• Journal of the Korea Institute of Building Construction
• /
• v.5 no.4 s.18
• /
• pp.4-10
• /
• 2005

• Construction Engineering and Management
• /
• v.5 no.5 s.21
• /
• pp.41-45
• /
• 2004

• The Journal of the Korean dental association
• /
• v.24 no.1 s.200
• /
• pp.5-5
• /
• 1986

• Journal of Power System Engineering
• /
• v.12 no.5
• /
• pp.5-13
• /
• 2008

• Korean Medical Education Review
• /
• v.5 no.2
• /
• pp.35-40
• /
• 2003

• Korean Medical Education Review
• /
• v.5 no.2
• /
• pp.23-28
• /
• 2003

• The Science & Technology
• /
• v.15 no.5 s.156
• /
• pp.40-41
• /
• 1982

• Construction Engineering and Management
• /
• v.18 no.5
• /
• pp.3-5
• /
• 2017

• Proceedings of the CALSEC Conference
• /
• 2003.09a
• /
• pp.1-7
• /
• 2003

Ubiquitous Computing ■5C (ㆍComputing ㆍConnectivity ㆍCommunication ㆍContent ㆍCalm ■5Any (ㆍAnytime ㆍAnywhere ㆍAnynetwork ㆍAnydevice ㆍAnyservice)(omitted)

• The Journal of the Petrological Society of Korea
• /
• v.21 no.1
• /
• pp.31-45
• /
• 2012

We investigated the various lithologies and zircon U-Pb ages of metasedimentary rocks from the Yeongheung-Seonjae-Daebu Islands, western Gyeonggi Massif, whose geologic and geochronologic features are poorly constrained in spite of their significance for tectonic interpretation. Major lithology consists of quartzites or meta-sandstones commonly alternating with semi-pelitic schists, together with lesser amounts of calcareous sandstones with matrix-supported quartzite clasts, calcareous schists, and pelitic schists. Pelitic schists uncommonly contain large porphyroblasts of garnet as well as quartz veins with large crystals of muscovite and andalusite or kyanite. SHRIMP U-Pb ages of detrital zircons from two analyzed metasandstones define four age populations: Neoarchean (~2.5 Ga), Paleoproterozoic (~2.0-1.5 Ga), Neoproterozoic (~1.1-0.7 Ga), and Early Paleozoic (~560-400 Ma). The youngest zircon ages are clustered at ~420 Ma. These results suggest that the deposition of meta-sandstones took place after the Silurian, possibly during the Devonian, and are analogous to those of the Taean Formation reported from the western part of the Gyeonggi Massif. Moreover, The age distribution patterns of detrital zircons and the Barrovian-type metamorphic facies of pelitic schists are similar to those reported from the Imjingang belt, suggesting that the Taean Formation likely corresponds to southwestward extension of the Imjingang Belt.