Controls on conduit magma flow dynamics during lava dome building eruptions
نویسندگان
چکیده
منابع مشابه
Volcanic Eruptions: Cyclicity During Lava Dome Growth
Glossary andesite magma or volcanic rock is characterised by intermediate SiO2 concentration. Andesite magmas have rheological properties that are intermediate between basalt and rhyolite magmas. Silica content in andesites ranges from approximately 52 to 66 weight percent. Common minerals in andesite include plagioclase, amphibole and pyroxene. Andesite is typically erupted at temperatures bet...
متن کاملPeriodic behavior in lava dome eruptions
Lava dome eruptions commonly display fairly regular alternations between periods of high activity and periods of low or no activity. The time scale for these alternations is typically months to several years. Here we develop a generic model of magma discharge through a conduit from an open-system magma chamber with continuous replenishment. The model takes account of the principal controls on f...
متن کاملControl of magma flow in dykes on cyclic lava dome extrusion
[1] Lava dome eruptions are commonly characterized by large fluctuations in discharge rate with cyclic behaviour on time-scales ranging from hours to decades. Examples include Bezymianny volcano (Russia), Merapi (Java), Santiaguito (Guatemala), Mt St Helens (USA), Mt Unzen (Japan), and Soufrière Hills volcano (Montserrat). Previous models have assumed simple cylindrical conduits for magma trans...
متن کاملLava Flows during Basaltic Eruptions
12 Observations in the USA, Iceland, and Tenerife, Canary Islands, reveal how processes occurring 13 during basaltic eruptions can result in complex physical and stratigraphic relationships between lava 14 and proximal tephra fall deposits around vents. Observations illustrate how basaltic lavas can 15 disrupt, dissect (spatially and temporally) and alter sheet-form fall deposits. Complexity ar...
متن کاملUnderstanding Dome-building Eruptions: a Rheological and Acoustic Study
iv v […] and Pachamama trembled, for long it roar and longer it went on, and before exhaustion, fire slit its throat and cinders went tumbling down the slopes of Tungurahua; I was high up, over there, and saw everything Later it settled… …the next day, the riders stormed by and stirred it all again. We can look at the photographs later […]-telltale of a friend who witness the August 2006 erupti...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2005
ISSN: 0148-0227
DOI: 10.1029/2004jb003183