High-K adakitic granite in post-Gondwana collisional stage: example for the Vengen Granite, Sør Rondane Mountains, East Antarctica

The Vengen Granite, one of early Paleozoic granitic rocks crops out the southern end ridge, Kanino-tsume Peak at Main Shear Zone (MSZ) Sør Rondane Mountains, East Antarctica. This granite is composed medium- to fine-grained mylonitic biotite and cuts MSZ Zone. two-mica dykes locally intrude Granite. have foliations parallel Granite plagioclase, quartz, K-feldspar, biotite, muscovite with trace amounts titanite, allanite, apatite, zircon opaques as accessory minerals. geochemically characterized by a high-K content, which resembles adakitic affinity. These chemical data combined rare earth elements Sr-Nd isotope geochemistry suggest that source magma was derived from partial melting meta-tonalite minor pelitic gneisses in SW-terrane subducted under NE-terrane during collision West Gondwana continents.