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Fe compounds in scoria as distributed in the south-western area of Jeju Island were investigated using X-ray fluorescence spectroscopy, X-ray diffractometry, and Fe Mossbauer spectroscopy. The samples were prepared from four parasite volcanoes. It was found that these samples are typical basalt comprised of SiO , Al O , Fe, and silicate minerals. The Mossbauer spectra showed doublets for olivine, pyroxene, and ilmenite as well as sextets for hematite and magnetite. The valence state of Fe is chiefly a 3+ charge state with a slight 2+ charge state. It is expected that these results will add to the body of information related to the formation mechanisms of Jeju Island.

Microscopic Study of Fe Compounds Containing Scoria in the South Western Area of Jeju