McGuinness of vesicular magma A theoretical model of the explosive fragmentation
نویسندگان
چکیده
References ml#ref-list-1 http://rspa.royalsocietypublishing.org/content/466/2115/731.full.ht This article cites 27 articles, 3 of which can be accessed free Subject collections (11 articles) volcanology Articles on similar topics can be found in the following collections Email alerting service here the box at the top right-hand corner of the article or click Receive free email alerts when new articles cite this article sign up in
منابع مشابه
A theoretical model of the explosive fragmentation of vesicular magma
Recent experimental work has shown that, when a vertical column of rock under large pressure is suddenly depressurized, the column can ‘explode’ in a structured and repeatable way. The observations show that a sequence of horizontal fractures forms from the top down, and the resulting blocks are lifted off and ejected. The blocks can suffer secondary internal fractures. This experiment provides...
متن کاملFragmentation of a porous viscoelastic material: Implications to magma fragmentation
[1] Fragmentation of vesicular magma by rapid decompression is one of the most likely triggers for explosive eruptions. In this phenomenon the decompression rate and the viscoelastic nature of magma are considered to be key factors. In order to obtain a clear idea on the effects of these two factors, controlled fragmentation experiments have been conducted. These experiments have three advantag...
متن کاملExplosive fragmentation criteria and velocities for vesicular magma
a r t i c l e i n f o We present a new criterion for primary fragmentation of natural rock samples in shock-tube experiments, and new formulae for the effective strength of natural rock samples, for the size of primary fragments, and for fragmentation velocities. These formulae and the fragmentation criterion are given in terms of the physical properties of the rock and in terms of experimental...
متن کاملInvestigation of the rock blast fragmentation based on the specific explosive energy and in-situ block size
The assessment of fragmentation through blasting and therefore subsequent crushing and grinding stages is important in order to control and optimize the mining operation. Prediction of the mean size of fragmented rock by the rock mass characteristics, the blasting geometry, the technical parameters and the explosive properties is an important challenge for the blasting engineers. Some of the ef...
متن کاملRHEOLOGICAL BEHAVIOR OF VESICULAR MAGMA The literature on magma rheology and strain localization focuses on the role of crys- tals in modifying the Newtonian magma rheol-
1023 ABSTRACT The rheology of twoor three-phase magmas has been the focus of much interest because it controls magma ascent and eruption behavior. Research on magma rheology has typically considered homogeneous fl ow. Here we demonstrate, based on natural examples, that strain resulting from viscous fl ow preceding explosive fragmentation localizes into shear zones at a microscopic scale. Strai...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009