Uplift and denudation history of the Yoro-Suzuka-Nunobiki Mountains, southwest Japan, based on low-temperature thermochronology and tectonics of the eastern margin of the Kinki Triangle

Sueoka, Shigeru   ; Yamada, Kunimi*; Shibata, Kenji; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*

We are attempting to reveal uplift and denudation history of the Yoro-Suzuka-Nunobiki Mountains, eastern margin of the Kinki Triangle, by using apatite fission-track and (U-Th)/He thermochronology. In the eastern margin of the Kinki Triangle, subsiding areas have moved to the north in the past few million years. On the other hand, our the thermochronological data indicate more denudation in the central and southern parts of the Suzuka Range than in the Nunobiki Mountains to the south in the past few million years. This observation can imply basin development and orogenesis of the study area are derived from different mechanisms.