日本地球惑星科学連合2015年大会

講演情報

口頭発表

セッション記号 P (宇宙惑星科学) » P-PS 惑星科学

[P-PS23] 月の科学と探査

2015年5月25日(月) 16:15 〜 18:00 A02 (アパホテル&リゾート 東京ベイ幕張)

コンビーナ:*長岡 央(早稲田大学先進理工学部)、諸田 智克(名古屋大学大学院環境学研究科)、Masaki N Nishino(Solar-Terrestrial Environment Laboratory, Nagoya University)、本田 親寿(会津大学)、長 勇一郎(立教大学理学部)、座長:晴山 慎(聖マリアンナ医科大学生理学教室(物理学分野))、山田 竜平(国立天文台 RISE月惑星探査検討室)

17:30 〜 17:33

[PPS23-P01] 月の巨大衝突構造における海の火成活動

ポスター講演3分口頭発表枠

*田口 雅子1諸田 智克1加藤 伸祐1 (1.名古屋大学大学院環境学研究科)

Toward an understanding of the evolution of the Earth and other terrestrial planets, it is important to study the thermal evolution of the Moon. Estimate of volumes and eruption ages of lava ponds is essential to construct the volcanic history of the Moon. Therefore, these estimates have been performed in the lunar maria, a lowland area covered with basalt.
The South Pole-Aitken (SPA) basin, located on southern lunar farside, is one of the oldest and largest impact structures in the solar system. The basin ranges ~13 km in depth, and its rim crest diameter is about 2500 km. Previous studies of numerical simulation for SPA-forming impact indicate that the large impact generated a melting zone ranging 500 km depth and changed the thermal condition of the underlying mantle.
In order to evaluate the effect of the SPA-forming impact on volcanic activity, we estimated the thickness and the volumes of lava ponds of Apollo, Leibnitz, Ingenii, located within the SPA, using high-resolution image data obtained by Kaguya. Volumes of these maria were estimated as 4440-7330 km3, 4880-12580 km3, and 5830-53570km3, slightly smaller than estimate of previous study. In comparing the volumes of lava ponds of northern lunar farside, there is no significant difference, suggesting that SPA-forming impact did not contribute to magma production.