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Characteristics of the Rock Cleavage in Jurassic Granite, Geochang
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 Title & Authors
Characteristics of the Rock Cleavage in Jurassic Granite, Geochang
Park, Deok-Won;
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 Abstract
Jurassic granite from Geochang was analysed with respect to the characteristics of the rock cleavage. we have mainly discussed the structual anisotropy formed by microcracks. The phases of distribution of microcracks were well evidenced from the enlarged photomicrographs() of the thin section. The planes of principal set of microcracks are parallel to the rift plane and those of secondary set are parallel to the grain plane. These rift and grain microcracks are mutually near-perpendicular on the hardway planes. From the directional angle() - total length(), number(N) and density() chart, the curve patterns of the above microcrack parameters reflect the phases of distribution of microcracks. Microcrack parameters such as number, length and density show an order of rift > grain > hardway. These results indicate a relative magnitude of the rock cleavage. Meanwhile, brazilian tensile strengths were measured with respect to the six directions. The results revealed a strong correlation between mechanical property with the above microcrack parameters. These general results correspond to those of the previous study for Jurassic granites from Pocheon and Hapcheon. Image processing technique for the enlarged photomicrograph of the thin section was carried out. The grain 1(G1) microcrack arrays developed in quartz and feldspar grains show excellent distribution on the photomicrograph. In particular, the directional angle of each microcrack set can be ascertained easily by brief image processing for the above photomicrograph.
 Keywords
Jurassic granite;rock cleavage;enlarged photomicrograph;microcrack parameters;image processing;
 Language
Korean
 Cited by
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"석재, 골재, 문화재 분야에서의 암석의 활용" 특별호를 발간하며,홍세선;

암석학회지, 2015. vol.24. 3, pp.149-151 crossref(new window)
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Evaluation for Rock Cleavage Using Distribution of Microcrack Spacings (III), The Journal of the Petrological Society of Korea, 2016, 25, 4, 311  crossref(new windwow)
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