Paleoproterozoic magmatic and metamorphic events in the Hongcheon area, southern margin of the Northern Gyeonggi Massif in the Korean Peninsula, and their links to the Paleoproterozoic orogeny in the North China Craton

Lee, Byung Choon; Oh, Chang Whan; Yengkhom, Kesorjit S.; Yi, Keewook

doi:10.1016/j.precamres.2014.04.003

Cited by 58 publications

(28 citation statements)

References 94 publications

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“…Kim et al, 2008;K.H. Kim et al, 2008;Kee, 2011;Kim et al, 2006;Kim et al, 2009;Lee et al, 2014;Oh et al, 2006bOh et al, , 2015 S.W. Kim et al, 2008;Suzuki, 2009;Yengkhom et al, 2014;Yi and Cho, 2009).…”

Section: Regional Geologymentioning

confidence: 99%

“…Kim et al, 2008S.W. Kim et al, , 2011bCho et al, 2007Cho et al, , 2013aZhai et al, 2007;Kwon et al, 2009;Oh, 2012;Choi et al, 2012;Lee et al, 2014;Yengkhom et al, 2014;Kim et al, 2014a). Although most of the U-Th-Pb age data of polygenetic accessory minerals fall in the 235-231 Ma range, researchers found a number of older isotopic dates for such minerals between 245 and 260 Ma (errors: 3-16 Ma) in the Gyeonggi Massif Suzuki, 2009;Yengkhom et al, 2014) and the Imjingang Belt and correlatives (D.L.…”

Section: Regional Geologymentioning

confidence: 99%

“…1) is a poly-metamorphic terrane that mainly comprises middle Paleoproterozoic (ca. 1.93-1.83 Ga) highgrade gneiss (e.g., Kee, 2008;Lee and Cho, 2012;Lee et al, 2014;Oh et al, 2015) with minor Neoproterozoic (0.9-0.75 Ga) magmatic and sedimentary material along its western and northern margins J.M. Kim et al, 2008;Oh et al, 2009;Park et al, 2014b).…”

Section: Gyeonggi Massifmentioning

confidence: 99%

“…The Paleoproterozoic rocks experienced two superimposed tectono-metamorphic cycles: M1 under lower granulite-facies to upper amphibolite-facies conditions of middle Paleoproterozoic age and a second, weaker one (M2) that is characterized by decompression with or without reheating (e.g., Y. Cho et al, 1996;Oh et al, 2006aOh et al, , 2015Cho et al, 2013b;Lee et al, 2014;Yengkhom et al, 2014). Metamorphism during the M2 event (0.5-0.35 GPa, 650-750°C; Cho et al, 2013b;Lee et al, 2014;Oh et al, 2015) gave rise to moderate but widespread anatexis.…”

Section: Gyeonggi Massifmentioning

confidence: 99%

“…Cho et al, 1996;Oh et al, 2006aOh et al, , 2015Cho et al, 2013b;Lee et al, 2014;Yengkhom et al, 2014). Metamorphism during the M2 event (0.5-0.35 GPa, 650-750°C; Cho et al, 2013b;Lee et al, 2014;Oh et al, 2015) gave rise to moderate but widespread anatexis. Zircon from a cordieriterich migmatite near a Triassic intrusion yielded a ca.…”

Section: Gyeonggi Massifmentioning

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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Section: Regional Geologymentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Gyeonggi Massifmentioning

confidence: 99%

Section: Gyeonggi Massifmentioning

confidence: 99%

Section: Gyeonggi Massifmentioning

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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Petrogenesis of the Palaeoproterozoic (1.87 Ga) Damyang amphibolites in the north‐western margin of the Yeongnam Massif and tectonic implications of the Korean Peninsula

Wang

Lee

2023

Geological Journal

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The Yeongnam Massif is located in the southern part of the Korean Peninsula and holds key elements in understanding the Palaeoproterozoic tectonic evolution of north‐east Asia during the amalgamation of the Columbia supercontinent. In this study, we have conducted geochronological and geochemical studies on the mafic intrusive along the northern margin of the Yeongnam Massif. Sensitive high‐resolution ion microprobe (SHRIMP) U–Pb zircon dating on two amphibolite and one gabbro samples in the Damyang area show that the amphibolites crystallized at ~1.87 Ga and the gabbro crystallized at ~87.6 Ma. The 1.87 Ga Damyang amphibolites are simultaneous with the Muju and Okbang amphibolites along the northern margin of the Yeongnam Massif. They also show similar geochemical characteristics, including tholeiitic basalt composition, enriched Light Rare Earth Elements (LREE) and large ion lithosphile elements (LILEs), depleted high field strength elements (HFSEs), and slightly enriched but various Hf isotopes, indicating that they originated from an enriched but heterogeneous mantle source with fluid addition. Thus, the 1.87 Ga amphibolites along the northern margin of the Yeongnam Massif were probably emplaced in an arc‐related setting. Combined with the 2.02–1.96 Ga magmatism, it is proposed that the subduction might have lasted during the 2.02–1.85 Ga interval and mantle‐derived magma rose up due to the roll‐back process between 1.88–1.85 Ga.

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Tectonic evolution of Precambrian basement massifs and an adjoining fold-and-thrust belt (Gyeonggi Marginal Belt), Korea: An overview

et al. 2017

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Paleoproterozoic magmatic and metamorphic events in the Hongcheon area, southern margin of the Northern Gyeonggi Massif in the Korean Peninsula, and their links to the Paleoproterozoic orogeny in the North China Craton

Cited by 58 publications

References 94 publications

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

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

Petrogenesis of the Palaeoproterozoic (1.87 Ga) Damyang amphibolites in the north‐western margin of the Yeongnam Massif and tectonic implications of the Korean Peninsula

Tectonic evolution of Precambrian basement massifs and an adjoining fold-and-thrust belt (Gyeonggi Marginal Belt), Korea: An overview

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