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Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea
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 Title & Authors
Determination of Rock Cleavages Using AMS (Anisotropy of Magnetic Susceptibility): a Case Study on the Geochang Granite Stone, Korea
Cho, Hyeongseong; Kim, Jong-Sun; Kim, Kun-Ki; Kang, Moo-Hwan; Sohn, Young Kwan; Lee, Youn Soo; Jwa, Yong-Joo; Son, Moon;
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In granite quarry, stones are generally quarried along easily separating planes called as `rock cleavage`. Because orientation and characteristics of the rock cleavage are directly involved with easy quarrying, it is the most important factor on selecting a direction of digging. Using AMS (anisotropy of magnetic susceptibility), we attempt to interpret rock fabrics in Geochang Granite Stone (JS, SD, AR, GD, BW, MD quarry) and discuss about determination of rock cleavages and correlation between the rock fabrics and cleavages. Based on mean susceptibility, thermo-susceptibility curves, and hysteresis parameters, Ti-poor MD and/or PSD magnetites are the main contributor to AMS of the granite stones. The systematic magnetic foliations with sub-vertical dip angle are developed in the whole granite quarries. In most of the granite quarries, the magnetic foliations are significantly consistent with grain plane. In the BW quarry, which has higher values than the others, the magnetic foliations coincide exceptionally with rift plane. These results suggest that rock cleavages in granite stone are related to rock fabrics meaning shape and spatial arrangement of crystals. Magnetic fabrics analysis using AMS method, therefore, can be a quantitative and effective tool for determination of rock cleavages in granite quarry.
Rock cleavage;Magnetics fabric;Anisotropy of magnetic susceptibility (AMS);Geochang;Granite stone;
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Editorial : 2015, Applied petrology: Dimension stone, Aggregate, Stone cultural heritage, The Journal of the Petrological Society of Korea, 2015, 24, 3, 149  crossref(new windwow)
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