The Present Condition and Future Prospects of the Active Fault Study in Japan.

Yamazaki, Haruo

doi:10.5026/jgeography.103.7_780

Cited by 2 publications

(5 citation statements)

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“…The marginal normal faults form a releasing duplex jog with a separation of 5 km and abruptness of 22". The central faults form a releasing offset jog with a separation of 2 km situated inside Lake Suwa (Yamazaki 1994). Along the Okaya fault, one of the central faults located in the northwest of Lake Suwa, a line of tectonic bulges formed by restraining offset jogs lies on an alluvial fan ( Fig.…”

Section: Suwa Sedimentary Basinmentioning

confidence: 62%

Evolution of fault geometry and development of strike‐slip basins: Comparative studies on the transform zones in Turkey and Japan

Yoshioka

1996

Island Arc

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Although the origins of pull-apart basins and push-up bulges have been discussed by numerous geologists, no discussion has been held on the development process of the basins based on recent active traces and Quaternary chronology. The author has investigated recent fault-active traces and fault topography in the Havza-Ladik, Erbaa-Niksar, Susehri-Golova and Erzincan sedimentary basins along the North Anatolian fault in northern Turkey and the Suwa basin along the Itoigawa-Shizuoka tectonic line (fault system) in central Japan. As a result of this investigation, the locations and sense of deformation of recent active traces seldom coincide with topographic scarps along basin margins in the studied basins. The fault traces have migrated from the basin margins to the center of the basins and become straight. Because of this migration, jogs are extinguished and basins stop subsiding as time passes. Fault topography formed by a strike-slip fault has a certain life span, and the life span is in proportion to the size of the topography. Fault topography formed by various sizes of jogs of a strike-slip fault is formed and extinguished in the corresponding time range, and this extinction is repeated in the course of migration of fault traces.

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Section: Suwa Sedimentary Basinmentioning

confidence: 62%

Evolution of fault geometry and development of strike‐slip basins: Comparative studies on the transform zones in Turkey and Japan

Yoshioka

1996

Island Arc

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“…According to Yamazaki (1994a), study in this period can be divided into the following areas. One area in cluded studies to determine the history and style of individual fault movements for some major faults in Japan.…”

Section: Brief History Of Active Fault Study and Its Social Backgroundmentioning

confidence: 99%

“…Surface breaks intermittently appeared Figure 3. Active faults for which historical reactivating was identified by various paleoseismic studies (Yamazaki 1994a). Numerals indicate the year of events.…”

Section: Japanmentioning

confidence: 99%

“…Future Prospects for Active Fault Study in Japan Yamazaki (1994a) summarized active fault study in Japan as of 1993 and described the problems and future prospects. He pointed out the following three problems:…”

Section: Migration Of the Thrust Front And Landform Evolutionmentioning

confidence: 99%

“…Therefore, this paper reviews the recent trends and features of active fault study and related geomorpholog ical studies which have consistently been the nucleus of tectonic geomorphology in Japan and have always attracted social interest and fulfilled social needs. In the early 1990s, several reviews were published of the tectonic geomor phology and active fault studies (e.g., Kaizuka 1990; Okada and Ikeda 1991;Yamazaki 1994a). This paper describes the recent features and trends of study refering to the previous reviews.…”

Section: Introductionmentioning

confidence: 95%

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Recent Progress in Tectonic Geomorphology in Japan, with Special Reference to Active Fault and Related Tectonic Studies

Yamazaki

1996

Geogr. Rev. Jpn, Ser B

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Abstract:Active fault and related tectonic studies in Japan are chronologically reviewed from the viewpoint of tectonic geomorphology.The future prospects are also described based on the trends of recent progress in active fault study and the surrounding social circumstances.Since the publication of Active Faults in Japan in 1980, the field in Japan has roughly been split into two domains: the reconstruction of detailed fault behavior in Holocene times; and the elucida tion of the relationship between active faults and regional tectonics. The former describes various kinds of fault behavior through the application of the trench excavation method. Although the historical activity has been uncovered on many active faults, the surveys have become increasingly difficult due to the artificial modification of land. New proposed methods such as drilling, however, have not yet developed sufficiently to substitute for trenching. The latter domain discusses various topics related to the characteristics of long-term tectonic behavior from the viewpoint of landform evolution. Studies on the net slip-rate of thrust faults and the migration of thrust fronts have brought new knowledge and ideas to landform geomorphology and seismotectonic research. The morphotectonic and seismotectonic studies in offshore and onshore regions along the Nankai Trough have sufficiently explained the tectonic and landform evolution on the island arc scale in Southwest Japan. Based on present conditions, the author proposes the following directions which should promote progress in active fault study and to utilize the results for hazard mitigation in the future: (1) to distinguish the segmentation structure in the active fault system; (2) to establish seismotectonics models for various regions in Japan; and (3) reconsideration of the recurrence interval of large earthquakes.

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The Present Condition and Future Prospects of the Active Fault Study in Japan.

Cited by 2 publications

References 5 publications

Evolution of fault geometry and development of strike‐slip basins: Comparative studies on the transform zones in Turkey and Japan

Evolution of fault geometry and development of strike‐slip basins: Comparative studies on the transform zones in Turkey and Japan

Recent Progress in Tectonic Geomorphology in Japan, with Special Reference to Active Fault and Related Tectonic Studies

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