Abstract：
:We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Paredes-Mariño J,Dobson KJ,Ortenzi G,Kueppers U,Morgavi D,Petrelli M,Hess KU,Laeger K,Porreca M,Pimentel A,Perugini Ddoi
10.1038/s41598-017-17098-3subject
Has Abstractpub_date
2017-12-04 00:00:00pages
16897issue
1issn
2045-2322pii
10.1038/s41598-017-17098-3journal_volume
7pub_type
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