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http://dx.doi.org/10.4283/JKMS.2010.20.3.114

A Study on Iron Compounds of Volcanic Rock in the Seaside Area of Ulleung Island  

Yoon, In-Seop (Department of Broadcasting Visual Technology, Kangwon University)
Kim, Sun-Bae (Department of Physics, Dongguk University)
Kim, Hyung-Sang (Department of Physics, Dongguk University)
Abstract
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 M$\ddot{o}$ssbauer spectroscopy. We found that samples were typical basic rock which had the total amount of iron compounds including hematite ($\alpha-Fe_2O_3$) varies from 10.6 w% to 14.5 w% depending on the different regions by XRF. The M$\ddot{o}$ssbauer spectra of the samples were consisted of one sextet due to hemitite and doublets due to $Fe^{3+}$ in various clay mineral and $Fe^{2+}$ in pyroxene $(Ca,Fe,Mg)_2(SiO_4)_2$, ilmenite ($FeTiO_3$) and olivine $(Mg,Fe)_2SiO_4$. The balance state of Fe ions of all samples was chiefly $Fe^{3+}$, so we could find that the volcanic rocks distributed in the seaside area of Ulleung island were made in inland.
Keywords
volcanic rocks; XRD; XRF; M$\ddot{o}$ssbauer spectrum; iron compound;
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