日本地球惑星科学連合2022年大会

講演情報

[E] ポスター発表

セッション記号 S (固体地球科学) » S-MP 岩石学・鉱物学

[S-MP25] Supercontinents and Crustal Evolution

2022年6月3日(金) 11:00 〜 13:00 オンラインポスターZoom会場 (20) (Ch.20)

コンビーナ:外田 智千(国立極地研究所)、コンビーナ:河上 哲生(京都大学大学院理学研究科)、Satish-Kumar Madhusoodhan(Department of Geology, Faculty of Science, Niigata University)、コンビーナ:Sajeev Krishnan(Centre for Earth Sciences, Indian Institute of Science)、座長:外田 智千(国立極地研究所)

11:00 〜 13:00

[SMP25-P03] Current status and future plan of the geologic study in eastern Dronning Maud Land and Enderby Land, Antarctica

*外田 智千1,2 (1.国立極地研究所、2.総合研究大学院大学)

キーワード:南極、ゴンドワナ

Geology programs of the Japanese Antarctic Research Expedition (JARE) have investigated the area of longitude between 10°E and 55°E (eastern Dronning Maud Land and western Enderby Land) of the Antarctic continent since 1957. Total 39 sheets of the geological maps have been published. This part of the Antarctic continent comprises of deep crustal high-grade metamorphic and plutonic rocks. Main part of this area recorded Neoproterozoic-early Cambrian (>600-520 Ma) metamorphic events (central Dronning Maud Land, Sør Rondane Mountains, Yamato-Belgica Complex, Lützow-Holm Complex, Western Rayner Complex). To the east, Archaean-early Palaeoproterozoic (>2550-2480 Ma) UHT metamorphic terrane of the Napier Complex, and Meso-Neoproterozoic (1000-900 Ma) granuliute terranes of the Rayner Complex and the Cape Hinode Block are distributed (e.g., Shiraishi et al., 2008; Dunkley et al., 2020; and references therein).
This presentation summarizes the current status of the geologic studies of this part of Antarctica with their implications to supercontinent evolution, and discuss the future planning of Antarctic field programs expected to start from 2023- seasons.