Emplacement processes of large submarine lava flows

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400446
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: Kanazawa University
• Principal Investigator: Umino Susumu 金沢大学, 自然システム学系, 教授 (30192511)
• Co-Investigator(Kenkyū-buntansha): KANAYAMA Kyoko 金沢大学, 理工研究域, 研究員 (80707688) ; KUSANO Yuki 産業技術総合研究所, 地質調査総合センター, 研究員 (00635972)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 巨大海底溶岩流 / オマーンオフィオライト / 巨大海台 / 流動・定置メカニズム / 冷却固化過程 / 噴火時間 / 産状

Outline of Final Research Achievements

The V3 Volcanic rocks of the Oman Ophiolite are thick submarine lava flows exceeding an estimated volume of several cubic kilometers. The V3 flow field consists of massive cores sandwiched between columnar jointed lava crusts. The V3 flow is divided into the Upper and the Lower flow by the intervening pillow lava and shale. Yb variation of the lower flow is consistent with the internal growth of inflating sheet where newly supplied lava was injected into the core of the flow, whereas the upper flow was empalced lobe by lobe one after the top of the other, which were welded togher to form a massive sheet-like lava.

Free Research Field

火山学・岩石学