Miocene stratigraphy, sedimentary environments and tectonics in the Wajima area, Noto Peninsula, southern margin of the Japan Sea

博文, 小林; 敦, 山路; 富士雄, 増田

doi:10.5575/geosoc.111.286

Cited by 20 publications

(8 citation statements)

References 27 publications

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“…2(a)), a similar deformation trend was reported for the Japan Sea coast. Kobayashi et al (2005) showed that NW-SE grabens had developed on the northeastern part of southwest Japan in the Early Miocene. This structural trend may be attributed to a divergent stress regime during the initial stage of back-arc rifting, which will be discussed in Section 4.…”

Section: Miocene Stress Regimesmentioning

confidence: 98%

Seismic evidence of divergent rifting and subsequent deformation in the southern Japan Sea, and a Cenozoic tectonic synthesis of the eastern Eurasian margin

Itoh

Uno

Arato

2006

Journal of Asian Earth Sciences

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Section: Miocene Stress Regimesmentioning

confidence: 98%

Seismic evidence of divergent rifting and subsequent deformation in the southern Japan Sea, and a Cenozoic tectonic synthesis of the eastern Eurasian margin

Itoh

Uno

Arato

2006

Journal of Asian Earth Sciences

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“…Although the dikes in the study area of about 15 km long are compatible with the single stress tensor, the spatial and temporal stability of stress state should be investigated in the future works. In the Noto Peninsula, the tectonic blocks recognized by Kobayashi et al (2005) are several kilometers in size, and the growth normal faults described by Yoshikawa et al (2002) imply that the NW-SE trending extensional stress continued from 25 Ma to 19 Ma.…”

Section: Discussionmentioning

confidence: 93%

Parametric and non-parametric statistical approaches to the determination of paleostress from dilatant fractures: Application to an Early Miocene dike swarm in central Japan

2013

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Several methods have been proposed for determining paleostress states from orientations of dilatant fractures such as dikes and veins. Recently a stochastic inversion method was invented to objectively estimate the principal stress axes and the stress ratio. Whether a fracture is dilated or not is controlled by the balance of the fluid pressure and the normal stress acting on it. The magnitude of normal stress depends on the fracture orientation, which causes anisotropic orientation distribution of dilatant fractures. The inversion method assumes that the orientation distribution of fractures can be approximated by a Bingham distribution, an exponential probability distribution on the unit sphere, of which symmetric axes are interpreted as the principal stress axes. However, it is unknown if the exponential type of distribution function is suitable or not. Here, we examine the distribution functions and propose two improved methods. One method uses the shifted power-law function as the shape of probability distribution, which is more

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“…Therefore, extensional deformation is inferred to have ceased at ca 16 Ma in the Kuma area. Early Miocene graben fill in the Wajima area, northern Noto Peninsula (Figure 1), is older than the Higashi-Innai Formation (Kobayashi et al, 2005), which is correlated to an age of ca 16.5 Ma (Yoshikawa et al, 2002).…”

Section: Extensional Tectonics In the Sw Japan Arcmentioning

confidence: 99%

“…Early Miocene grabens have also been found onshore and offshore of SW Japan (Itoh, Nakajima, & Takemura, 1997; Itoh, Uno, & Arato, 2006; Yamasaki, 1998; T. Sato et al, 2006). However, the termination of map‐scale extensional deformation in SW Japan is unclear because the onshore grabens are much less numerous in this area compared with NE Japan (Kobayashi, Yamaji, & Masuda, 2005; Kusuhashi & Yamaji, 2001; Yoshida, 1992; Yoshida, Takahashi, & Nishioka, 1995).…”

Section: Introductionmentioning

confidence: 99%

Termination of intra‐arc rifting at ca 16 Ma in the Southwest Japan arc: The tectonostratigraphy of the Hokutan Group

Haji

Yamaji

2020

Island Arc

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Miocene intra-arc rifting associated with the opening of the Japan Sea formed grabens in several areas in Southwest (SW) Japan, but the extensional tectonics of the arc are still not well understood. In this study, we first document the tectonostratigraphy of the Hokutan Group in the northwestern part of the Kinki district, and demonstrate the termination of extensional tectonics at ca 16.5 Ma, as inferred from grabens in the lower part of the group being unconformably overlain by sediments of the upper part. Second, we review early Miocene grabens in SW Japan to suggest that intra-arc rifting was abandoned at ca 16 Ma, essentially simultaneously with the end of rotation of the SW Japan arc as evidenced by paleomagnetic studies. The lesser numbers of grabens and reduced thicknesses of graben fills suggest that extensional deformation of the SW Japan arc was significantly weaker than that of the Northeast (NE) Japan arc, which was broken into blocks, indicating various degrees of paleomagnetic rotation within NE Japan. The weak deformation has allowed paleomagnetic studies to infer the coherent rotation of the SW Japan arc.

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Miocene stratigraphy, sedimentary environments and tectonics in the Wajima area, Noto Peninsula, southern margin of the Japan Sea

Cited by 20 publications

References 27 publications

Seismic evidence of divergent rifting and subsequent deformation in the southern Japan Sea, and a Cenozoic tectonic synthesis of the eastern Eurasian margin

Seismic evidence of divergent rifting and subsequent deformation in the southern Japan Sea, and a Cenozoic tectonic synthesis of the eastern Eurasian margin

Parametric and non-parametric statistical approaches to the determination of paleostress from dilatant fractures: Application to an Early Miocene dike swarm in central Japan

Termination of intra‐arc rifting at ca 16 Ma in the Southwest Japan arc: The tectonostratigraphy of the Hokutan Group

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