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http://dx.doi.org/10.9719/EEG.2019.52.1.49

Comparison of U-Pb Age Distribution Characteristics of Detrital Zircons in the Age-unknown Geumsusan Formation and Jangsan Formation of the Joseon Supergroup  

Cho, Kyungo (Department of Earth Environmental Sciences, Pukyong National University)
Park, Kye-Hun (Department of Earth Environmental Sciences, Pukyong National University)
Song, Yong-Sun (Department of Earth Environmental Sciences, Pukyong National University)
Choi, Ji Eun (Graduate School of Education, Pukyong National University)
Publication Information
Economic and Environmental Geology / v.52, no.1, 2019 , pp. 49-64 More about this Journal
Abstract
SHRIMP U-Pb ages were analyzed for the detrital zircons separated from the Jangsan Formation of the Lower Paleozoic Joseon Supergroup in the Taebaeksan Basin and the Mungyeong area. Similar to the previously reported from Taebaeksan basin, the detrital zircons show strong peaks near the age of about 1.8-2.0 Ga and about 2.5 Ga. This indicates that the detrital zircons of the Jangsan Formation originated from the basement rocks of the Korean Peninsula. Although the age of the basement rocks on the Korean Peninsula is mainly concentrated in the 1.8-2.0 Ga, the age of about 2.5 Ga is clearly visible in the Jangsan Formation, suggesting that the age distribution of the basement rocks exposed to the surface at that time may be somewhat different from now. The detrital zircons of age-unknown Geumsusan Formation distributed between Danyang and Jecheon also show the U-Pb age distribution with a strong peaks around 1.8-2.0 Ga and 2.5 Ga, which is very similar to that of the Jangsan Formation, suggesting a possibility that the two formations are likely to be correlated.
Keywords
Jangsan Formation; Geumsusan Formation; detrital zircon; U-Pb age; Joseon Supergroup;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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