In-situ observations on semi-brittle behavior of peridotite: Implications for the occurrence of intermediate earthquakes

2016 Fiscal Year Final Research Report

• Project/Area Number: 25707040
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Ehime University
• Principal Investigator: Ohuchi Tomohiro 愛媛大学, 地球深部ダイナミクス研究センター, 講師 (60570504)
• Research Collaborator: NISHIHARA Yu ; LEI Xinglin
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 稍深発地震 / 深発地震 / アコースティック・エミッション / スラブ / 地震発生の素過程 / カンラン石

Outline of Final Research Achievements

The objective of this project is to understand the process of intermediate-depth and deep-focus earthquakes from the viewpoint of mineral physics. To evaluate the semi-brittle behavior of slab-forming rocks (i.e., harzburgite), acoustic emission monitoring is essential as well as measurements on strain and stress at high pressures and high temperatures. Such experimental techniques have been developed by Schubnel et al. (2013), who belong to a French-USA international research group. Our measurement system is now applicable to the semi-brittle behavior of rocks as well as the Schubnel's system. Using our measurement system, axial compression experiments on rocks are possible at high pressures and temperatures. Thus, the process of rock failure will be clarified by our group.

Free Research Field

高圧地球科学