Understanding the process of spherical carbonate concretions formation and its application to civil engineering

2018 Fiscal Year Final Research Report

• Project/Area Number: 15H04224
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Earth system and resources engineering
• Research Institution: Nagoya University
• Principal Investigator: Yoshida Hidekzau 名古屋大学, 博物館, 教授 (30324403)
• Co-Investigator(Kenkyū-buntansha): 南 雅代 名古屋大学, 宇宙地球環境研究所, 准教授 (90324392) ; 城野 信一 名古屋大学, 環境学研究科, 准教授 (20332702) ; 丸山 一平 名古屋大学, 環境学研究科, 教授 (40363030)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: コンクリーション / 炭酸カルシウム / 続成作用

Outline of Final Research Achievements

Based on the study, the process of spherical concretions formation was revealed as follows; 1)spherical carbonate concretions are only found in marine sediments. 2)Sphere is formed by the diffusive process. 3)The reason why carbonate has been accumulated, is the process by the reaction with carbon and calcium in the sea water. 4)The fossils inside was well preserved, because of the reason by self sealing. 5)The reaction of carbon and calcium to form concretions is quite rapidly that before we had thought.

Free Research Field

応用地質

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、球状コンクリーションの形成メカニズムを明らかにしただけでなく、そのプロセスを土木工学などの分野に応用可能であることを示したことである。とくに炭酸カルシウムによる閉塞効果などはあまりこれまで考えてこられなかったものであり、今後の応用性が期待される。