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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 585 - 596 (12page)
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In situ zircon Hf isotopic analysis was conducted to investigate the characteristics of source materials responsible for generations of the Phanerozoic granitoids in South Korea. The Hf isotopic data compiled from the literature together with this study revealed two principal types of source materials governing the generation of the Permo-Triassic granitoids. One type corresponds to long-lasting, ancient lithospheric materials having highly negative εHf(t) values of –24.3 to –18.6 and is temporally equivalent to the Paleoproterozoic to Neoarchean basement rocks prevalent in South Korea. This type is a primary source material for the Triassic postorogenic granitoids in the Gyeonggi massif. The other type corresponds to juvenile materials accreted by Late Paleozoic continental arc magmatism. This relatively young crust occurs largely in and around the Gyeongsang basin. Systematic southeastward increase in εHf(t) values of both Permo-Triassic and Jurassic granitoids indicates enhanced contributions of juvenile materials toward the paleo-trench. Such a trend is best explained by the chemical mixing of two principal types of source. Northern limit of chemical interactions between ancient and juvenile components is inferred to lie along the central Okcheon belt during the Permo-Triassic. However, this boundary has shifted southeastward in Jurassic to be defined by the Sunchang– Yecheon shear zone, a part of the Honam Shear Zone. The arc-related juvenile crust was also a principal source for the Cretaceous-Paleogene granitoids in the Gyeongsang basin.
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참고문헌 (67)
참고문헌 신청
Bouvier, A. / 2008 / The Lu-Hf and Sm-Nd isotopic composition of CHUR : Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets / Earth and Planetary Science Letters 273:48~57
Chauvel, C. / 2008 / Role of recycled oceanic basalt and sediment in generating the Hf-Nd mantle array / Nature Geosciences 1:64~67
정창식 / 2012 / 남한 지역 현생 화강암류의 연대측정 결과 정리 / 암석학회지 21(2):173~192
Cheong, C. -S. / 2015 / Lithospheric mantle signatures as revealed by zircon Hf isotopes of Late Triassic post-collisional plutons from the central Korean peninsula, and their tectonic implications / Terra Nova 27:97~105
Cheong, C. -S. / 2014 / Petrogenesis of Late Permian sodic metagranitoids in southeastern Korea : SHRIMP zircon geochronology and elemental and Nd-Hf isotope geochemistry / Journal of Asian Earth Sciences 95:228~242
Chauvel, C. / 2008 / Role of recycled oceanic basalt and sediment in generating the Hf-Nd mantle array / Nature Geosciences 1:64~67
정창식 / 2012 / 남한 지역 현생 화강암류의 연대측정 결과 정리 / 암석학회지 21(2):173~192
Cheong, C. -S. / 2015 / Lithospheric mantle signatures as revealed by zircon Hf isotopes of Late Triassic post-collisional plutons from the central Korean peninsula, and their tectonic implications / Terra Nova 27:97~105
Cheong, C. -S. / 2014 / Petrogenesis of Late Permian sodic metagranitoids in southeastern Korea : SHRIMP zircon geochronology and elemental and Nd-Hf isotope geochemistry / Journal of Asian Earth Sciences 95:228~242
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