Jurassic granite from Geochang was analysed with respect to the characteristics of the rock cleavage. The comprehensive evaluation for rock cleavages was performed through the combination of the 16 parameters derived from the enlarged photomicrographs...
Jurassic granite from Geochang was analysed with respect to the characteristics of the rock cleavage. The comprehensive evaluation for rock cleavages was performed through the combination of the 16 parameters derived from the enlarged photomicrographs of the thin section and the spacing-cumulative frequency diagrams. The results of analysis for the representative values of these spacing parameters with respect to the rock cleavage are summarized as follows. First, the above parameters can be classified into group I (spacing frequency (N), total spacing (1 m ≥), constant (a), exponent (λ), slope of exponential straight line (θ), length of line (oa') and trigonometric ratios (sinθ, tanθ) and group II (mean spacing (Sm), difference value between mean spacing and median spacing (Sm-Sme), density (ρ), lengths of lines (oa and aa'), area of a right-angled triangle (Δoaa') and trigonometric ratio(cosθ). The values of the 8 parameters belonging to group I show an order of H(hardway, H1+H2)<G (grain, G1+G2)<R (rift, R1+R2). On the contrary, the values of the 7 parameters belonging to group II show an order of R<G<H. The correlation of the mutually reverse order between the two groups can be drawn. Second, the distribution chart showing strong correlation among the 16 parameters were made in connection with the above correlation analysis. From the related chart, the graphs of the above parameters can be divided into two groups showing mutually symmetrical shape about the horizontal line of Y=1. The mean slope for line graphs belonging to group I and group II increase in the upper and lower domain from the related chart. This increasing phenomenon on the slope are more clear in the distribution chart with respect to three rock cleavages. Finally, this type of correlation analysis is useful for discriminating three quarrying planes.