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'Inheritance': An influence on the particle size of pyroclastic deposits
Citation
Carey, RJ and Houghton, BF, 'Inheritance': An influence on the particle size of pyroclastic deposits, Geology (Boulder), 38, (4) pp. 347-350. ISSN 0091-7613 (2010) [Refereed Article]
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Copyright Statement
Copyright 2010 Geological Society of America
DOI: doi:10.1130/G30573.1
Abstract
The size distribution of particles in pyroclastic fall deposits has been interpreted as a strong indication of efficiency of the fragmentation process during the parent explosions. Fall deposits, however, contain two distinct populations of pyroclasts: juvenile, i.e., magmatic clasts fragmented from the magma, and wall-rock particles derived from walls of the vent and volcanic conduit. While sizes and shapes of the former are always sensitive indicators of eruptive processes, properties of the wall-rock population may reflect various external influences. Here we describe how the wall-rock component of a powerful historical eruption largely inherited its size distribution from properties of the host rocks, and how this, in turn, strongly biases the entire deposit grain size distribution of the near-vent deposits. The use of wall-rock particles to infer style of fragmentation and eruption must always be coupled with other independent lines of evidence. © 2010 Geological Society of America.
Item Details
Item Type: | Refereed Article |
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Keywords: | Particle Size, Pyroclastic Deposits, Grain size, Explosive eruptions |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Volcanology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Carey, RJ (Associate Professor Rebecca Carey) |
ID Code: | 76571 |
Year Published: | 2010 |
Web of Science® Times Cited: | 14 |
Deposited By: | Earth Sciences |
Deposited On: | 2012-03-08 |
Last Modified: | 2012-07-03 |
Downloads: | 0 |
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