R6: Plutonic rocks, volcanic rocks and subduction factory

[R6P-06] Simultaneously quantitave determination of U-Pb age and titanium concentration: case study of Kurobegawa granite.

*Kozue Ishibashi¹, Shuhei Sakata², Hayato Yamazaki¹, Takashi Yuguchi¹ (1. Yamagata Univ., 2. Tokyo Univ.)

Keywords:Zircon, U-Pb age, Ti in zircon thermometer, CL image, LA-ICP-MS

This study presents procedures and results of simultaneous determination of zircon U-Pb age and titanium concentration on the thin section (without zircon separation) using LA-ICP-MS. Such simultaneous determination gives crystallization age and temperature in the granitic magma, and the variations of them within the zircon crystal reveal the quantitative thermal evolution of the granitic magma. Our discussions include combination of age, temperature and internal structure due to cathodoluminescence observation in the target zircon.