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Geochemical Study of Fumarolic Condensates from Kilauea Volcano, Hawaii

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Title:Geochemical Study of Fumarolic Condensates from Kilauea Volcano, Hawaii
Authors:Barnard, Walther M.
Halbig, Joseph B.
Fountain, John C.
Date Issued:Jul 1990
Publisher:University of Hawaii Press
Citation:Barnard WM, Halbig JB, Fountain JC. 1990. Geochemical study of fumarolic condensates from Kilauea Volcano, Hawaii. Pac Sci 44(3): 197-206.
Abstract:Results of a geochemical study based on 20 samples of condensates
obtained between late December 1987 and early January 1989 at five
fumarole sites on or near the summit of Kilauea Volcano, island of Hawaii, are
presented. Fumarole chemistry may be explicable in terms of the currently
accepted model of Kilauea and its mechanisms of magma replenishment and
storage, degassing, and eruptive activity; it may have potential for forecasting
eruptions. Fumaroles emit magmatic and recycled gases and aerosols that enter
into Earth's exchangeable reservoirs and which have a potentially harmful
impact on health and the environment through release of toxic materials and
creation of precipitation and vog of acidic character. Condensates from
fumaroles were analyzed by neutron activation/gamma-ray spectroscopy. Concentrations
of 28 elements are tabulated and statistically analyzed. Seven
elements (As, Ba, K, Sc, Se, V, and W) were in concentrations less than their
detection limits; 10 elements (Br, Cr, Cu, Eu, Fe, Hf, Mg, Sb, Sr, and Ti) were
below their detection limits in 75% or more of the samples; and II elements (AI,
Ca, Cl, Co, I, La, Mn, Na, S, V, and Zn) exhibited significant variation.
Individual fumaroles with distinctive ratios of elements and a high degree of
correlation between element pairs are identified.
Appears in Collections: Pacific Science Volume 44, Number 3, 1990

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