Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"Banded iron formations"”.
-
Interactions of Fe(II) with the iron oxidizing bacterium Rhodopseudomonas palustris TIE-1
Microbial anaerobic iron oxidation has long been of interest to biologists and geologists, both as a possible mechanism for the creation of banded iron formations before the rise of oxygen, and as a model system for organisms able to accept electrons from an external, inorganic source. Previous …
-
The sedimentology, geochemistry and diagenesis of West Rand Group sediments in the Heidelberg area, Transvaal
… probable, equivalent modern day depositional environment. The extent of diagenesis and metamorphism was investigated by using two white mica techniques. The chemistry of the shales was related to its mineralogy and a detailed study of the geochemical profile below the West Rand/Central Rand …
-
Iron in oxides, silicates and alloys under extreme pressure-temperature conditions
… sites and the evolution the spin state of ferric iron, as one of crucial parameters determining electrical and radiative conductivity of the Earth's lower mantle. We perform single-crystal x-ray diffraction on magnesium silicate perovskite with the composition Mg0.63Fe0.37Si0.63Al0.37O3 (MgFeAlPv) …
-
Single-crystal X-ray diffraction at extreme conditions in mineral physics and material sciences
… structural studies of a number of high-pressure iron oxides, which allowed us to resolve some of decade-long controversies. This work has led to discovery of new phases including a mixed iron oxide Fe5O7 with an unusual stoichiometry. One of the focuses of my research was investigation of the …
-
Compositions, logratios and geostatistics: An application to iron ore
… blast cuttings analyses drawn from a producing iron ore mine in Western Australia. Previous studies using the high spatial density blast hole data and compositional geostatistical approach returned encouraging results, results other practitioners suggested were due to the high spatial density. …