Age of Subducting Lithosphere and Back-Arc Basin Formation in the Western Pacific Since the Middle Tertiary

Seno, Tetsuzo

doi:10.1007/978-94-009-4720-7_21

Cited by 18 publications

(19 citation statements)

References 21 publications

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“…The present discussion is illustrated by the reconstruction by Seno and Maruyama [37] and Seno [20] which belongs to the latter group of models (Figs. 4 and 5).…”

Section: Plate-tectonic Reconstruction and The History Of Subductionmentioning

confidence: 83%

“…2) this indicates that at large depths subducted lithosphere below the Izu-Bonin arc is not continuous in a simple way to the slab below the Mariana arc. The age of subducting lithosphere is an important control in the subduction process [19], but the increase from about 135 Ma at the northern Izu-Bonin trench to over 150 Ma at the Mariana trench [20] is too small to explain the lateral variations in the Wadati-Benioff zones. We note, however, that significant changes in the age of subducted lithosphere have occurred during the post-Eocene evolution of the Philippine Sea plate [20] (see also below).…”

Section: Lateral Variations In Shape Of Seismic Zones and Subducted Smentioning

confidence: 99%

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Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs

Hilst

Seno

1993

Earth and Planetary Science Letters

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239

122

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An increasing number of seismological studies indicate that slabs of subducted lithosphere penetrate the Earth's lower mantle below some island arcs but are deflected, or, rather, laid down, in the transition zone below others. Recent numerical simulations of mantle flow also advocate a hybrid form of mantle convection, with intermittent layering. We present a multi-disciplinary analysis of slab morphology and mantle dynamics in which we account explicitly for the history of subduction below specific island arcs in an attempt to understand what controls lateral variations in slab morphology and penetration depth. Central in our discussion are the Izu-Bonin and Mariana subduction zones. We argue that the differences in the tectonic evolution of these subduction zones--in particular the amount and rate of trench migration--can explain why the slab of subducted oceanic lithosphere seems to be (at least temporarily) stagnant in the Earth's transition zone below the Izu-Bonin arc but penetrates into the lower mantle below the Mariana arc. We briefly speculate on the applicability of our model of the temporal and spatial evolution of slab morphology to other subduction zones. Although further investigation is necessary, our tentative model shows the potential for interpreting seismic images of slab structure by accounting for the plate-tectonic history of the subduction zones involved. We therefore hope that the ideas outlined here will stimulate and direct new research initiatives.

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“…The present discussion is illustrated by the reconstruction by Seno and Maruyama [37] and Seno [20] which belongs to the latter group of models (Figs. 4 and 5).…”

Section: Plate-tectonic Reconstruction and The History Of Subductionmentioning

confidence: 83%

Section: Lateral Variations In Shape Of Seismic Zones and Subducted Smentioning

confidence: 99%

Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs

Hilst

Seno

1993

Earth and Planetary Science Letters

Self Cite

239

122

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“…In this context the Japan Sea opened as a right-lateral pull-apart compatible with block rotations about vertical axes deduced from paleomagnetic investigations. During this period of opening, the Philippine Sea plate was not in its present position but far southward (Seno, 1985a;, and a low mechanical coupling prevailed along the whole of the Japan arc except in the north, where transpressional dextral tectonics are observed (Kimura et al, 1983;Yamagishi and Watanabe, 1986;Jolivet and Miyashita, 1985; along the convergent North America-Eurasia plate boundary (Chapman and Solomon, 1976;Seno 1985b;Savostin et al, 1983;Jolivet, 1986), which departs from the stress-free assumption. The end of the northward motion of the Philippine Sea plate took place 12 to 15 Ma, when the Bonin arc first collided with Central Japan.…”

Section: Tectonic Implications Of Reconstructionsmentioning

confidence: 91%

“…This question has been discussed in several papers, and the authors proposed various possible reconstruc- tions through the Tertiary. Except for Otsuki (1985), the authors consider that the present triple junction was established through the Miocene and that it migrated northward along the eastern margin of Eurasia to its present position between 18 Ma (Seno, 1985b) to 15 Ma Taira et al, 1989;Charvet et al, 1990). This solution agrees better with the tectonic evolution of Japan.…”

Section: Nature Of the Crust And Tectonic Regimementioning

confidence: 99%

“…Slightly oblique convergence under the Kuril arc (eastern Hokkaido) produces a right-lateral displacement along the Kamishiyubetsu Tectonic Line in the volcanic front region (Kimura, 1986). The Philippine Sea plate subducts below Southwest Japan at about 4 cm/yr toward the northeast (Seno, 1977;Huchon, 1985;Ranken et al, 1984). Collision with the Bonin arc is active in Central Japan along the Kannawa Thrust.…”

Section: Reconstructions From 25 Ma To the Presentmentioning

confidence: 99%

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Neogene Kinematics in the Japan Sea Region and Volcanic Activity of the Northeast Japan Arc

Jolivet¹

1992

Proceedings of the Ocean Drilling Program

104

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Deep sea drilling in the Japan Sea during ODP Legs 127 and 128 brought new constraints to the timing and dynamics of backarc opening. The nature and age of the oceanic basement as well as the recovered lithology allow us to present new reconstructions from 25 Ma to the present. On-land deformation data as well as the offshore crustal structure and timing of volcanic events are the major constraints we use. The Japan Sea opened as a complex pull-apart basin in a dextral shear zone that extends more than 2000 km from Central Japan to Northern Sakhalin. Oceanic crust was emplaced in the northern part of the Japan Basin, and highly extended arc crust in the Tsushima and Yamato basins. Westward propagation of oceanic spreading was active in the early Miocene. Our reconstructions give a minimum estimate for the finite dextral displacement of about 400 km. We observe correlations between volcanic events and tectonic phases, and we explore the hypothesis that variations in the character of volcanism during the Neogene in Northeast Japan can be due to changes in the tectonic status of the arc crust other than deep-seated variations in the mantle: (1) starvation of the volcanic activity in the late Miocene (10-7 Ma) is correlated with a reorganization of the stress field over the whole region from a dextral transtensional field during the Japan Sea opening to the present compressional field, and this period of inversion did not allow the ascent of magma through the upper brittle crust; (2) correlation is also seen between the formation of the incipient subduction zone at 1.8 Ma along the eastern margin of the Japan Sea and the transition from acidic to andesitic volcanism in Northeast Japan. Compression between 7 and 2 Ma is associated with the formation of large calderas and eruptions of acidic products, after which the present-day andesitic volcanism began at 2 Ma. During the compressive period the magma could not easily make its way up to the surface and stayed longer in the deep crust, where it could differentiate until the formation of a caldera. After localization of strain along the eastern margin of the Japan Sea and inception of the new subduction zone, which partly released the stress across the arc, the ascent of magma became much easier and the character of surface eruptions thus changed to less explosive. We also discuss the migration of the volcanic front through time from 30 Ma to the present with respect to tectonic processes.

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Geological interpretation of volcanism and segmentation of the Mariana back‐arc spreading center between 12.7°N and 18.3°N

Anderson

Chadwick

Hannington

et al. 2017

Geochem Geophys Geosyst

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The relationships between tectonic processes, magmatism, and hydrothermal venting along ∼600 km of the slow‐spreading Mariana back‐arc between 12.7°N and 18.3°N reveal a number of similarities and differences compared to slow‐spreading mid‐ocean ridges. Analysis of the volcanic geomorphology and structure highlights the complexity of the back‐arc spreading center. Here, ridge segmentation is controlled by large‐scale basement structures that appear to predate back‐arc rifting. These structures also control the orientation of the chains of cross‐arc volcanoes that characterize this region. Segment‐scale faulting is oriented perpendicular to the spreading direction, allowing precise spreading directions to be determined. Four morphologically distinct segment types are identified: dominantly magmatic segments (Type I); magmatic segments currently undergoing tectonic extension (Type II); dominantly tectonic segments (Type III); and tectonic segments currently undergoing magmatic extension (Type IV). Variations in axial morphology (including eruption styles, neovolcanic eruption volumes, and faulting) reflect magma supply, which is locally enhanced by cross‐arc volcanism associated with N‐S compression along the 16.5°N and 17.0°N segments. In contrast, cross‐arc seismicity is associated with N‐S extension and increased faulting along the 14.5°N segment, with structures that are interpreted to be oceanic core complexes—the first with high‐resolution bathymetry described in an active back‐arc basin. Hydrothermal venting associated with recent magmatism has been discovered along all segment types.

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Age of Subducting Lithosphere and Back-Arc Basin Formation in the Western Pacific Since the Middle Tertiary

Cited by 18 publications

References 21 publications

Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs

Effects of relative plate motion on the deep structure and penetration depth of slabs below the Izu-Bonin and Mariana island arcs

Neogene Kinematics in the Japan Sea Region and Volcanic Activity of the Northeast Japan Arc

Geological interpretation of volcanism and segmentation of the Mariana back‐arc spreading center between 12.7°N and 18.3°N

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