Petrology, geochemistry, and geochronology of the post-collisional Triassic mangerite and syenite in the Gwangcheon area, Hongseong Belt, South Korea

Seo, Jung-Kil; Choi, Seon Gyu; Oh, Chang Whan

doi:10.1016/j.gr.2009.12.009

Cited by 83 publications

(43 citation statements)

References 74 publications

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“…1a). Recent studies have focused on the magmatic, metamorphic, and tectonic history of these various units with several new proposals on the plate tectonic architecture of the region (Oh, 2006;Metcalfe, 2006;Williams et al, 2009;Oh et al, 2009;Sajeev et al, 2010;Seo et al, 2010;Kim et al, 2011a,b,c,d;Lee et al, 2011). The Gyeonggi massif consists mainly of Precambrian metamorphic rocks and Mesozoic granitoids.…”

Section: Geological Settingmentioning

confidence: 99%

Late Cretaceous volcanic rocks and associated granites in Gyeongsang Basin, SE Korea: Their chronological ages and tectonic implications for cratonic destruction of the North China Craton

Zhang

Zhai

Hou

et al. 2012

Journal of Asian Earth Sciences

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Section: Geological Settingmentioning

confidence: 99%

Late Cretaceous volcanic rocks and associated granites in Gyeongsang Basin, SE Korea: Their chronological ages and tectonic implications for cratonic destruction of the North China Craton

Zhang

Zhai

Hou

et al. 2012

Journal of Asian Earth Sciences

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“…7). Late Triassic postcollisional magmatic activity is manifest by Haemi pluton (230-234 Ma; Choi et al, 2009;Seo et al, 2010;Cheong et al, 2014) in the Hongseong area (Fig. 4), and the Mongsanpo intrusion (229.6 ± 3.5 Ma; Han, 2014) on Anmyeon Island (Fig.…”

Section: Western Margin Gyeonggi Massif -Hongseong Area and Anmyeon Imentioning

confidence: 99%

“…Kim et al, 2011;Jeong et al, 2008;Kee, 2011;Oh et al, 2006b;Peng et al, 2008;S.W. Kim et al, 2011a;Seo et al, 2010;Williams et al, 2009;Wu et al, 2007). 237-228 Ma mineral ages in (migmatitic) gneisses in large parts of central Korea imply a coeval regional metamorphic event.…”

Section: Introductionmentioning

confidence: 99%

“…The Carnian to early Norian magmatic suite is usually interpreted as due to a change of tectonic regime subsequent to plate collision from compressional to tensional (S.W. Kim et al, 2011a;Williams et al, 2009), often linked to asthenospheric upwelling induced by lithospheric delamination , or oceanic slab break-off (Oh, 2012;Seo et al, 2010). Two alkali granites with A-type geochemistry yielded identical 219.3 ± 3.3 Ma and 219.6 ± 1.9 Ma U-Pb Sensitive High-Resolution Ion Micro-Probe (SHRIMP) ages on zircon (Cho et al, 2008), which the authors interpreted as dating the extensional tectonism subsequent to major collision.…”

Section: Introductionmentioning

confidence: 99%

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Fast cooling following a Late Triassic metamorphic and magmatic pulse: implications for the tectonic evolution of the Korean collision belt

2015

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International audienceWe discuss the evolution of Korea in the context of a relatively short-lived, tectonically induced, magmatic and metamorphic pulse that affected large portions of the crust of the peninsula's southern part during the Late Triassic. Recent 40Ar/39Ar single grain laser step-heating dates imply a prolonged metamorphic recrystallization between 243 and 220 Ma, which occurred in distinct phases that were not coeval throughout the peninsula. We obtained identical plateau ages between 231.4 ± 0.8 and 228.9 ± 0.8 Ma (1σ; 85–95% 39Ar release) on single grains of detrital muscovite from Jurassic sandstones (Gimpo Group). A literature review shows that the ages of detrital muscovites are identical to: (1) concordant 40Ar/39Ar ages of biotite (228 Ma) and amphibole (230 Ma) in amphibolites of the Deokjeongri Gneiss Formation and the Weolhyeonri Complex, pointing to very rapid cooling of 100–150 °C/Ma, and (2) 231–229 Ma muscovite from the low-grade metamorphic mid-Paleozoic turbidites of the Taean Formation. The efficiency of cooling is further underlined by the near-coincidence of these 40Ar/39Ar ages with 243–229 Ma (average: 234.6 Ma) zircon U–Pb ages in the Gyeonggi Massif and the Hongseong belt, in the literature. It is argued that the Late Triassic magmatic and metamorphic pulse is superimposed on an earlier tectono-metamorphic event, possibly related to collision, indicated by: (1) ~ 243–237 Ma muscovite ages, or age components in age spectra, and (2) two generations of folds and associated tectonic foliations truncated by ~ 229.5-Ma-old syenites and earlier mafic dykes. The Late Triassic thermal pulse could have been the result of post-collisional delamination of the lower crust and uppermost mantle, and/or oceanic slab break-off, which is also suggested by almost coeval, widespread mantle-sourced Mg-rich potassic magmatism. Continuing ductile deformation is shown by mylonitization of Late Triassic magmatic rocks; an ~ 220 Ma muscovite age may be related to this

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“…또한 화성활동이 일어난 지구조환경 역시 태평양 쪽으로부터의 섭입작용의 직접적인 영향으로 만들어진 것뿐만 아니라 고생대말-중생대초에 있었던 것으로 추정되는 대륙충돌사건 이후의 후충돌 환경에 서 만들어진 것으로 주장되는 암체들도 있다(예, Cho et al, 2008;Peng et al, 2008;Seo et al, 2010). 이와 더불어 한반도에 인접한 북중국지괴의 경우에는 중생대의 화성활동 일부와 한반도의 쥬라기 화성활동 이 불안정한 암권맨틀이 떨어져나감(detachment 또는 delamination)의 영향으로 만들어진 것이라는 주장이 나오고 있다(예, Yang and Li, 2008;Kee et al, 2010 (Park et al, 2009).…”

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Cyclic Igneous Activities During the Late Paleozoic to Early Cenozoic Period Over the Korean Peninsula

Park¹

2012

The Journal of the Petrological Society of Korea

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There were three cycles of igneous activities from the late Paleozoic to early Cenozoic; Permian to Triassic, Jurassic, and Cretaceous to Paleogene. After the beginning of each igneous activity cycle, igneous activity became more frequent until its climax. It is noteworthy that A-type magmatisms are reported from near the ends of the all three igneous activity cycles. In addition, adakitic magmatisms occurred at the beginning of both the Permian-Triassic and the Cretaceous-Paleogene cycles. Most of the igneous activities during the late Paleozoic to early Cenozoic period were subduction-related. Therefore, transitions among beginning, proceeding, and closing of the igneous activity cycles would be intimately related with changes in directions of plate movements. In this context, I suggest following hypotheses. The closing of the Permian-Triassic igneous cycle was possibly a consequence of radical adjustment of plate motion occurred due to continental collision between north and south China blocks. Considering that no appreciable tectonic activities were recognized from the east Asian continent at the closing of the Jurassic igneous cycle, it seems that one of the strong events related with Gondwanaland-breakup and subsequent birth of the new oceans, which might cause sudden adjustments of plate motions. The closing of the Cretaceous-Paleogene igneous cycle seems to be caused as a consequence of the collision between India and Asia continents. Meanwhile, adakitic igneous bodies emplaced at the beginnings of the Permian-*Corresponding author

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Petrology, geochemistry, and geochronology of the post-collisional Triassic mangerite and syenite in the Gwangcheon area, Hongseong Belt, South Korea

Cited by 83 publications

References 74 publications

Late Cretaceous volcanic rocks and associated granites in Gyeongsang Basin, SE Korea: Their chronological ages and tectonic implications for cratonic destruction of the North China Craton

Late Cretaceous volcanic rocks and associated granites in Gyeongsang Basin, SE Korea: Their chronological ages and tectonic implications for cratonic destruction of the North China Craton

Fast cooling following a Late Triassic metamorphic and magmatic pulse: implications for the tectonic evolution of the Korean collision belt

Cyclic Igneous Activities During the Late Paleozoic to Early Cenozoic Period Over the Korean Peninsula

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