14:00 〜 14:15
[R7-01] 海洋地殻構造が示すプレート拡大モードの解明―ハワイ沖モホール候補地における上部海洋地殻貫通計画
キーワード:国際深海科学掘削計画、深海掘削、ハワイ沖ノースアーチ、上部地殻構造、巨大山体崩壊
We propose to drill a complete upper crustal section and into the uppermost gabbros in 80 Ma crust spread at 8 cm/a on the North Arch off-Hawaii. The drilling is specifically designed to understand the relationships between the style of crustal extension and the architecture of the upper crust, and the physical and chemical evolution of oceanic lithosphere with special reference to the Moho diversity and the North Arch, which provide crucial information on the Earth’s evolution.