Strong explosive eruptions of volcanoes throw out mixtures of gases and ash from high-
pressure underground reservoirs. Investigating these subsurface reservoirs may help to …

Active volcanic fumaroles are one of the most spectacular natural objects in terms of mineral
diversity. The Great Tolbachik Fissure Eruption (GTFE)(Kamchatka) fumaroles are renowned …

Cristobalite is a low-pressure, high-temperature SiO2 polymorph that occurs as a metastable
phase in many geologic settings, including as crystals deposited from vapor within the pores …

We used petrological data on samples of the December 20th, 2017 eruption of the
Bezymianny volcano (Kamchatka, Russia) to investigate the evolution of the magmatic …

Low-pressure silica polymorphs, eg quartz (Qtz), tridymite (Trd), and cristobalite (Crs), are
common in silicic magmas, but the conditions of their formation are still unclear. The stability …

Microorganisms in extreme volcanic environments play an important role in the development
of plants on newly exposed substrates. In this work, we studied the structure and diversity of …

This paper provides information on the 2022 eruptive activity of Ebeko Volcano. Phreatic
explosions had been occurring in the crater lake from January 22 to June 13 due to water …

Explosive eruptions at steep-sided volcanoes may develop with complex precursor activity
occurring in a poorly-understood magma plumbing system so that timelines and possible …

The study of silica polymorphs in impactites is important for determining the pressure and
temperature of impact rock formation. Silica modifications in impact melt rocks of the …

Experimental studies increasingly often report low-temperature (200–800° C) and low-
pressure (0.05–3 kbar) hydrosilicate fluids with> 40 wt.% of SiO2 and> 10 wt.% of H2O …