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Title: Magmatic volatiles in explosive rhyolitic eruptions

Abstract

Obsidian clasts in rhyolitic tephra deposits preserve preeruption magmatic volatile contents, providing a direct means for determining the volatile content of explosively erupted magmas. Small to moderate volume Plinian eruptions (10/sup -3/ to 10/sup -1/ km/sup 3/) appear to be driven by 0.5--1.0 wt.% volatiles, consisting dominantly of H/sub 2/O with minor CO/sub 2/. Analysis of obsidian from eruptive sequences consisting of tephra and flows indicates that this hydrous magma abruptly overlies magma with only 0.1--0.2 wt.% H/sub 2/O.

Authors:
;
Publication Date:
Research Org.:
Sandia National Laboratories, Albuquerque, NM 87185
OSTI Identifier:
5476604
Resource Type:
Journal Article
Journal Name:
Geophys. Res. Lett.; (United States)
Additional Journal Information:
Journal Volume: 8:7
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; VOLCANISM; MAGMA; VOLCANIC GASES; INTRUSION; LAVA; MAGMATISM; RHYOLITES; FLUIDS; GASES; IGNEOUS ROCKS; ROCKS; VOLCANIC ROCKS; 580202* - Geophysics- Volcanology- (1980-1989)

Citation Formats

Eichelberger, J C, and Westrich, H R. Magmatic volatiles in explosive rhyolitic eruptions. United States: N. p., 1981. Web. doi:10.1029/GL008i007p00757.
Eichelberger, J C, & Westrich, H R. Magmatic volatiles in explosive rhyolitic eruptions. United States. https://doi.org/10.1029/GL008i007p00757
Eichelberger, J C, and Westrich, H R. 1981. "Magmatic volatiles in explosive rhyolitic eruptions". United States. https://doi.org/10.1029/GL008i007p00757.
@article{osti_5476604,
title = {Magmatic volatiles in explosive rhyolitic eruptions},
author = {Eichelberger, J C and Westrich, H R},
abstractNote = {Obsidian clasts in rhyolitic tephra deposits preserve preeruption magmatic volatile contents, providing a direct means for determining the volatile content of explosively erupted magmas. Small to moderate volume Plinian eruptions (10/sup -3/ to 10/sup -1/ km/sup 3/) appear to be driven by 0.5--1.0 wt.% volatiles, consisting dominantly of H/sub 2/O with minor CO/sub 2/. Analysis of obsidian from eruptive sequences consisting of tephra and flows indicates that this hydrous magma abruptly overlies magma with only 0.1--0.2 wt.% H/sub 2/O.},
doi = {10.1029/GL008i007p00757},
url = {https://www.osti.gov/biblio/5476604}, journal = {Geophys. Res. Lett.; (United States)},
number = ,
volume = 8:7,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1981},
month = {Wed Jul 01 00:00:00 EDT 1981}
}