Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Petrological Characteristics and Provenance Interpretation of Daejiguksatapbi (State Preceptor Daeji's Memorial Stele) in Samcheonsaji Temple Site, Seoul

서울 삼천사지 대지국사탑비의 암석학적 특성과 산지해석

  • Kim, Jiyoung (Department of Cultural Heritage Conservation Sciences, Kongju National University) ;
  • Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Lee, Chan Hee (Department of Cultural Heritage Conservation Sciences, Kongju National University)
  • 김지영 (공주대학교 문화재보존과학과) ;
  • 이명성 (국립문화재연구소 보존과학연구실) ;
  • 이찬희 (공주대학교 문화재보존과학과)
  • Received : 2013.03.28
  • Accepted : 2013.04.20
  • Published : 2013.04.28
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Abstract

Daejiguksaptapbi (Tapbi) is a memorial stele which is inscribed with personal history of a state preceptor, Daejiguksa Beopkyeong. The Tapbi comprises tortoise-shaped pedestal, dragon top and body stone, and the body stone is remained in 255 pieces by excavation in Samcheonsaji temple site of Seoul. The Tapbi is composed of tuffaceous breccia for the body, coarse-grained pink feldspar granite for the pedestal and fine-grained granite for the top. As a result of geological survey to find a rock provenance of the Tapbi rock, the tuffaceous breccia is found in the banks of Gangwha straits, and the pink feldspar granite and fine-grained granite are found around the temple site in Mt. Bukhansan. Each rock shows similarities to the Tapbi in lithology and mineralogy. Also, geochemical data of major, some trace and rare earth elements verify their cognation in each rock type. It can be interpreted that the provenance of the body stone is distant as Gangwha area, and the provenance of the pedestal and top stones are near the temple site. The results can be utilized to restore the Tapbi by using the same rocks.

삼천사지 대지국사탑비는 고려시대 대지국사 법경의 행적을 기록한 석비이다. 이 탑비는 귀부, 비신 및 이수로 구성되어 있으며 비신은 발굴조사를 통해 약 255점의 파편으로 확인되었다. 탑비의 비신, 귀부 및 이수를 구성하는 암석은 각각 응회암질 각력암, 조립질 홍장석 화강암 및 세립질 화강암으로 동정되었다. 비의 구성암석과 동종의 암석 산출지를 탐색하기 위해 지표지질조사를 실시한 결과, 강화도 해협 양안에 점재하는 응회암질 각력암을 확인하였으며 조립질 홍장석 화강암과 세립질 화강암은 현재 삼천사지가 위치한 북한산에서 확인되었다. 비의 구성암석과 추정 산지 암석의 성인적 동질성을 규명하기 위해 암석학적 및 지구화학적 분석 결과, 추정 산지 암석의 광물조성, 조직, 암상적 특징과 지구화학적 거동특성이 탑비 구성암석과 매우 유사하였다. 따라서 비신은 강화도 해협 일대, 귀부와 이수는 삼천사지 주변이 석재 공급지였을 가능성이 아주 높은 것으로 해석된다. 이 결과는 현재 심하게 파손된 비신의 복원 시 신석재를 선택할 수 있는 근거자료로 활용될 수 있을 것이다.

Keywords

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