Presentation Information
[R8P-10]Detrital zircon U-Pb age and metamorphic thermal structure of the Yokokawagawa metamorphic rocks in central Japan
*Hiroshi Mori1, Hiroki Mizumura2, Tetsuya Tokiwa1, Kohei Yoshikawa1, Yuki Nobe3, Yui Kouketsu4 (1. Shinshu Univ., 2. Kyowa Sekkei, 3. Electric Power Development, 4. Nagoya Univ.)
Keywords:
Yokokawagawa,Sanbagawa,detrital zircon U-Pb dating,Raman carbonaceous material geothermometry
The Yokokawagawa metamorphic rocks (YMR) are commonly considered as a part of the Sanbagawa metamorphic rocks (SMR), but there is no consensus on the attribution of the YMR. In this study, we conducted detrital zircon U-Pb dating and metamorphic thermal analysis on the YMR. The results of the U-Pb dating imply that the depositional age is ~100 Ma or later and the temperatures estimated with Raman carbonaceous material geothermometry were ~350–380 ºC. These are consistent with results of the SMR, supporting the idea that the YMR attributes to the SMR.
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