Evolution of Late Cenozoic Magmatism in the NE Honshu Arc and Its Relation to the Crust-Mantle Structures

Yoshida, Takeyoshi; Nakajima, Jun; Hasegawa, Akira; Satō, Hiroshi; Nagahashi, Yoshitaka; Kimura, Jun-Ichi; Tanaka, Akiko; Prima, Oky Dicky Ardiansyah; Ohguchi, Takeshi

doi:10.4116/jaqua.44.195

Cited by 34 publications

(36 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1a). Horst and graben-like structures developed in the Early to Middle Miocene, simultaneously with the opening of the back-arc basin of the Japan Sea (Okamura et al 1995;Yoshida et al 2005;Yamada & Yoshida 2011). Detailed seismological profiles of the arc enable the examination of the deep structures in the island-arc crust.…”

Section: Tectonic Outlinementioning

confidence: 99%

“…From these profiles, two rift systems, which correspond to the surface topography and the geology, can be recognized (Fig. 1b: Sato et al 2004); the Sato 1994 andYoshida et al 2005). (b) Seismic V p structure across the NE Japan arc (Iwasaki et al 2001;Nishisaka et al 2001;Takahashi et al 2004;Sato et al 2004).…”

Section: Tectonic Outlinementioning

confidence: 99%

“…On this basis, the low-velocity zone beneath the Ou Backbone range could be interpreted as a region of partial melting, which would suggest that crustal fluids separating and upwelling from deeper depths are closely related to the active seismic zones. Around the Onikobe caldera in the middle of the Ou Backbone range, the distribution of seismic low-velocity areas, areas of high seismicity and earthquake focal mechanisms are closely related to the distribution of the late Cenozoic calderas (Onodera et al 1998;Umino et al 1998;Nakajima & Hasegawa 2003b;Yoshida et al 2005). There are three levels of low-velocity bodies in the Ou Backbone range: the lower crust, middle crust and upper crust (Fig.…”

mentioning

confidence: 99%

“…(b) Distribution of the late Cenozoic large calderas and Quaternary volcanoes superimposed on a map of positive openness which is one of the thematic maps derived from the 50 m grid-size digital elevation models (Yokoyama et al 1999;Prima et al 2006). Adapted from Yoshida et al (2005). QVF, Quaternary volcanic front; VRE, Quaternary volcanic rear edge; TTL, Tanakura tectonic line; HTL, Hatagawa tectonic line.…”

mentioning

confidence: 99%

“…Integrated study of geology, petrology and geophysics is valuable for revealing processes such as the formation of crust -mantle structures, the origin of the magmas and the geodynamic evolution of the subduction zone system (Iwamori & Zhao 2000;Stern 2002; van Keken 2003;Sato et al 2004;Hasegawa et al 2005;Yoshida et al 2005;Kimura & Yoshida 2006;Yoshida 2009). …”

mentioning

confidence: 99%

See 4 more Smart Citations

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

Yoshida

Kimura

Yamada

et al. 2013

Self Cite

107

View full text Add to dashboard Cite

Abstract:We review the evolution of late Cenozoic magmatism in the NE Japan arc, and examine the relationship between the magmatism and the crust-mantle structure. Recent studies reveal secular changes in the mode of magmatic activity, the magma plumbing system, erupted volumes and magmatic composition associated with the evolution of crust-mantle structures related to the tectonic evolution of the arc. The evolution of Cenozoic magmatism in the arc can be divided into three periods: the continental margin (66-21 Ma), the back-arc basin (21-13.5 Ma) and the island-arc period (13.5-0 Ma). Magmatic evolution in the back-arc basin and the island-arc periods appears to be related to the 2D to 3D change in the convection pattern of the mantle wedge related to the asthenosphere upwelling and subsequent cooling of the mantle. Geodynamic changes in the mantle caused back-arc basin basalt eruptions during the back-arc basin opening (basalt phase) followed by crustal heating and re-melting, which generated many felsic plutons and calderas (rhyolite/granite phase) in the early stage of the island-arc period. This was followed by crustal cooling and strong compression, which ensured vent connections and mixing between deeper mafic and shallower felsic magmas, erupting large volumes of Quaternary andesites (andesite phase).Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.The NE Japan arc is a typical island arc associated with a cold subduction zone. It is one of the most well-known island arcs on Earth and provides a useful model for our understanding of how subduction zones produce magmas, including andesites. The NE Japan arc is related to the westward

show abstract

Section: Tectonic Outlinementioning

confidence: 99%

Section: Tectonic Outlinementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

Yoshida

Kimura

Yamada

et al. 2013

Self Cite

107

View full text Add to dashboard Cite

show abstract

Temporal variation of frictional strength in an earthquake swarm in NE Japan caused by fluid migration

2016

Self Cite

View full text Add to dashboard Cite

Temporal variations of the fault frictional strength was investigated based on the diversity of focal mechanisms in the source area of the Yamagata‐Fukushima border earthquake swarm, a significant earthquake swarm that occurred in central Tohoku, NE Japan, which started just after the 2011 M9.0 Tohoku‐Oki earthquake. The focal mechanisms of events in this swarm activity were determined using P wave polarity data as well as short‐period (1.5–2.5 Hz) waveform data from the direct P wave. The stress field in the source area of this swarm was estimated by applying stress tensor inversions to these focal mechanism data. Based on the estimated stress field, and under the assumption of uniform stress, we calculated relative frictional strengths for individual focal mechanisms. The calculated relative frictional strengths vary over a wide range, but their average value exhibits a characteristic temporal variation, which is at first small, but steadily increases with time for 100 to 150 days, and then becomes approximately constant. We confirmed this characteristic temporal variation of the average relative frictional strength by assuming the stress to be nonuniform. Similar temporal variations of the average relative frictional strength are obtained for even these cases, confirming the variation. The most likely cause for the observed temporal variation of the average relative frictional strength is the temporal variation of the pore fluid pressure in the source area of the swarm, facilitated by the Tohoku‐Oki earthquake and the subsequent fluid diffusion.

show abstract

Temporal Changes in Stress Drop, Frictional Strength, and Earthquake Size Distribution in the 2011 Yamagata‐Fukushima, NE Japan, Earthquake Swarm, Caused by Fluid Migration

et al. 2017

Self Cite

View full text Add to dashboard Cite

In this study, we investigated temporal variations in stress drop and b‐value in the earthquake swarm that occurred at the Yamagata‐Fukushima border, NE Japan, after the 2011 Tohoku‐Oki earthquake. In this swarm, frictional strengths were estimated to have changed with time due to fluid diffusion. We first estimated the source spectra for 1,800 earthquakes with 2.0 ≤ MJMA < 3.0, by correcting the site‐amplification and attenuation effects determined using both S waves and coda waves. We then determined corner frequency assuming the omega‐square model and estimated stress drop for 1,693 earthquakes. We found that the estimated stress drops tended to have values of 1–4 MPa and that stress drops significantly changed with time. In particular, the estimated stress drops were very small at the beginning, and increased with time for ~50 days. Similar temporal changes were obtained for b‐value; the b‐value was very high (b ~ 2) at the beginning, and decreased with time, becoming approximately constant (b ~ 1) after ~50 days. Patterns of temporal changes in stress drop and b‐value were similar to the patterns for frictional strength and earthquake occurrence rate, suggesting that the change in frictional strength due to migrating fluid not only triggered the swarm activity but also affected earthquake and seismicity characteristics. The estimated high Q−1 value, as well as the hypocenter migration, supports the presence of fluid, and its role in the generation and physical characteristics of the swarm.

show abstract

Evolution of Late Cenozoic Magmatism in the NE Honshu Arc and Its Relation to the Crust-Mantle Structures

Cited by 34 publications

References 36 publications

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

Temporal variation of frictional strength in an earthquake swarm in NE Japan caused by fluid migration

Temporal Changes in Stress Drop, Frictional Strength, and Earthquake Size Distribution in the 2011 Yamagata‐Fukushima, NE Japan, Earthquake Swarm, Caused by Fluid Migration

Contact Info

Product

Resources

About