We present a novel approach to use zircon as correlation tool well monitor for magma reservoir processes in silicic volcanic systems. Fingerprinting eruption products based on trace element content and U-Pb dates of offers promising, previously underestimated tephra perspective, particularly cases where the main minerals glass are altered. Using LA-ICP-MS analyses, rapid cost-effective method, ...

the study area is located at northwest of sarbisheh in south khorasan province and eastern border of lut block. in this area, tertiary (eocene-oligocene to pliocene) volcanic rocks consisting of basaltic andesite, dacite, rhyodacite, vitreous rhyolite (perlitic in some parts), tuff and ignimbrite are exposed. in the daghar mountain, a, b and c perlite layers with thicknesses of 102, 7 and 58 me...

BACKGROUND The eruptions of Eyjafjallajökull (2010) and Grímsvötn (2011), Iceland, triggered immediate, international consideration of the respiratory health hazard of inhaling volcanic ash, and prompted the need to estimate the potential hazard posed by future eruptions of Iceland's volcanoes to Icelandic and Northern European populations. METHODS A physicochemical characterization and toxic...

Spherulites are spherical clusters of radiating crystals that occur naturally in rhyolitic obsidian. The growth of spherulites requires diffusion and uptake of crystal forming components from the host rhyolite melt or glass, and rejection of non-crystal forming components from the crystallizing region. Water concentration profiles measured by synchrotron-source Fourier transform spectroscopy re...

The eruptive products of the last 1000 years at La Fossa volcano on island Vulcano (Italy) are characterized by abrupt changes chemical composition that span from latite to rhyolite. wide variety textural features these has given rise several petrological models dealing with mingling/mixing processes involving mafic-intermediate and rhyolitic magmas. In this paper, we use published whole-rock d...