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Degassing and microlite crystallization during pre-climactic events of the 1991 eruption of Mt. Pinatubo, Philippines

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Degassing and microlite crystallization during pre-climactic events of the 1991 eruption of Mt. Pinatubo, Philippines; 1999; Article; Journal; Bulletin of Volcanology; Hammer, J. E.; Cashman, K. V.; Hoblitt, R. P.; Newman, S.

Summary

Dacite tephras produced by the 1991 pre-climactic eruptive sequence at Mt. Pinatubo display extreme heterogeneity in vesicularity, ranging in clast density from 700 to 2580 kg m-3. Observations of the 13 surge-producing blasts that preceded the climactic plinian event include radar-defined estimates of column heights and seismically defined eruptive and intra-eruptive durations. A comparison of the characteristics of erupted material, including microlite textures, chemical compositions, and H2O contents, with eruptive parameters suggests that devolatilization-induced crystallization of the magma occurred to a varying extent prior to at least nine of the explosive events. Although volatile loss progressed to the same approximate level [...]

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Type Scheme Key
local-index unknown 70021812
local-pk unknown 70021812
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1007/s004450050238
series unknown Bulletin of Volcanology

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citationTypeArticle
journalBulletin of Volcanology
languageEnglish
parts
typevolume
value60
typeissue
value5

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