28 Result(s)
within
Article
Yong Il Lee
English
-
Article
Mineralogy and geochemistry of clastic sediments of the Terani Formation, Cauvery Basin, southern India: implications for paleoweathering, provenance and tectonic setting
Mineralogical and geochemical (major, trace and rare earth elements) studies were carried out on the clay samples of the Terani Formation, South India to investigate the paleoweathering, source rocks character...
-
Article
Open AccessTerrestrial biome distribution in the Late Neogene inferred from a black carbon record in the northeastern equatorial Pacific
The appearance and expansion of C4 plants in the Late Cenozoic was a dramatic example of terrestrial ecological change. The fire hypothesis, which suggests fire as a major cause of C4 grassland is gaining support...
-
Article
Open Access25th Annual Computational Neuroscience Meeting: CNS-2016
A1 Functional advantages of cell-type heterogeneity in neural circuits
-
Article
Carbon, oxygen and strontium isotopic signatures in Maastrichtian-Danian limestones of the Cauvery Basin, South India
A petrographic, carbon, oxygen and strontium study of the carbonate succession of the shallow marine Kallankurichchi and Niniyur formations of the Cauvery Basin, Tamil Nadu, India was conducted to understand t...
-
Article
Diagenesis of braided fluvial sandstones and its implications for prediction of reservoir quality: a case study on the Neogene Shawan Formation, Junggar Basin, NW China
This study states the spatial and temporal distribution of diagenetic alterations and their influence on reservoir quality in the lower member of Shawan sandstones of the Chepaizi Uplift in the Junggar Basin, ...
-
Article
K-Ar dating of illites for time constraint on tectonic burial metamorphism of the Jurassic Nampo Group (West Korea)
The timing of tectonic burial metamorphism of the early Mesozoic Nampo Group (western Korea) related to the Jurassic Daebo orogeny was first constrained by K-Ar dating of illite in sedimentary rocks. Two shale...
-
Article
Comparison of radiocarbon and OSL dating methods for a Late Quaternary sediment core from Lake Ulaan, Mongolia
Both radiocarbon and optically stimulated luminescence (OSL) dating methods were applied to test their suitability for establishing a chronology of arid-zone lacustrine sediments using a 5.88-m-long core drill...
-
Article
Carbon and nitrogen isotope composition of vegetation on King George Island, maritime Antarctic
We report abundance of 13C and 15N contents in terrestrial plants (mosses, lichens, liverworts, algae and grasses) from the area of Barton Peninsula (King George Island, maritime Antarctic). The investigated plan...
-
Article
Core-based reconstruction of paleoenvironmental conditions in the southern Drake Passage (West Antarctica) over the last 150 ka
A deep-sea sediment core (GC98-06) from the southernmost Drake Passage, West Antarctica, shows late Quaternary depositional environments distinctly different from sedimentary drifts commonly found along the so...
-
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)...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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...
-
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-...
-
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...
