Magnetite (Fe3O4) is a commonly found in the environment and can form via several pathways, including biotic and abiotic reduction of Fe oxides and the oxidation of Fe and Fe. Despite extensive research, the redox behavior of magnetite is poorly understood. In previous work, the extent and kinetics of contaminant reduction by magnetite varied by several orders of magnitude between studies, two ...

In the Buchim porphyry copper deposit, we determined several representative rare mineral phases, comprising metals from gold-palladium group as well those bismuth-selenium (Cu-Bi-Se-Te-As) group. The phases are represented by new in bismuthinite, galenobismutite, krupkaite, friedrichite, emplectite, laitakarite and native bismuth of gold-palladium, including gold palladium with their elemental ...

The Southeast Missouri Iron Metallogenic Province in the Midcontinent USA contains seven major and several minor IOA/IOCG-type deposits a series of shallow vein-type deposits/prospects, all which are spatially temporally associated with early Mesoproterozoic (1500–1440 Ma) magmatism St. Francois Mountains terrane. One is Shepherd Mountain deposit, consists two northeast-trending ore veins domin...

Abstract The origins of Kiruna-type magnetite(-apatite) [Mt(-Ap)] deposits are contentious, with existing models ranging from purely hydrothermal to orthomagmatic end members. Here, we evaluate the compositions fluids that formed classic yet enigmatic Mt(-Ap) deposit at El Laco, northern Chile. We report evidence ore-stage minerals crystallized an Fe-rich (6–17 wt% Fe) sulfate melt. suggest a m...

Sintering accounts for about 50% of the total NOx emissions iron and steel industry. from sintering process can be simulated using coke combustion. However, generation emission law burning in pulverized coal is still not clear. The formation characteristics during combustion catalyzed by ore fines several iron-containing pure minerals were studied this paper. results showed that improve rate in...

Magnetite nanoparticles are redox active constituents of subsurface and corrosive environments. In this study, we characterized the aggregation and sedimentation behavior of well characterized magnetite nanoparticle clusters using dynamic light scattering (DLS), UV-vis-NIR spectroscopy, and small angle X-ray scattering (SAXS). Both unfunctionalized (NaOH-magnetite) and tetramethylammonium hydro...