남원화강암과 순창화강암의 SHRIMP U-Pb 연령

국문 초록 (Abstract)

남원화강암과 순창화강암은 한반도의 남서부에서 각각 영남육괴와 옥천변성대를 관입하고 있는 인접암체이다. 이 연구에서는 가장 신뢰도가 높은 연령 분석방법으로 평가되는 SHRIMP를 이용하여 남원화강암과 순창화강암체의 저어콘 U-Pb 연대측정을 실시하였다. 그 결과 남원화강암체로부터 185.8±0.9(2σ) Ma의 정치연령을 구하였다. 한편 순창화강암체의 북부지역으로부터는 175.0±2.0(2σ) Ma, 그리고 중부지역으로부터는 179.8±0.9(2σ) Ma의 연령을 구하였으며, 순창화강암체의 분석자료 전체로부터는 177.4±1.3(2σ) Ma의 평균연령이 계산되었다. 이러한 결과는 순창화강암에 현저한 변형을 초래한 호남전단대의 활동이 약 175Ma 이후에도 일어났음을 확인해준다.

다국어 초록 (Multilingual Abstract)

The Namwon and Sunchang granites are neighbouring plutons intruding the Yeongnam massif and the Okcheon metamorphic belt, respectively in the southwestern part of the Korean peninsula. In this study, SHRIMP zircon U-Pb ages are determined from these plutons. The results show that the emplacement age of the Namwon granite is 185.8±0.9(2σ) Ma. We obtained 175.0±2.0(2σ) Ma from the northern part and 179.8±0.9(2σ) Ma from the central part of the Sunchang granite, yielding 177.4±1.3(2σ) Ma as the average age of the pluton. Such age results confirm that the Honam shear zone, which cause marked deformation of the Sunchang granite, was active after ca. 175 Ma.

목차 (Table of Contents)

• 요약
• Abstract
• 서론
• 기존 연대측정 결과 검토
• SHRIMP 연대측정 및 결과 그리고 토의
• 연대측정 결과 및 의미
• References

참고문헌 (Reference)

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