A modified time-temperature relationship for titanomagnetite and its application to igneous erratic boulders in Hachijo Island, Japan

Takayuki Tonosaki1, Norihiro Nakamura1, Kazuhisa Goto2, Tetsuro Sato1 and Masashi Watanabe3, (1)Tohoku University, Sendai, Japan, (2)Tokyo University, Department of Earth and Planetary Science, Tokyo, Japan, (3)Chuo University, Faculty of Science and Engineering, Tokyo, Japan