R8: Metamorphic rocks and tectonics

[R8P-14] Deformation characteristics of antigorite serpentinites exposed at Sasaguri area, Fukuoka Prefecture

*Yuki Iwasaki¹, Jun-ichi Ando¹, Das Kaushik¹, Dyuti Prakash Sarkar¹, Seiichiro Uehara², Hiroaki Ohfuji³ (1. Hiroshima Uni. Sci., 2. Kyushu Uni. , 3. Ehime Uni.)

Keywords:Antigorite, Plasticity, microstructure

The purpose of this study is to clarify the deformation characteristics of the antigorite serpentinites from Sasaguri area, Fukuoka Prefecture. The CPO of antigorite is characterized by [010]-concentration parallel to the lineation, and (001)-concentration normal to the foliation. The important phenomena that proceed with deformation are creation of defect-induced undulose extinction, followed by the grain size reduction and creation of CPO.