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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.2
- 수록면
- 37 - 54 (18page)
- DOI
- 10.1007/s12303-021-0022-6
이용수
이 논문의 연구 히스토리 (6)
2022
Geochemistry and zircon U–Pb–Hf ages of Triassic plutons in the eastern Gyeonggi Massif, Korean Peninsula: imprecations for the positions of collision boundary and subduction zone
Kenta Kawaguchi
,
Chang Whan Oh
,
Ji Wan Jeong
대한지질학회 학술대회
2022.10
학술대회자료
Origin and tectonic relationship of metagabbro of the Sambagawa Belt, and associated Karasaki mylonites of western Shikoku, Southwest Japan
Kenta Kawaguchi
,
早坂康隆
,
Pham Minh
외 3명
Geosciences Journal
2022.02
학술저널
2021
Zircon U-Pb and Lu-Hf ages of the Jurassic granites, Southwest Japan: A key for the tectonic correlation between Korea and Japan
Kenta Kawaguchi
,
Chang Whan Oh
,
Masaya Fu
외 2명
대한지질학회 학술대회
2021.10
학술대회자료
Occurrence of large-scale strike-slip movement inferred from the detrital zircon U-Pb and Lu-Hf analysis of the Early Cretaceous sedimentary rocks, Southwest Japan
Kenta Kawaguchi
,
Chang Whan Oh
,
Kensuke Ku
외 1명
한국암석학회 학술발표회 논문집
2021.08
학술대회자료
2020
Zircon U-Pb ages and geochemical signatures of the Kurosegawa belt, Southwest Japan, as an Early Paleozoic continental fragment
Kenta Kawaguchi
대한지질학회 학술대회
2020.10
학술대회자료
Tectonic evolution of Southwest Japan at Late Cretaceous, inferred from the zircon U–Pb geochronology
Kenta Kawaguchi
한국암석학회 학술발표회 논문집
2020.08
학술대회자료
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초록· 키워드
오류제보하기
The Sambagawa Belt is a subduction-related high-pressure intermediate type metamorphic complex with its protoliths characterized by the ocean plate stratigraphy. The Iyo-nada Sea area of this belt at western Shikoku, Southwest Japan exposes lenticular bodies of metagabbro. Besides, low P/T type metamorphosed Karasaki mylonites occur in this area as an upper structural unit of the Sambagawa Belt. LA-ICP-MS zircon U-Pb dating of the metagabbros in the Sambagawa Belt revealed their crystallization ages of 139?135 Ma as a magmatic event. Trace element composition of zircon suggests that the metagabbros were formed under the arc tectonic setting. Metagabbros do not show any evidence of high P/T metamorphism, instead, they indicate low P/T metamorphism based on the chemical compositional analysis of the hornblende. From the present study, it is constrained that the 139?135 Ma metagabbros were possibly originated as the hanging-wall arc crust. Zircon U-Pb dating of the Karasaki mylonites revealed imprints of multiple tectono-thermal events of 114.3 ± 1.5 Ma (magmatic event), ~108?105 Ma (metamorphic with or without magmatic event), and 102.4 ± 0.9Ma (metamorphic event). The first two tectono-thermal events can be correlated with those of the Higo Belt, central Kyushu. However, the last metamorphic event is younger than the tectono-thermal events of the Higo Belt, instead, it coincides with the initial stage tectono-thermal events of Ryoke-San’yo igneous province. Detrital zircon age of the pelitic schist in Karasaki mylonites revealed their origin as Jurassic to earliest Cretaceous sedimentary rock and its age distribution pattern is likely comparable to the previously reported age spectra of Higo metasedimentary rocks and their equivalent rock units. The newly obtained dataset indicates that the Karasaki mylonites are the eastern extension of the late Early Cretaceous Higo Belt.
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