Journal of Conservation Science (보존과학회지)

The Korean Society Of Conservation Science For Cultural Heritage (한국문화재보존과학회)
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Study on the Material and Deterioration Characteristics of the Stone Seated Buddha Triad and Stone Standing Buddha in Bijung-ri, Cheongju, Korea

청주 비중리 석조여래삼존상 및 석조여래입상의 재질특성과 손상특성 연구

  • Yoo, Ji Hyun (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Choie, Myoungju (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Kim, Yuri (Conservation Science Division, National Research Institute of Cultural Heritage)
  • 유지현 (국립문화재연구소 보존과학연구실) ;
  • 최명주 (국립문화재연구소 보존과학연구실) ;
  • 이명성 (국립문화재연구소 보존과학연구실) ;
  • 김유리 (국립문화재연구소 보존과학연구실)
  • Received : 2021.11.04
  • Accepted : 2021.11.29
  • Published : 2021.12.20
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Abstract

The Stone Seated Buddha Triad and Stone Standing Buddha in Bijung-ri are state-designated heritage (treasure) statues having the Buddha style of the Goryeo dynasty from the 6th century. Conservation scientific investigations were conducted to understand the preservation status of these stone Buddha statues and to establish a conservation plan. The Stone Seated Buddha Triad and Stone Standing Buddha are composed of fine-medium grained biotite granite, which is considered to be of the same origin owing to their low magnetic susceptibility distribution of less than 0.2 (×10-3 SI unit) and similar mineral characteristics. The Stone Seated Buddha Triad has highly homogenous mineral composition and particle size, whole-rock magnetic susceptibility, and geochemical characteristics very similar to those of the nearby outcrop. It was confirmed that a combination of physical, chemical, and biological factors affects the Stone Buddha statues. In particular, both the Stone Seated Buddha Triad and Stone Standing Buddha tend to be chipped off from the front and cracked and scaled from the back. The Stone Standing Buddha located outdoors experiences granularity decomposition and black algae formation, which accelerate the weathering under unfavorable conservation environments. The result of non-destructive physical property diagnosis using ultrasonic velocity showed that both the Stone Seated Buddha Triad and Stone Standing Buddha have been completely weathered (CW), indicating very poor physical properties.

청주 비중리 석조여래삼존상 및 석조여래입상은 6세기 고구려 불상의 양식을 갖춘 중요한 국가지정문화재(보물)이다. 이들 석불상의 보존현황 파악 및 보존계획 수립을 위해 보존과학적 조사를 수행하였다. 석조여래삼존상 및 석조여래입상의 구성암석은 세립 내지 중립의 전형적인 흑운모화강암으로, 0.2(×10-3 SI unit) 미만의 낮은 대자율 분포, 구성광물에서 서로 유사한 특성을 보여 동일한 기원의 암석으로 판단된다. 석조여래삼존상은 인근 노두의 암석과 광물 조성 및 입도, 전암대자율, 지구화학적 특성이 매우 유사하였으므로 성인적 동질성이 높은 것으로 해석된다. 한편 비중리 석조불상에서는 물리적, 화학적, 생물학적 요인이 복합적으로 작용하고 있는 것으로 확인되었다. 특히 석조여래삼존상과 여래입상 모두 전면에서 탈락이, 후면에서 균열과 박리박락이 우세한 경향을 보였다. 야외에 위치한 석조여래입상에서는 입상분해와 흑색조류가 발달하여 열악한 보존환경과 함께 풍화를 가속화하고 있다. 초음파속도를 이용한 비파괴 물성진단 결과, 석조여래삼존상과 여래입상의 풍화등급은 완전 풍화된 상태(CW)로 나타나 매우 낮은 물성을 지시하였다.

Keywords

References

  1. Cheong, W.S., Kim, Y.S. and Na, K.C., 2011, SHRIMP zircon U-Pb geochronology, geochemistry and Sr-Nd isotopic study of the Cheongju granitoid rocks. The Journal of the Petrological Society of Korea, 20, 191-206. (in Korean and English abstract) https://doi.org/10.7854/JPSK.2011.20.4.191
  2. Cho, J.H., Lee, C.H., Kim, J., Morii, M., Lee, M.S. and Kim, S.D., 2012, Deterioration evaluation and material characteristics of the Usuki Stone Buddha statues in Oita, Japan. Journal of Conservation Science, 28, 39-52. (in Korean and English abstract) https://doi.org/10.12654/JCS.2012.28.1.039
  3. Chun, Y.G., Lee, C.H., Jo, S.N., Jo, Y.H., Park, G.J. and Yang, P.S., 2008, Measurement of Crack Depth and Weathering Degree Using Ultrasonic Velocity and Deterioration Evaluation of the Unhyungung Stone Water Container. Journal of Conservation Science, 24, 1-11. (in Korean and English abstract)
  4. Iliev, I.G., 1966, An attempt to estimate the degree of weathering of intrusive rocks from their physicomechnical properties. the First Congress of the International Societ of Rock Mechanics, Lisbon, September 25-October 1, 109-114.
  5. Jin, H.J., Kim, R.H., Yoon, J.H. and Lee, C.H., 2014, Investigation of provenance and characteristics for rock properties to the South Gate Wall of Myeoncheoneupseong Town Wall in Dangjin, Korea. Joumal of Conservation Science, 30, 189-203. (in Korean and English abstract) https://doi.org/10.12654/JCS.2014.30.2.08
  6. Kim, C., 2016, A study on the Stone Buddha Statues from Bijung-ri temple site, Cheongju: Focusing on country of origin. Art History Association Of Korea. 290-291, 5-42. (in Korean and English abstract)
  7. Kim, J., Jo, Y.H. and Lee, C.H., 2013, Material and deterioration characteristic analysis for stone sculptures in Gyeongbokgung royal palace, Seoul. Journal of Conservation Science, 29, 407-420. (in Korean and English abstract) https://doi.org/10.12654/JCS.2013.29.4.11
  8. KNUE Educational Museum, 1991, Archaeological field survey and brief report of excavation on the Stone Buddha in Cheongwon-gun Bugil-myeon Bijoong-ri. Cheongwon-gun, 1-13. (in Korean)
  9. Lee, C.H. and Kim, J.H., 1971, Geologic map of Jeungpyeong Sheet (1:50,000). Geological Survey of Korea, 1-16. (in Korean and English abstract)
  10. Lee, C.H., Jo, Y.H. and Chun, Y.G., 2009, Establishment of ultrasonic measurement and correlations of direct-indirect method for weathering evaluation of stone cultural heritage. Journal of Conservation Science, 25, 233-244. (in Korean and English abstract)
  11. Lee, C.H., Shin, H.C. and Han, D.R., 2017, Ultrasonic properties on building stones, characteristics of structural deformation and conservation states of the sanctuary in Wat Phou Temple of Champasak, Lao PDR. Journal of Conservation Science, 33, 399-416. (in Korean and English abstract) https://doi.org/10.12654/JCS.2017.33.6.01
  12. Middlemost, E.A., 1994, Naming materials in the magma/igneous rock system. Earth-science reviews, 37, 215-224. https://doi.org/10.1016/0012-8252(94)90029-9
  13. Moon, M., 1982, On the Three-kingdom Period stone buddha image unearthed at Chungwon Bijoong-ri. Bulgyohakbo, 19, 257-274. (in Korean)
  14. National Research Institute of Cultural Heritage, 2012, Nondestructive evaluation of weathering degree for stone cultural heritage using ultrasonic test. National Research Institute of Cultural Heritage, 1-19. (in Korean)
  15. Nockolds, S.R., 1954, Average chemical compositions of some igneous rocks. Geological Society of American Bulletin, 65, 1007-1032. https://doi.org/10.1130/0016-7606(1954)65[1007:ACCOSI]2.0.CO;2
  16. Park, J.H., Lee, C.H. and Choi, G.E., 2017, Characteristics of surface deterioration and materials for stone guardian and stone memorial tablets from Muryeong Royal Tomb of Baekje Kingdom in ancient Korea. Journal of Conservation Science, 33, 241-254. (in Korean and English abstract) https://doi.org/10.12654/JCS.2017.33.4.02
  17. Pearce, J.A., 1983, Role of sub-continental lithosphere in magma genesis at active continental margines. In Hawkesworth, C.J. and Norry, M.J. (eds.), Continental Basalts and Mantle Xenolith, Shiva, 230-249.
  18. Taylor, S.R. and Mclennan, S.M., 1985, The continental crust: Its composition and evolution. Blackwell, Oxford, 312.
  19. Yi, J.E., Lee, C.H. and Lee, M.S., 2006, Deterioration assessment and conservational scientific diagnosis of the Stone Pagoda in the Bunhwangsa temple, Gyeongju, Korea. Journal of Conservation Science, 18, 19-32. (in Korean and English abstract)