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http://dx.doi.org/10.5467/JKESS.2017.38.1.49

Geochemical Characteristics of the Jurassic Chunyang Granites in Northeastern Part of the Yeongnam Massif  

Kang, Minyoung (Towol High School)
Kim, Yunji (Department of Earth Science Education, Daegu University)
Wee, Soomeen (Department of Earth Science Education, Korea National University of Education)
Publication Information
Journal of the Korean earth science society / v.38, no.1, 2017 , pp. 49-63 More about this Journal
Abstract
The geochemical results of the Chunyang granites located in the northeastern part of the Yeongnam Massif, indicate that these rocks have characteristics of calc-alkaline series in the sub-alkaline field, I-type and peraluminous. Most of the geochemical features in major and trace elements show systematic trends, which are similar to differentiation trends of the general Jurassic granitoids in South Korea. The Chunyang granite is largely enriched in mobile LILE (Sr, K, Rb and Ba) relatively immobile HFSE. They show LREE enriched patterns [$(La/Lu)_{CN}=41.8-73.2$] with a slightly negative Eu anomaly [$(Eu/Eu^*)_{CN}=0.89-1.10$]. There are no meaningful correlations in major and trace elements between the Chunyang granites and the Buseok plutonic rock which is the main unit of the Yeongju batholith. This result may suggest that these two plutonic rocks be not derived from the same parent magma. Tectonic discrimination diagrams indicate that the Chunyang granite was formed in volcanic arc environments. These geochemical characteristics results suggest that the Chunyang granite must have been generated at the active continental margin during the subduction of the Jurassic proto-Pacific plate.
Keywords
Chunyang granite; Jurassic granite; calc-alkaline; I-type;
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Times Cited By KSCI : 5  (Citation Analysis)
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