Iron oxides in nature take on different forms. „The most common iron oxide is hematite, Fe2O3, which is the end product of many geological processes and the main source of iron for our civilization,“ explains Bykova. During the past five years, however, scientists have discovered other iron oxides like Fe4O5, Fe5O6, and Fe13O19 that form at high pressures and temperatures. Investigating the beh...

Introduction. The Thermal Emission Spectrometer (TES) instrument aboard Mars Global Surveyor discovered several isolated deposits of gray, crystalline hematite in Sinus Meridiani, Aram Chaos, and Valles Marineris. A variety of formation mechanisms has been proposed for the martian hematite deposits [1-5], including aqueous and nonaqueous processes. Comparison of the average Sinus Meridiani hema...

The most frequent crystallographic preferred orientations developed during the progressive phase transformation of magnetite-hematite-goethite are described and analyzed in two natural samples banded iron formations from Carajás Mineral Province. Microtextures martitized grains containing three phases microplaty matrix were a scanning electron microscope equipped with detector for backscatter d...

Photon interaction effective atomic number (Z eff ) for partial as well as total photon interaction processes has been computed using logarithmic interpolation method for seven different concretes viz. (i) Ordinary, (ii) Hematite Serpentine, (iii) Ilmenite Limonite, (iv) Basalt magnetite, (v) Ilmenite, (vi) Steel scrap and (vii) Steel magnetite concrete in the wide energy range from 10.0 keV to...

This paper gives a critical review of all relevant, published works on the stratigraphy, tectonics, magmatism, metamorphism and metallogeny of the metamorphic complex of the Drina-Ivanjica Formation in eastern Bosnia-western Serbia. Special attention was paid to all unresolved or controversial issues in geology and metallogeny of this area. The basic controversial geological problem is the ques...

The research is aimed at study of the probable recovery iron from tailings Olcon mining company located in north-western Arctic zone Russia. Material composition a sample dump was analysed. authors have developed separation production technology to recover magnetite-hematite concentrate tailings. A processing flowsheet includes magnetic separation, milling and gravity concentration methods. pro...

The Neoproterozoic (1000–542 mol.yr ago) witnessed the dawn of Earth as we know it with modern-style plate tectonics, high levels of O2 in atmosphere and oceans and a thriving fauna. Yet, the processes leading to the fully oxygenation of the external envelopes, its exact timing and its link with the inner workings of the planet remain poorly understood. In some ways, it is a “chicken and egg” q...

intruduction: red beds have been widely studied by palaeomagnetic methods for what they can tell us about the history of sedimentary basins and their subsequent deformation (collinson, 1974, turner, 1979a,b and 1981, mccabe and elmore, 1989, elmor, et al., 1993 and 2000). this study has investigated the palaeomagnetism of the cambrian red sediments (dezou and dahou formation) of the eastern mar...