Mantle evolution in planets: a systematic numerical study based on a three-dimensional spherical model

2017 Fiscal Year Final Research Report

• Project/Area Number: 25287110
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: Ogawa Masaki 東京大学, 大学院総合文化研究科, 准教授 (30194450)
• Co-Investigator(Kenkyū-buntansha): 柳澤 孝寿 国立研究開発法人海洋研究開発機構, その他, 研究員 (20359186) ; 宮腰 剛広 国立研究開発法人海洋研究開発機構, 地球深部ダイナミクス研究分野, 主任研究員 (60435807)
• Co-Investigator(Renkei-kenkyūsha): Kameyama Masanori 愛媛大学, 地球深部ダイナミクス研究センター, 教授 (70344299)
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: マントル進化 / 火成活動 / マントル対流 / プレートテクトニクス / 比較惑星 / 数値モデリング

Outline of Final Research Achievements

We first explored how the mantle evolves through its 4.5 billion year-history in terrestrial planets of various sizes as a consequence of magmatism and mantle convection, based on a series of two-dimensional numerical simulation. Through these works, we identified the elementary processes that dominate mantle evolution such as formation of global scale structure by tectonic plates and a positive feedback that operates between magmatism and upwelling flow of the solid-mantle. Then, we developed three-dimensional numerical models of magmatism and mantle convection including plate tectonics to see if these processes operate in a three-dimensional spherical mantle to shape the mantle evolution in the manner expected from our two-dimensional studies.

Free Research Field

固体惑星科学