Mossbauer studies on tephra from post glacial eruption in
                southern iceland.

O. Helgason; S. Steinthorsson; K. Jonsson; N. Oskarsson; Jianzhong Jiang

Mossbauer studies on tephra from post glacial eruption in southern iceland.

O. Helgason, S. Steinthorsson, K. Jonsson, N. Oskarsson, Jianzhong Jiang

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Red oxidised scoria is formed through the influence of ground water in Strombolian type eruptions, and in craters formed by steam explosions where lavas cover wet grounds. The oxidation process takes the Fe+2/Fe(total) from about 0.8 to almost zero on the time scale of minutes. The oxidation of iron in the molten magma stabilises iron oxide minerals, raising their liquidus temperature (melting point) well about the temperature of the magma and causing massive instant crystallisation of maghemite or hematite. This process of oxidation was studied by Mossbauer spectroscopy by analysing samples of lava and scoria, representing different stages of oxidation.

Original language	English
Journal	Hyperfine Interactions (C)
Volume	3
Pages (from-to)	356
Publication status	Published - 1998

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title = "Mossbauer studies on tephra from post glacial eruption in southern iceland.",

abstract = "Red oxidised scoria is formed through the influence of ground water in Strombolian type eruptions, and in craters formed by steam explosions where lavas cover wet grounds. The oxidation process takes the Fe+2/Fe(total) from about 0.8 to almost zero on the time scale of minutes. The oxidation of iron in the molten magma stabilises iron oxide minerals, raising their liquidus temperature (melting point) well about the temperature of the magma and causing massive instant crystallisation of maghemite or hematite. This process of oxidation was studied by Mossbauer spectroscopy by analysing samples of lava and scoria, representing different stages of oxidation.",

author = "O. Helgason and S. Steinthorsson and K. Jonsson and N. Oskarsson and Jianzhong Jiang",

year = "1998",

language = "English",

volume = "3",

pages = "356",

journal = "Hyperfine Interactions (C)",

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TY - JOUR

T1 - Mossbauer studies on tephra from post glacial eruption in southern iceland.

AU - Helgason, O.

AU - Steinthorsson, S.

AU - Jonsson, K.

AU - Oskarsson, N.

AU - Jiang, Jianzhong

PY - 1998

Y1 - 1998

N2 - Red oxidised scoria is formed through the influence of ground water in Strombolian type eruptions, and in craters formed by steam explosions where lavas cover wet grounds. The oxidation process takes the Fe+2/Fe(total) from about 0.8 to almost zero on the time scale of minutes. The oxidation of iron in the molten magma stabilises iron oxide minerals, raising their liquidus temperature (melting point) well about the temperature of the magma and causing massive instant crystallisation of maghemite or hematite. This process of oxidation was studied by Mossbauer spectroscopy by analysing samples of lava and scoria, representing different stages of oxidation.

AB - Red oxidised scoria is formed through the influence of ground water in Strombolian type eruptions, and in craters formed by steam explosions where lavas cover wet grounds. The oxidation process takes the Fe+2/Fe(total) from about 0.8 to almost zero on the time scale of minutes. The oxidation of iron in the molten magma stabilises iron oxide minerals, raising their liquidus temperature (melting point) well about the temperature of the magma and causing massive instant crystallisation of maghemite or hematite. This process of oxidation was studied by Mossbauer spectroscopy by analysing samples of lava and scoria, representing different stages of oxidation.

M3 - Journal article

VL - 3

SP - 356

JO - Hyperfine Interactions (C)

JF - Hyperfine Interactions (C)

ER -