Eruptive shearing of tube pumice: pure and simple

Dingwell, Donald B.; Lavallée, Yan; Hess, Kai-Uwe; Flaws, Asher; Marti, Joan; Nichols, Alexander R. L.; Gilg, H. Albert; Schillinger, Burkhard

doi:https://doi.org/10.5194/se-7-1383-2016

Articles | Volume 7, issue 5

https://doi.org/10.5194/se-7-1383-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/se-7-1383-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 7, issue 5

Research article

|

27 Sep 2016

Research article |

| 27 Sep 2016

Eruptive shearing of tube pumice: pure and simple

Donald B. Dingwell, Yan Lavallée, Kai-Uwe Hess, Asher Flaws, Joan Marti, Alexander R. L. Nichols, H. Albert Gilg, and Burkhard Schillinger

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Final revised paper (published on 27 Sep 2016)
Supplement to the final revised paper
Preprint (discussion started on 03 Nov 2015)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C1443: 'Comments on manuscript SE-2015-78 by Dingwell D.B. and co-authors', Anonymous Referee #1, 30 Nov 2015
RC C1498: 'Review', Anonymous Referee #2, 06 Dec 2015
AC C2052: 'Final Response', Yan Lavallée, 18 Apr 2016

Short summary

Here, we use tomography to reconstructed the pores of erupted pumice and understand the evolution of gas bubbles in magma. Analysis of the pore geometry is used to describe whether the pores where aligned by stretching as ascending magma is pulled apart (pure shear) or sheared like a deck of card (simple shear). We conclude that the latter, simple shear, dominates during magma ascent up to the points where magma fragments to cause an explosion.