10.1111/(ISSN)1440-1738 1038-4871 1440-1738 Island Arc Island Arc 10.1111/iar.2016.25.issue-4 © John Wiley & Sons Australia, Ltd 25 4 July 2016 10.1111/iar.12152 Pictorial Pictorial © 2016 John Wiley & Sons Australia, Ltd 298 300 Correspondence: AIST Tsukuba Central 7, Higashi‐1‐1‐1, Tsukuba 305‐8567, Japan (email: otsubo‐m@aist.go.jp). Otsubo, M., Shimizu, T., Miyakawa, A., Sato, T., Ohwada, M., and Kazahaya, K. (2016) Fractures in Cretaceous granite as pathways of upwelling deep‐seated water at Kawachinagano City on Kii Peninsula, southwest Japan. Island Arc, 25: 298–300. doi: 10.1111/iar.12152. Fractures in Cretaceous granite as pathways of upwelling deep‐seated water at Kawachinagano City on Kii Peninsula, southwest Japan 大阪府河内長野地域の白亜紀花崗岩体における深部流体上昇の通路としての亀裂群 Fractures as pathways of deep‐seated water M. Otsubo et al. MakotoOtsubo ToruShimizu AyumuMiyakawa TsutomuSato MichikoOhwada KoheiKazahaya Geological Survey of Japan AIST
Tsukuba Ibaraki 305‐8567 Japan

In this paper, we discuss the relationship between fracture/vein orientation and the upwelling of deep‐seated water at the Shiotakibashi outcrop, Osaka prefecture, SW Japan. The dilation tendency calculations are performed on these fractures to identify potential fluid conduits under the present stress field. The measured fractures that host flowing fluids are favorable pathways for deep‐seated fluids under the present stress field.