The aim of this thesis is the investigation of the spectroscopic properties and the electronic structure of vanadium in minerals with a geological and/or technological interest. V K-edge HERFD-XAS experiments were combined with a theoretical determination of the measured spectra. Two approaches were complementary used to calculate the spectra: an ab initio approach and a multielectronic one. Th...

Quaternary magnetic studies have provided the conceptual framework to bridge magnetic studies into ancient systems. In cases where environmental materials have been subjected to diagenetic alteration two questions come to mind: 1) What part of the magnetic signal is preserved in the rocks; and 2) can the preserved signal be used to infer/identify magnetic patterns that are characteristic of the...

In this work, a bench-scale process was developed using mineral-processing methods to recover iron from a placer deposit located in Bardaskan, Khorasan-e-Razavi, Iran. The mineralogical studies were performed by X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Electron Probe Micro-Analyzer (EPMA), and an optical microscope. These studies indicated that titanomagnetite, magnetite, and hematite...

The submarine volcano 8.10, part of the South Iturup group underwater volcanoes Kuril island arc (KIA), was studied using a proven technology quantitative interpretation hydromagnetic survey materials in combination with echo sounding, continuous seismoacoustic profiling, and analysis petromagnetic properties chemical composition dredged rocks. makes it possible to interpret directly from origi...

Abstract Newly analysed titanomagnetite–ilmenite (Tim–Ilm) intergrowths from Martian nakhlite meteorite Northwest Africa (NWA) 5790 yielded crystallisation temperature up to 1032 °C and oxygen fugacity ( f O 2 ) ?QFM + 1.6, notably higher than previous estimates for magmas (temperature < 950 °C, = ? 0.5 1). To interpret how the magma was reduced we used D-Compress model sulphur degassing pro...