Micropits on volcanic glass shards:Laboratory simulation and possible origin

Huang, T. C. and Varner, J. R. and Wilson, L. (1980) Micropits on volcanic glass shards:Laboratory simulation and possible origin. Journal of Volcanology and Geothermal Research, 8 (1). pp. 59-68. ISSN 0377-0273

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Abstract

Submicrometer- to micrometer-sized pits are dominant features on volcanic glass shards derived from explosive eruptions and deposited in many deep-sea sediments and subaerial tuffs. The morphology of these pits and experimentally simulated pits and calculations of pressure fluctuations during or just after fragmentation in a magma chamber suggest the pits were formed by collision of volcanic particles, probably in the conduit system. The range of velocities calculated for the particles from the fragmentation of a magma clot, from a few tens up to 120 m/s, is very similar to the range found from the experimental results, 25–140 m/s. A collision with excess energy may reduce the particle size in a secondary fragmentation.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Volcanology and Geothermal Research
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1906
Subjects:
ID Code:
149049
Deposited By:
Deposited On:
16 Nov 2020 11:50
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Nov 2020 14:56