57FeM¨ossbauer spectroscopy has provided precise and accurate iron redox ratios Fe2+/Fe3+ in ilmenite, FeTiO3, found within kimberlite samples from the Catoca and Camatxia kimberlite pipes from N.E. Angola. Ilmenite is one of the key indicator minerals for diamond survival and it is also one of the iron-bearing minerals with iron naturally occurring in one or both of the oxidation states Fe3+ and Fe2+. For this reason it is a good indicator for studying oxygen fugacities (fO2) in mineral samples, which can then be related to iron redox ratios, Fe2+/Fe3+. In this paper we demonstrate that the oxidation state of the ilmenite mineral inclusion from sampled kimberlite rock is a key indicator of the oxidation state of the host kimberlite...
Seguela kimberlites are characterized by xenocrysts chromites with elevated contents of TiO2 (0.6-5%...
Garnets in xenoliths from the Wesselton kimberlite show significant zoning in major and trace elemen...
Iron speciation is one of the most widely applied proxies used to reconstruct oxygen levels and redo...
Diamonds are formed at high pressure, temperature and low oxygen fugacity conditions in the Earth's ...
Conventional diamond exploration seldom involves searching for diamonds in rock and soil samples; ra...
Oxygen fugacity (fO2) is a fundamental but little known intensive variable in mantle processes. It i...
sequences have been studied by M6ssbauer spectroscopy and chemical methods. Kimmeridge Clay Formatio...
The element Fe and Fe-bearing minerals occur ubiquitously throughout the field of astrobiology. Cycl...
The oxidation state of iron in Earth’s mantle is well known to depths of approximately 200 km, but h...
P-T- Oxygen fugacity (fO2) conditions and fluid compositions were estimated for the formation condit...
Ti-rich minerals occur in xenoliths of metasomatized mantle peridotites, MARID and PIC. Xenocrysts p...
The oxidation state of Fe in garnets in a garnet peridotite xenolith from the Wesselton kimberlite (...
The redox conditions of the Earth’s upper mantle are generally constrained through the use of oxy-th...
The oxidation states of Fe within olivine, orthopyroxene, clinopyroxene, and spinel in a spinel lher...
This study presents results of the initial phase of the research project, "Kimberlites associated to...
Seguela kimberlites are characterized by xenocrysts chromites with elevated contents of TiO2 (0.6-5%...
Garnets in xenoliths from the Wesselton kimberlite show significant zoning in major and trace elemen...
Iron speciation is one of the most widely applied proxies used to reconstruct oxygen levels and redo...
Diamonds are formed at high pressure, temperature and low oxygen fugacity conditions in the Earth's ...
Conventional diamond exploration seldom involves searching for diamonds in rock and soil samples; ra...
Oxygen fugacity (fO2) is a fundamental but little known intensive variable in mantle processes. It i...
sequences have been studied by M6ssbauer spectroscopy and chemical methods. Kimmeridge Clay Formatio...
The element Fe and Fe-bearing minerals occur ubiquitously throughout the field of astrobiology. Cycl...
The oxidation state of iron in Earth’s mantle is well known to depths of approximately 200 km, but h...
P-T- Oxygen fugacity (fO2) conditions and fluid compositions were estimated for the formation condit...
Ti-rich minerals occur in xenoliths of metasomatized mantle peridotites, MARID and PIC. Xenocrysts p...
The oxidation state of Fe in garnets in a garnet peridotite xenolith from the Wesselton kimberlite (...
The redox conditions of the Earth’s upper mantle are generally constrained through the use of oxy-th...
The oxidation states of Fe within olivine, orthopyroxene, clinopyroxene, and spinel in a spinel lher...
This study presents results of the initial phase of the research project, "Kimberlites associated to...
Seguela kimberlites are characterized by xenocrysts chromites with elevated contents of TiO2 (0.6-5%...
Garnets in xenoliths from the Wesselton kimberlite show significant zoning in major and trace elemen...
Iron speciation is one of the most widely applied proxies used to reconstruct oxygen levels and redo...