서울 북부 대보화강암 산지 암석의 풍화특성
Rock Weathering Characteristics of Daebo granite at Mt. Dobong, Mt. Bukhan, Mt. Surak and Mt. Bulam in Northern Seoul
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초록
Determination of degree of chemical weathering in stone cultural heritage is very hard, because of the difficulties to collect the samples from the protected site. Samples, biotite granite, collected from the mountains of northern Seoul to find the chemical properties and moisture contents. The results are used to examine the relationship between the physical properties of water and condition of the rock chemical weathering index(CIA, WPI). The WAR values of rocks used in the study are 1.53~3.28% of Mt. Dobong, 1.21~3.77% in Mt. Bukhan, 0.96~2.94% at Mt. Surack, and 1.87~3.03% of Mt. Bulam, respectively. The CIA values of this study are found as 49.71~57.63 for Mt. Dobong samples, 50.54~54.30 for Mt. Bukhan samples, 48.97~55.42 for Mt. Surack samples, and 50.08~55.07 for Mt. Bulam samples. In the case of WPI, it is found as 6.53~9.7 for Mt. Dobong, 7.29~8.81 for Mt. Bukhan, 7.62~10.45 for Mt. Surack, and 7.95~9.17 for Mt. Bulam. While the WAR values are increased, CIA values are increased within the range of 45~55 and WPI values are decreased. There is no clear relationship between the WAR and weathering index, so there is strong needs for further studies to find the relationship between WAR and weathering index.
Abstract
Determination of degree of chemical weathering in stone cultural heritage is very hard, because of the difficulties to collect the samples from the protected site. Samples, biotite granite, collected from the mountains of northern Seoul to find the chemical properties and moisture contents. The results are used to examine the relationship between the physical properties of water and condition of the rock chemical weathering index(CIA, WPI). The WAR values of rocks used in the study are 1.53~3.28% of Mt. Dobong, 1.21~3.77% in Mt. Bukhan, 0.96~2.94% at Mt. Surack, and 1.87~3.03% of Mt. Bulam, respectively. The CIA values of this study are found as 49.71~57.63 for Mt. Dobong samples, 50.54~54.30 for Mt. Bukhan samples, 48.97~55.42 for Mt. Surack samples, and 50.08~55.07 for Mt. Bulam samples. In the case of WPI, it is found as 6.53~9.7 for Mt. Dobong, 7.29~8.81 for Mt. Bukhan, 7.62~10.45 for Mt. Surack, and 7.95~9.17 for Mt. Bulam. While the WAR values are increased, CIA values are increased within the range of 45~55 and WPI values are decreased. There is no clear relationship between the WAR and weathering index, so there is strong needs for further studies to find the relationship between WAR and weathering index.
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