Now showing items 21-24 of 24

    Compositional and structural characterisation of Ni-phyllosilicates in hydrous silicate type Ni-laterite deposits 

    Villanova de Benavent, Cristina (Date of defense: 2015-12-11)

    Ni-bearing Mg-phyllosilicates (commonly known as garnierites) are significant ore minerals in many Ni-laterite deposits worldwide. However, the characterisation of these mineral phases is complex, as well as their ...

    Mineralogy and geochemistry of the platinum group elements (PGE), rare earth elements (REE) and scandium in nickel laterites 

    Aiglsperger, Thomas Hans (Date of defense: 2015-12-17)

    Ni laterites are considered worthy targets for critical metals (CM) exploration as rare earth elements (REE), Sc and platinum group elements (PGE) can be concentrated during weathering as a result of residual and secondary ...

    Caracterización del vulcanismo carbonatítico de Catanda (Angola) 

    Campeny, Marc (Date of defense: 2016-01-20)

    Las carbonatitas volcánicas de Catanda son las únicas descritas hasta el momento de carácter extrusivo en Angola. Esta localidad es, además, significativamente interesante por la presencia de lavas carbonatíticas, las ...

    Metalogenia de las carbonatitas en dominios plutónicos, subvolcánicos y volcánicos: Tchivira, Bonga y Catanda, Angola 

    Bambi, Aurora Cuaiela Joao Mateus (Date of defense: 2016-01-26)

    Se han seleccionado tres carbonatitas de la estructura tectónica de Lucapa en Angola representativas de diferentes niveles de emplazamiento de los magmas: plutónico (Tchivira), subvolcánico (Bonga) y volcánico (Catanda). Los ...