Development of a new method to decipher water contents in ancient magmas using apatite

2014 Fiscal Year Final Research Report

• Project/Area Number: 25610149
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geology
• Research Institution: The University of Tokyo
• Principal Investigator: IIZUKA Tsuyoshi 東京大学, 理学(系)研究科(研究院), 講師 (70614569)
• Co-Investigator(Kenkyū-buntansha): OZAWA Kazuhito 東京大学, 大学院理学系研究科, 教授 (90160853)
• Co-Investigator(Renkei-kenkyūsha): SANO Yuji 東京大学, 大気海洋研究所, 教授 (50162524) ; ORIHASHI Yuji 東京大学, 地震研究所, 助教 (70313046)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: アパタイト / 水 / マグマ / 太古代

Outline of Final Research Achievements

Water plays a fundamental role in environmental change, the evolution of life, mantle dynamics and magmatism on the present Earth. With a longe-range goal of understanding the role of water in ancient magmatism, we have developed a method to estimate water contents in magmas using an accessory mineral, apatite. Specifically, using intrusive rocks in Nosappumisaki of Hokkaido, we have investigated how abundances of hydrogen, fluorine, chlorine and rare earth elements in apatite can be linked to a change in water content with the differentiation of magma.

Free Research Field

地球化学