Izu-Bonin
Age of Izu-Bonin-Mariana arc basement
... the Izu–Bonin–Mariana (IBM) arc system in the Western Pacific is critical for understanding the process and cause of subduction initiation along the current convergent margin between the Pacific and ...
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Segmentation of the Izu-Bonin and Mariana slabs based on the analysis of the Benioff seismicity distribution and regional tomography results
... The main purpose of this paper is to compute a new 3-D seis- mic model of the mantle beneath the IBM system and to use it to reconstruct the plate interactions and the subduction de- velopment in this area. This ...
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Origin of depleted basalts during subduction initiation and early development of the Izu-Bonin-Mariana island arc: Evidence from IODP expedition 351 site U1438, Amami-Sankaku basin
... Basaltic basement drilled at Site U1438 in the Amami Sankaku basin formed concurrently with initiation of sub- duction along the Izu-Bonin-Mariana arc, and is not preex- isting oceanic basement on which the ...
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Philippine Sea Plate inception, evolution, and consumption with special emphasis on the early stages of Izu-Bonin-Mariana subduction
... required compressional tectonic forces to initiate them (Hall et al. 2003; Lallemand et al. 2005). Thirdly, trans- pression along a former transform boundary between two oceanic plates may allow the younger plate to sub- ...
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S wave attenuation structure beneath the northern Izu–Bonin arc
... In this study, we examined the S-wave attenuation tomography of the northern Izu–Bonin arc to elucidate the seismic structure of the crust and uppermost mantle. Seismic wave attenuation in this arc would be ...
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A record of spontaneous subduction initiation in the Izu–Bonin–Mariana arc
... , seem relevant to initiation of one of the largest intra-oceanic subduction zones in the western Pacific, namely the Izu-Bonin-Mariana (IBM) system. Induced subduction initiation leading to self-sustaining ...
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Mass budget of the magma flow in the 2000 volcano seismic activity at Izu islands, Japan
... Kozushima is one of the volcano islands in the Izu-Bonin arc at the eastern edge of the Philippine Sea Plate which is subducted by the Pacific Plate (Fig. 1). Historical records tell that the latest ...
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Izu detachment hypothesis: A proposal of a unified cause for the Miyake Kozu event and the Tokai slow event
... the Izu islands starting on June 26, 2000. The Izu islands, consisting of Miyakejima, Ni- ijima, Kozushima, and smaller islands, are volcanic islands in the Izu-Bonin backarc formed by the ...
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Seismotectonic modeling of the repeating M 7 class disastrous Odawara earthquake in the Izu collision zone, central Japan
... the Izu collision zone, or the South Fossa Magna (SFM; stippled ...Iz, Izu Peninsula; Kt, Kanto district; Tk, Tokai district; IIA, Izu Inner Arc; IOA, Izu Outer Arc; SB, Shikoku ...the ...
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Polybaric crystallization differentiation of H2O saturated island arc low K tholeiite magmas: a case study of the Izu Oshima volcano in the Izu arc
... Among the island arc magmas, low-K series rocks, known as island arc low-K tholeiite magmas, are infre- quently found. This rock series occurs only in frontal arc volcanoes associated with the subduction of old and cold ...
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Isolated intermediate depth seismicity north of the Izu peninsula, Japan: implications for subduction of the Philippine Sea Plate
... the Izu volcanic arc formed before 40 Ma, while that located west of the arc formed as a back-arc basin from 27 to 15 Ma ...The Izu volcanic ridge on the PHS Plate, which formed in an intraoceanic setting, ...
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Sequence of deep focus earthquakes beneath the Bonin Islands identified by the NIED nationwide dense seismic networks Hi net and F net
... seismograph network operated by NIED) (Okada et al. 2004). Event 2 is not listed in the JMA or F-net MT cata- logs. Based on their MS envelopes (Fig. 2b), the mag- nitude of Event 2 should be larger than that of Event 3, ...
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Seismotectonics in the Tanzawa Mountains area in the Izu Honshu collision zone of central Japan, as revealed by precisely determined hypocenters and focal mechanisms
... the Izu-Honshu collision zone, where the Izu Bonin arc on the Philippine Sea (PHS) plate has been colliding into Honshu island on the Eurasian ...the Izu-Bonin arc that have accreted ...
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Crustal structure in the northwestern part of the Izu collision zone in central Japan
... The Izu-Bonin arc (IBA) has been colliding with the Honshu arc since the middle Miocene, which together form the active Izu arc-arc collision zone (ICZ) in central ...
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Structural variation of the Bonin ridge revealed by modeling of seismic and gravity data
... the Bonin ridge were seismologically identical to those of typical oceanic ...the Izu- Bonin intra-oceanic arc was formed by forearc spreading during the initial stage of subduction (Kodaira et ...
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Diffusion of crustal deformation from disturbances arising at plate boundaries—a case of the detachment beneath the Izu Peninsula, central Honshu, Japan—
... Fig. 2. Tectonic elements in central Honshu–Izu islands region (modified from Seno, 2005). The Philippine Sea plate is subducting along the Sagami Trough and the Nankai Trough with the velocities of 27 mm/yr and 40 ...
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Slow slip in the focal region of the anticipated Tokai earthquake following the seismo volcanic event in the northern Izu Islands in 2000
... Transient crustal deformation occurred in the regions of Kanto and Tokai during the seismo-volcanic event in the northern Izu Islands in 2000. In our investigation of the observed deformation, we constructed an ...
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Crustal deformation associated with crustal activities in the northern Izu islands area during the summer, 2000
... placement is unavoidable. The notation “Baseline: A–B” means the coordinates of station A are subtracted from those of station B. The length components of baselines 93059– 93060, 93059–960600 and 93060–960600 increased ...
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Gravity and magnetic constraints on the crustal structure and evolution of the Horeki seamount in the Izu Ogasawara (Bonin) arc
... Data on the crustal structure, bulk composition, and eruption ages of an arc seamount were obtained in an investigation aimed at studying the spatial and temporal variations in the magma composition of an intra- oceanic ...
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A method for simultaneous velocity and density inversion and its application to exploration of subsurface structure beneath Izu Oshima volcano, Japan
... Izu-Oshima is a volcanic island located at about 120 km SSW of Tokyo (Fig. 2(a)). It is one of the most active volca- noes in Japan, and throughout its history most eruptive ma- terials have been basaltic. Figure ...
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