Abstract
This work is devoted to the study of one of the largest caldera eruptions of the Kurile-Kamchatka island-arc system that occurred on the island of Iturup. The object of investigation of this work are phenocrysts of quartz and plagioclase from dacite pumice of the Isthmus of the Isthmus, which is located on the island of Iturup. The purpose of this work is to determine the water content in the melts that participated in the caldera eruption of the Vetrovoy Isthmus and the patterns of their changes during the crystallization of magma. In the course of the work, the following were carried out: 1) adaptation and calibration of the Raman spectroscopy method for determining water in rhyolite melt’s inclusions glasses in quartz and plagioclase from pumice stone; 2) determination of composition and estimation of water content in melt inclusions in quartz and plagioclase according to x-ray spectral analysis; 3) establishment of the regularities of the change in the water content during the evolution of the magmatic melt; 4) evaluation of fluid pressure by comparison with experimental data
Highlights
Catastrophic eruptions, such as Santorin [1], Toba [2,3], Pinatubo [4], etc., are usually associated with reservoirs of acid magmas with a high content of volatile components
Graben is filled with late Pleistocene pumice-pyroclastic deposits with a thickness of more than 260 meters and a volume of about 100 km3 [6,7]
The results showed that the melts of the caldera eruption of the Vetrovoy Isthmus contained water close to saturation for magmas of dacite and rhyolite composition
Summary
Catastrophic eruptions, such as Santorin [1], Toba [2,3], Pinatubo [4], etc., are usually associated with reservoirs of acid magmas with a high content of volatile components. The Vetrovoy Isthmus (VI) is 12 km wide graben depression in the northern part of the Iturup Island of the Kurile island arc. Graben is filled with late Pleistocene pumice-pyroclastic deposits with a thickness of more than 260 meters and a volume of about 100 km3 [6,7]. It is presumed that the eruptive center is located approximately in the middle of the isthmus.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Earth and Environmental Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
