Journal article
The isotopic and chemical evolution of Mount St. Helens
Abstract
Isotopic and major and trace element analysis of nine samples of eruptive products spanning the history of the Mt. St. Helens volcano suggest three different episodes; (1) 40,000–2500 years ago: eruptions of dacite with εNd = +5, εSr = −10, variable δ18O,206Pb/204Pb ∼ 18.76, Ca/Sr ∼ 60, Rb/Ba ∼ 0.1, La/Yb ∼ 18, (2) 2500-1000 years ago: eruptions of basalt, andesite and dacite with εNd = +4 to +8, εSr = −7 to −22, variable δ18O (thought to …
Authors
Halliday AN; Fallick AE; Dickin AP; Mackenzie AB; Stephens WE; Hildreth W
Journal
Earth and Planetary Science Letters, Vol. 63, No. 2, pp. 241–256
Publisher
Elsevier
Publication Date
May 1983
DOI
10.1016/0012-821x(83)90040-7
ISSN
0012-821X