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http://dx.doi.org/10.7854/JPSK.2019.28.4.279

Petrological Study on Small-scale Granites in the Central Part of Yeongnam Massif  

Kim, Hyeong-Gyu (Department of Geology and Research Institute of Natural Sciences, Gyeongsang National University)
Jwa, Yong-Joo (Department of Geology and Research Institute of Natural Sciences, Gyeongsang National University)
Kim, Jae-Hwan (National Research Institute of Cultural Heritage, Cultural Heritage Administration)
Park, Sung-Chul (National Research Institute of Cultural Heritage, Cultural Heritage Administration)
Publication Information
The Journal of the Petrological Society of Korea / v.28, no.4, 2019 , pp. 279-298 More about this Journal
Abstract
Mupung granite, which is located adjacent to Gimcheon granites to the north and Geochang granites to the south, has been known to consist of biotite-hornblende granite (Gbh), porphyritic granite (Gp), and hornblende-biotite granite (Ghb). In this study, we subdivided the Gbh of Mupung granite into biotite granite (Gb) and biotite hornblende granite (Gbh), based on petrological observations. The grayish Gb with medium to coarse grain and porphyritic texture contains a small amount of muscovite, but the hornblende and mafic microgranular enclave (MME) is not observed in Gb. On the other hand, MME can be commonly found in pinkish Gbh. The mafic minerals in Gbh are mostly hornblende and biotite. In the Gb in Mupung granites, the hornblende and sphene (which is the characteristic minerals in Gimcheon granite) are not observed. In addition, the trend of the changes in major elements of Gb in Mupung granites is similar to that of Geochang granites. These petrological characteristics suggest that the Gb in Mupung granite has a similarity with Geochang granite (than Gimchen granite). We also observed that the texture and composition of minerals of Gbh, as well as those of surrounding Gp and Ghb, are consistent with the characteristics of Cretaceous granites in Gyeongsang basin, rather than those of Jurassic granites in Yeongnam massif.
Keywords
Mupung granites; Jurassic granite; Cretaceous granite; Hornblende; Muscovite;
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Times Cited By KSCI : 4  (Citation Analysis)
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