The aim of the current paper is to map minerals mainly of Carpathian obsidian glasses by
nuclear microprobe based on the particle induced X-ray emission (PIXE) providing analytical …

… Obsidian is a dark volcanic glass originated by fast cooling of acidic lavas (65–75% SiO
2 ). (1) In the literature, most studies about obsidian are dedicated to the application of an …

… the term microphenocryst to emphasize our interpretation of these crystallites in the obsidian
glasses as subliquidus, presolidification crystals. In either type of rainbow obsidian, the …

… overlap the An#s of the experimental glasses in the study of Tomiya et al. (2010) (Fig. 5). …
Water contents are readily calculated in the phenocryst-poor obsidian samples in this study …

… phenocrysts and co-existing glass from the perlitic obsidian … Allanite/glass partition
coefficients show a smooth variation … allanite and glass of the Sandy Braes perlitic obsidian of …

… Crystallization of the glass was very sluggish in Shirataki obsidian owing to the high … is
provided by the thermal effect on the phenocrysts in the pyroclastic flow deposits. According to …

… phases in Glass Mountain lavas identifies conditions under which phenocrysts grew and the
… ) was collected from an outcrop of obsidian on the north side of Glass Mountain (Table 1; Fig…

… of the viscous obsidian. The glass (1G) that encloses these phenocrysts contains microlites
… of the other glasses. Microlites of aegirine are sparsely scattered throughout the pale-brown …

… Natural glasses such as obsidian, the most frequent vitreous material on the earth's
surface, were used by … The proportion of phenocrysts in quartz, feldspar and biotite is small. …

… -vesicular obsidian. The groundmasses in the interior of the lava is crystalline. Obsidian also
… -solid glass, perhaps in response to cooling contraction, extension, shear or a combination. …