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Article
Original mineralogy of ordovician stromatoporoids
Stromatoporoids in the Middle Ordovician Yeongheung Formation show delicate reticulate structures of persistent laminae and discontinuous pillars. Abundant microdolomite inclusions are found in the stromatopor...
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Article
Illite Crystallinity and Fluid Inclusion Analysis Across a Paleozoic Disconformity in Central Korea
Illite crystallinity and fluid inclusion techniques are used to understand the thermal histories of rocks on either side of the disconformity between the Lower and Upper Paleozoic strata in South Korea. Illite...
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Article
High alumina glaucony from the Early Ordovician Mungok Formation, Korea
The Lower Ordovician Mungok Formation in Yeongweol area contains several thin glaucony-bearing horizons. These horizons are located in the peloidal grainstone interval, about 5–10 m above the base of the Mungo...
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Article
Depositional cyclicity of the Middle Ordovician Yeongheung Formation, Korea
The Middle Ordovician Yeongheung Formation consists of numerous meter-scale, shallowing-upward cycles, which were deposited on a shallow-marine carbonate platform. Two types of shallowing-upward cycles, periti...
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Article
Provenance of Pyeongan Supergroup (late Paleozoic) sandstones in Yeongweol coalfield, Korea
Medium- to coarse-grained sandstones of the Pyeongan Supergroup (Carboniferous to Early Permian) in Yeongweol coalfield, Korea are studied to infer provenance and tectonic settings. Detrital modes of the sands...
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Article
Cyclostratigraphy of the Lower Ordovician Dumugol Formation, Korea: meter-scale cyclicity and sequence-stratigraphic interpretation
The Lower Ordovician Dumugol Formation in the southern part of the Baegunsan Syncline, Korea, comprises a succession of mixed siliciclastic and carbonate sediments. The depositional system of the Dumugol Forma...
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Article
Geotectonic significance of detrital chromian spinel: a review
Detrital chromian spinel is one of important minerals in paleogeographic reconstructions. Its host rocks, such as mafic to ultramafic rocks, occur in several types of tectonic settings. The chemical compositio...
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Article
Geochemical characteristics of the Manhang Formation (Late Carboniferous) sandstones, Korea: implication for provenance
The Late Carboniferous Manhang Formation is distributed in Samchok (Samcheog), Tanyang (Danyang), Chongson (Jeongseon), Kangnung (Gangreung), and Munkyong (Mungyeong) coalfields. The chemical compositions of t...
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Article
Late Jurassic radiolarians from pebbles of Lower Cretaceous conglomerates of the Hayang Group, southeastern Korea
Permian to Late Jurassic radiolarians were obtained from granules and pebbles in conglomerates of the Donghwachi and Gisadong formations of the Lower Cretaceous Hayang Group, southeastern Korea. Radiolarian fa...
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Article
Cyclic sedimentation across a Middle Ordovician carbonate ramp (Duwibong Formation), Korea
The Middle Ordovician Duwibong Formation (about 100 m thick), Korea, comprises various lithotypes deposited across a carbonate ramp. Their stacking patterns constitute several kinds of meter-scale, shallowing-...
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Article
Kübler Illite “Crystallinity” Index of the Cretaceous Gyeongsang Basin, Korea: Implications for Basin Evolution
Thermal maturity of the Lower Cretaceous Sindong and Hayang groups in the Gyeongsang Basin, Korea, was investigated using the Kübler illite “crystallinity” index (KI) which is based on the numerical expression...
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Article
Effect of Excimer Laser Annealing on Optical Properties of GaN Films Deposited by R.F. Magnetron Sputtering
GaN thin films on sapphire were grown by RF magnetron sputtering with ZnO buffer layer. The tremendous mismatch between the lattices of GaN and sapphire can be partly overcome by the use of thin buffer layer o...
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Article
A new Late Proterozoic stratum in South Korea
The Myeonsan Formation, the lowermost strata of the lower Paleozoic sequence, has basal conglomerate, which consists mostly of orthoquartzite and granitic gneiss clasts. The latter was derived from the basemen...
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Article
Geochemistry and provenance of Lower Cretaceous Sindong and Hayang mudrocks, Gyeongsang Basin, Southeastern Korea
Lower Cretaceous Sindong and Hayang mudrocks in the Gyeongsang Basin, Korea, have been analyzed for major and trace elements, including the rare earth elements (REEs). The Sindong mudrocks are relatively enric...
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Chapter and Conference Paper
Mixed Usage of Wi-Fi and Bluetooth for Formulating an Efficient Mobile Conferencing Application
This paper proposes a mobile conferencing system which allows the mixed usage of Wi-Fi and Bluetooth and the performance analysis of it. The performance analysis includes the analysis of interference due to th...
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Article
Detrital modes of the East Gobi Basin (Ondor-Bogd area) sandstones (Late Jurassic-Early Cretaceous) in southeastern Mongolia and their geological implications
Sandstones of the Late Jurassic and Early Cretaceous of the East Gobi Basin, Ondor-Bogd area, South Mongolia are studied for the first time to infer the provenance and tectonic settings of the source areas. Th...
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Article
Thermal histories of the Cretaceous Pungam and Yeongdong basins, Korea based on apatite and zircon fission track analysis
Apatite and zircon fission track (FT) analyses were carried out to reconstruct the thermal histories of the Cretaceous Pungam and Yeongdong basins, Korea. These basins were formed along the sinistral strike-sl...
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Article
Early evolution of the Duwibong Unit of the lower Paleozoic Joseon Supergroup, Korea: A new view
This study proposes the revised stratigraphy of the lower part of the Duwibong Unit of the lower Paleozoic Joseon Supergroup that the Myobong Formation is the lowermost stratum. The Jangsan Formation, which ha...
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Article
Geological age of the Jeongseon Formation, Joseon Supergroup (lower Paleozoic): a perspective from carbon isotope stratigraphy
Due to the lack of index fossils and extensive alteration, the geological age of the Jeongseon Formation, Jeongseon Unit of the Joseon Supergroup (lower Paleozoic) is yet clearly defined by any chronostratigra...
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Article
Eruption age of the Kusandong Tuff in the Cretaceous Gyeongsang Basin, Korea
The Kusandong Tuff has been regarded as a key bed for the subdivision of the Upper Cretaceous strata in the Gyeongsang Basin. Since the Kusandong Tuff has the wide range of the K-Ar whole-rock ages (82∼103 Ma)...
