Mangerite magmatism associated with a probable Late-Permian to Triassic Hongseong–Odesan collision belt in South Korea

• DOI: 10.1016/j.gr.2005.06.005
• Publication Date: 2006-01-10T12:08:03Z
• Authors: Chang Whan Oh; Sajeev Krishnan; Sung Won Kim; Yong Wan Kwon
• Keywords: Lile; Felsic

Abstract The Odesan area in the eastern Gyeonggi Massif, South Korea, consists principally of migmatitic and porphyroblastic gneisses intruded by mangerite. Mafic mangerites with SiO 2 contents from 52.40 to 54.20 wt.% have higher FeO* + MgO (14.98–18.28 wt.%) and CaO contents (5.80–7.84 wt.%) but lower total alkali contents (4.74 2 O + K 2 O 2 2 O + K 2 O