Book chapter 20628 views
A Textural Perspective on the Magmatic System and Eruptive Behaviour of Merapi Volcano
Katie Preece 
,
Froukje van der Zwan,
Julia Hammer,
Ralf Gertisser
,
Froukje van der Zwan,
Julia Hammer,
Ralf Gertisser
Merapi Volcano, Pages: 265 - 289
Swansea University Author:
Katie Preece
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DOI (Published version): 10.1007/978-3-031-15040-1_9
Abstract
Quantitative textural analysis of crystals, including their number density, shapes, sizes, overall abundance and size distribution can be used to shed light on magmatic processes and the timescales over which they operate. At Merapi, textural analysis of phenocrysts in dome lavas, lava flows, tephra...
| Published in: | Merapi Volcano |
|---|---|
| ISBN: | 9783031150395 9783031150401 |
| ISSN: | 2195-3589 2195-7029 |
| Published: |
Cham
Springer International Publishing
2023
|
| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa62693 |
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| Abstract: |
Quantitative textural analysis of crystals, including their number density, shapes, sizes, overall abundance and size distribution can be used to shed light on magmatic processes and the timescales over which they operate. At Merapi, textural analysis of phenocrysts in dome lavas, lava flows, tephra, and in plutonic cumulates has revealed that open system steady state conditions prevail throughout the crustal magma plumbing system over short time periods, with non-steady state conditions prevailing over the longer term. Phenocryst crystallisation likely takes place over tens to hundreds of years prior to eruption. Quantitative textural analysis of feldspar microlites, in conjunction with compositional data, elucidate magma ascent and degassing processes within the conduit during dome forming eruptions, and additionally reveal the driving forces behind transitions between effusive and explosive eruptive behaviour. For example, microlite textures from different stages of the 2010 eruption show that transitions between explosive and effusive activity in 2010 were driven primarily by the dynamics of magma ascent in the shallow conduit. |
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| Keywords: |
Merapi; Quantitative textural analysis; Magmatic processes; Eruptive behaviour; Explosive-effusive eruption transition |
| College: |
Faculty of Science and Engineering |
| Start Page: |
265 |
| End Page: |
289 |