Filiuță Andra-Elena

Geological Institute of Romania | IGR · Mineralogy

Rock forming blue quartz occurrences are reported on all continents, but little is known about the specific causes for the coloration, and even less about its geological significance. The present study investigates the occurrence hosted by the metarhyolites of the Rio dos Remédios Group in order to determine the potential causes of the blue colorat...

The blue quartz of the Albești metagranite is an interesting and puzzling occurrence in the Romanian geological landscape, both in terms of rarity and available data. The body of literature on blue quartz attributes the color to the Rayleigh/Tyndall scattering of light by nanometer/submicron inclusions, commonly identified as ilmenite or rutile, an...

Abstract. Blue quartz occurs in a variety of geological settings worldwide and its colour is often produced through the Rayleigh scattering of light off nanometre size mineral inclusions with uncertain identity. Despite this fact, dedicated mineralogical studies on the topic are few and most references mention only the location and inferred causes...

Two blue quartz occurrences from Romania have been investigated using optical microscopy, XRD, FT-IR, TGA/DTA and SEM. The results produced are preliminary in nature and point to a coloration caused by the scattering of light by nano meter size, temperature sensitive inclusions.

The Albeşti granite, of Early Ordovician age, was formed by crustal anatexis, experienced a medium temperature and medium-to-high pressure metamorphic event and is now hosted by the crystalline formations of the Leaota Mountains (South Carpathians), where it forms stratigraphically concordant lenses. Its most striking feature, similar to other Euro...

The Early Ordovician Albești Granite was formed by crustal anatexis, experienced a medium temperature and medium to high pressure metamorphic event and is now hosted by the crystalline formations of the Leaota Mts. (South Carpathians) where it forms stratigraphically concordant lenses. Its most striking feature, similar to other European granites o...