1986 Volume 36 Issue 199 Pages 339-350
The trace elements, such as Ba, Sr, and Rb, were systematically used to decipher the differentiation process of the Jurassic and Cretaceous granitic rocks of South Korea.
From Ba, Sr, and Rb relationships of the Cretaceous granitic rocks in both Kyongsang basin and Ogcheon zone, it is suggested that the Cretaceous granitic rocks were mainly formed by fractional crystallization of parental magmas.
Quartz diorite (Jindong granite) in the Kyongsang basin has the chemistry of crystallized melts, as opposed to cumulate-like chemistry. While, granodiorite, adamellite, and granite (Bulgugsa granite, masanite, hypersolvus granite, and Cretaceous granitic rocks in the Ogcheon zone) have the chemistry between crystallized melts and cumulus crystals. This fact suggests that perfect separation of cumulus crystals from intermediate and felsic melts is unlikely, and some trapped intercumulus melt may be anticipated.
