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http://dx.doi.org/10.7854/JPSK.2019.28.2.143

SHRIMP Zircon U-Pb Age and Geochemistry of Granites in the Gudambong-Sainam Geosites, Danyang Geopark  

Aum, Hyun Woo (Department of Earth & Environmental Sciences, Chungbuk National University)
Kim, Yoonsup (Department of Earth & Environmental Sciences, Chungbuk National University)
Cheong, Wonseok (Department of Earth & Environmental Sciences, Chungbuk National University)
Hau, Bui Vinh (Department of Earth & Environmental Sciences, Chungbuk National University)
Publication Information
The Journal of the Petrological Society of Korea / v.28, no.2, 2019 , pp. 143-156 More about this Journal
Abstract
We carried out the sensitive high resolution ion microprobe zircon U-Pb age dating and whole rock geochemical analysis of granites in the Gudambong and Sainam geosites, Danyang Geopark. The granites crop out in the western and southern parts of Danyang County, and intruded sedimentary successions of the Yeongweol and Taebaek Groups, respectively. The U-Pb isotopic compositions of zircon from the Gudambong and Sainam granite samples yielded the Cretaceous intrusion ages of $90.4{\pm}0.5Ma(t{\sigma})$ and $90.0{\pm}1.5Ma(t{\sigma})$, respectively. The major and trace elements compositions of the samples showed an affinity of typical A-type granite, indicating their petrogenesis during the late stage of the Bulguksa orogeny or a tectonic dormancy. The geochronologic and geochemical results are identical to those of granites previously reported from the Cretaceous Muamsa and Wolaksan suites.
Keywords
Danyang Geopark; Gudambong; Sainam; Zircon U-Pb ages; Cretaceous; A-type granite;
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