation revealed the co-occurrence of bacteria-shaped pits and secondary iron minerals on pyrite, which indicate biological involvement in pyrite weathering and secondary solid formation. Of the 24 16S rDNA sequences obtained f...

An initial study of the minor element, trace element, and impurities in Corning archeological references glasses have been performed using three microbeam techniques: electron probe microanalysis (EPMA), laser ablation ICP-mass spectrometry (LA ICP-MS), and secondary ion mass spectrometry (SIMS). The EPMA results suggest a significant level of heterogeneity for a number of metals. Conversely, h...

Abstract The oxidative dissolution of sulfide minerals, naturally present in the subsurface, is one major pathways arsenic mobilization. This study investigates release and fate from arsenopyrite lollingite oxidation under dynamic redox conditions. We performed multidimensional flow-through experiments focusing on impact chemical heterogeneity mobilization reactive transport. In experimental se...

We have performed time-dependent photochemical calculations of CO selfshielding in the surface region of a turbulent nebula, and demonstrated that substantial mass-independent fractionation in bulk oxygen isotopes in the nebula was possible on timescales of 10 years. CO photodissociation in the presence of abundant H2 yields δvalues for nebular H2O with δO/δO near 1.0, consistent with measureme...

The accuracy of electron-probe microanalysis (EPMA) by wavelength-dispersive spectrometry (WDS) depends critically on spectrometer alignment, specimen positioning, pulse-height (PHA) discrimination, and deadtime correction, but also on the accurate measurement of characteristic x-ray intensities (i.e., “peak”) and continuum (i.e., “background”) which form the k-ratio that is converted by correc...

Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits. Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobil...

Abstract Core samples were collected from three wells, one onshore and two offshore, Qatar’s Upper Jurassic Arab D reservoir. The subjected to multiproxy petrographic chemical analyses identify their micro- nanoporosity types understand evolution destruction. Based on the petrophysical properties of studied rocks, succession was divided into seven rock types. Primary microporosity includes inte...

Twenty-one minerals are considered to be nutritionally essential, or probably essential, to the animal. Depending on the quantities required by the animal, they can be grouped into major minerals and trace (minor) elements. Of the major minerals the most important are calcium, phosphorus, sodium, chlorine, potassium, sulphur and magnesium. The important trace elements are copper, cobalt, iron, ...