R8: Metamorphic rocks and tectonics

[R8P-07] Metamorphic textures and garnet REE variation of Fe-Al-rich granulites in north Sør Rondane Mountains, East Antarctica

*Sotaro Baba¹, Yasuhito Osanai², Nobuhiko Nakano², Tomokazu Hokada³, Tatsuro Adachi², Tsuyoshi Toyoshima⁴ (1. University of the Ryukyus, Edu., 2. Kyushu University, 3. National Institute of Polar Research, 4. Niigata University, Sci)

Keywords:Metamorphic textures, Grt REE, Sør Rondane Mountains, granulite

In this presentation, we report the variation of the REE content of garnets in different textures that observed in Fe-Al-rich granulites collected from northwest of the Sør -Rondane Mountains, East Antarctica. Two varieties of garnet occur as porphyroblast, and as corona overgrows on spinel and ilmenite. The REE contents measured using Laser-ICP-MS for garnet porphyroblast and garnet corona show a clear difference between the two varieties. We will discuss the formation of the REE-depleted garnet corona.