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Sakai, Toru*; Kametaka, Masao*; Aoki, Kazuhiro; Shimada, Koji; Takagi, Hideo*
Chishitsugaku Zasshi (Internet), 130(1), p.89 - 109, 2024/04
Shear planes are formed in various orientations within fault fracture zones. The sense of shear on each shear plane can be determined from the composite planar fabrics developed around it. However, it is not possible to distinguish whether all the shear planes in a fault fracture zone were formed during the same stage of motion by observations alone, because of the scarcity of chronological data. As such, we attempted to determine the kinematic and stress histories of the Shionohira and Kuruma faults by using both observations of composite planar fabrics and stress inversion analysis. As a result, we identified five stages of motion on the Shionohira Fault and two stages of motion on the Kuruma Fault. The chronological data are not sufficient to constrain the timing of the stages, but the reconstructed histories are consistent with the paleostress fields and tectonic activity around these faults, as determined in previous studies. Although the reconstructed stress history depends on the density of fault-slip data from the measurement area, this method is effective for investigating the formation mechanisms of fault fracture zones.
Aoki, Kazuhiro; Tanaka, Yukumo; Yoshida, Takumi; Shimada, Koji; Sakai, Toru*; Kametaka, Masao*; Seshimo, Kazuyoshi
Oyo Chishitsu, 62(2), p.64 - 81, 2021/06
Co-seismic surface ruptures in the Fukushima-ken Hamadori Earthquake of Mw 6.7 on April 11, 2011 exposed approximately 14 km trending NNW-SSE from Nameishi to northwest of Ishizumi Tsunaki of Tabito Town, Iwaki City and were newly named the Shionohira Fault. However, no surface ruptures appeared along an N-S trending active Kuruma fault extending 5 km south of the Shionohira Fault. Because of the proximity and similar strike, two locations in Shionohira Fault and one location in Kuruma fault were selected as the study area for the fault activity evaluation. The present study reports the results of a series of geological and drilling surveys, core observation, XRD, isotope, and fluid inclusion analyses, and water permeability test. The results obtained from the three locations offer a fundamental data base that can be utilized for fault activity evaluation by summarizing the geological, mineralogical, and fluid property characteristics of fault fracture zone.
Tanaka, Yoshihiro*; Kametaka, Masao*; Okazaki, Kazuhiko*; Suzuki, Kazushige*; Seshimo, Kazuyoshi; Aoki, Kazuhiro; Shimada, Koji; Watanabe, Takahiro; Nakayama, Kazuhiko
Oyo Chishitsu, 59(1), p.13 - 27, 2018/04
This paper aims to develop a methodology for understanding the fault activity by observing exposed fault planes without covering younger strata. Based on purpose, faults developed in relatively homogeneous rocks such granitic types are investigated as follows; Gosuke Dam upstream outcrop of Gosukebashi Fault and Funasaka-nishi outcrop of Rokkou Fault were selected for the study of an active fault; and K-3 outcrop of Rokkou Houraikyo Fault was chosen for a non-active fault.
Shimada, Koji; Kametaka, Masao*; Nakayama, Kazuhiko; Seshimo, Kazuyoshi; Tanaka, Yoshihiro; Hayashi, Toshio*; Tanaka, Yukumo; Shimogama, Kota*; Okazaki, Kazuhiko*
Chishitsugaku Zasshi, 119(11), p.727 - 731, 2013/11
Staples for a stapler can be used as a frame of a small oriented sample taken from fragile and scarce fault gouge. The fault gouge was slotted for staples of an insert. Staples are a group of about ten or less ones holding right-angled three small surfaces. Pre-oriented staples set the slot would remove then presented for the SEM observation. Only a knife, some glues and simple equipment are needed for the method in the field or laboratories.
Kametaka, Masao*; Nakayama, Kazuhiko; Aoki, Kazuhiro; Seshimo, Kazuyoshi; Shimada, Koji; Tanaka, Yoshihiro; Okazaki, Kazuhiko*; Funato, Akio*; Hayashi, Toshio*
no journal, ,
no abstracts in English
Kametaka, Masao*; Sakai, Toru*; Inada, Noriyuki*; Tanaka, Yumiko*; Okazaki, Kazuhiko*; Suzuki, Yuji*; Aoki, Kazuhiro; Tanaka, Yoshihiro; Seshimo, Kazuyoshi; Nakayama, Kazuhiko
no journal, ,
no abstracts in English
Aoki, Kazuhiro; Seshimo, Kazuyoshi; Tanaka, Yoshihiro; Kametaka, Masao*; Sakai, Toru*; Okazaki, Kazuhiko*; Shimamoto, Toshihiko*
no journal, ,
no abstracts in English
Shimizu, Mayuko; Niwa, Masakazu; Aoki, Kazuhiro; Kametaka, Masao*
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no abstracts in English
Suzuki, Yuji*; Kametaka, Masao*; Murata, Seiichi*; Aoki, Kazuhiro; Tanaka, Yoshihiro; Seshimo, Kazuyoshi; Sakai, Toru*
no journal, ,
no abstracts in English
Sakai, Toru*; Kametaka, Masao*; Tanaka, Yumiko*; Aoki, Kazuhiro; Tanaka, Yoshihiro; Niwa, Masakazu; Seshimo, Kazuyoshi
no journal, ,
no abstracts in English
Kametaka, Masao*; Sakai, Toru*; Tanaka, Yumiko*; Aoki, Kazuhiro; Tanaka, Yoshihiro*; Seshimo, Kazuyoshi; Niwa, Masakazu; Masuda, Yuki
no journal, ,
no abstracts in English
Aoki, Kazuhiro; Seshimo, Kazuyoshi; Tanaka, Yoshihiro*; Niwa, Masakazu; Masuda, Yuki; Kametaka, Masao*; Sakai, Toru*; Shimamoto, Toshihiko*
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no abstracts in English
Aoki, Kazuhiro; Seshimo, Kazuyoshi; Sakai, Toru*; Komine, Yusuke*; Kametaka, Masao*; Watanabe, Takahiro; Nussbaum, C.*; Guqlielmi, Y.*
no journal, ,
Kametaka, Masao*; Tanaka, Yumiko*; Iwasaki, Etsuo*; Aoki, Kazuhiro; Tanaka, Yukumo; Yoshida, Takumi; Seshimo, Kazuyoshi
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no abstracts in English
Seshimo, Kazuyoshi; Aoki, Kazuhiro; Kametaka, Masao*; Nussbaum, C.*; Shimamoto, Toshihiko*; Ma, S.*; Yao, L.*
no journal, ,
no abstracts in English
Aoki, Kazuhiro; Seshimo, Kazuyoshi; Guglielmi, Y.*; Nussbaum, C.*; Shimamoto, Toshihiko*; Ma, S.*; Yao, L.*; Kametaka, Masao*; Sakai, Toru*
no journal, ,
Seshimo, Kazuyoshi; Aoki, Kazuhiro; Tanaka, Yukumo; Niwa, Masakazu; Shimamoto, Toshihiko*; Ma, S.*; Yao, L.*; Kametaka, Masao*
no journal, ,
Watanabe, Takahiro*; Tanaka, Yukumo; Aoki, Kazuhiro; Guglielmi, Y.*; Cook, P.*; Soom, F.*; Wakahama, Hiroshi*; Nojo, Haruka*; Iwasaki, Etsuo*; Kametaka, Masao*; et al.
no journal, ,
no abstracts in English
Aoki, Kazuhiro; Wakahama, Hiroshi*; Nojo, Haruka*; Iwasaki, Etsuo*; Kametaka, Masao*; Tanaka, Yukumo; Yoshida, Takumi; Seshimo, Kazuyoshi
no journal, ,
no abstracts in English
Nakayama, Kazuhiko; Shimada, Koji; Seshimo, Kazuyoshi; Tanaka, Yoshihiro; Kametaka, Masao*; Okazaki, Kazuhiko*; Shimogama, Kota*; Hayashi, Toshio*
no journal, ,
no abstracts in English
