A5066789644- Geological and Geochemical Analysis
- Mineralogy and Gemology Studies
- Geochemistry and Geologic Mapping
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
TU Bergakademie Freiberg
2021-2024
University of Atacama
2021
University of Antofagasta
2021
Abstract Portezuelo de Pajas Blancas' primary metasomatic deposits host sapphires that differ in size, colour, and colour distribution through different lithological units. The discovery of sapphire-bearing secondary aeolian placer enabled a detailed analysis sapphire types to determine the causes this heterogeneity. Representative single from were analysed using various techniques, including SEM-CL, OM-CL, Micro-XRF, Raman spectroscopy, polarised transmitted light multi-focus optical...
The Portezuelo de Pajas Blancas deposit, located in northern Chile, represents a unique opportunity to constrain unusual geological processes involved the genesis of sapphire-rich metasomatites central Andes. For this purpose, mapping was combined with conventional and high-resolution petrographic mineralogical analysis (light microscope, SEM-EDS automated mineralogy). Results demonstrate that uncommon occurrence is genetically related eight main lithological units host variable proportions...