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윤인섭(In Seop Yoon),김선배(Sun Bae Kim),김형상(Hyungsang Kim) 한국자기학회 2010 韓國磁氣學會誌 Vol.20 No.3
Fe compounds of volcanic rock samples distributed in the seaside area of Ulleung island were investigated by means of X-ray diffractometry (XRD), X-ray fluorescence spectroscopy (XRF) and Mossbauer spectroscopy. We found that samples were typical basic rock which had the total amount of iron compounds including hematite (α-Fe₂O₃) varies from 10.6 w% to 14.5 w% depending on the different regions by XRF. The Mossbauer spectra of the samples were consisted of one sextet due to hemitite and doublets due to Fe<SUP>3+</SUP> in various clay mineral and Fe<SUP>2+</SUP> in pyroxene (Ca,Fe,Mg)₂(SiO₄)₂, ilmenite (FeTiO₃) and olivine (Mg,Fe)₂SiO₄. The balance state of Fe ions of all samples was chiefly Fe<SUP>3+</SUP>, so we could find that the volcanic rocks distributed in the seaside area of Ulleung island were made in inland.