Transmission electron microscopic study of the immiscibility in natural and synthetic rhyolitic glasses

Details Transmission electron microscopic study of the immiscibility in natural and synthetic rhyolitic glasses Transmission electron microscopic study of the immiscibility in natural and synthetic rhyolitic glasses

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..79..168m&link_type=abstract

Earth and Planetary Science Letters, Volume 79, Issue 1-2, p. 168-178.

Computer Science

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Scientific paper

Transmission electron microscopy of nuée ardente scoriae from the Soufrière, St. Vincent, 1979 eruption has revealed the existence of immiscibility at the scale of 300-900 Å. Similar phase separation was reproduced in a synthetic glass with the same composition and the miscibility gap was approximately determined. From these results and the analysis of the natural phase-separated glass, the maximum temperature of the magma prior to the eruption was estimated.
A crude model of the immiscibility, based on Flory's model for polymer solutions, is proposed. It reproduces fairly well the experimentally observed miscibility gap.

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