Origin and evolution of the West Philippine Basin: A new interpretation

Hilde, Thomas W.C.; Lee, Chao-Shing

doi:10.1016/0040-1951(84)90009-x

Cited by 289 publications

(266 citation statements)

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“…We present a new boron data for the basalts and basaltic andesites from Hisatsu volcanic province and for Kirishima volcano to investigate the influence of subduction of the Philippine Sea plate on the island-arc-type magma genesis in southern Kyushu, Japan. Okino et al (1994), Shibata et al (1977), Hilde and Lee (1984) and Hickey-Vergas (2006 (Nagao et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Boron systematics of Hisatsu and Kirishima basaltic rocks from southern Kyushu, Japan

et al. 2010

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To evaluate the effect of slab-derived fluids from subducted Philippine Sea plate on mantle composition beneath southern Kyushu, we determined the boron (B) contents in basaltic rocks from Hisatsu volcanic province and Kirishima volcano, which erupted since 7.6 Ma. Since B is distinctively concentrated into slab-derived fluids, we have attempted to estimate the influence of subduction-related inputs on the composition of the sub-arc mantle based on the B systematics of the basaltic rocks.Old ( These observations indicate that B-rich fluids from Philippine Sea plate were added to the mantle beneath Kirishima volcano between 0.4 and 0.3 Ma. Therefore the modern fluid input from the subducted slab to the subarc mantle may be limited beneath the volcanic front in this area.Keywords: boron, Philippine Sea plate, southern Kyushu, subduction zone, basalt Chaussidon and Marty, 1995;Sun and McDonough, 1989) as they have had no interaction with subducted slabderived fluid and/or melt.In order to identify the involvement of the subducted slab-derived hydrous fluid in the mantle wedge, we employ fluid-mobile/immobile element ratios (B/Sm, B/Zr, B/Nb and Ba/Zr). Previous works (Leeman and Sisson, 1996;Ishikawa and Nakamura, 1994;Ishikawa and Tera, 1997;Ishikawa et al., 2001;Tonarini et al., 2004;Sano et al., 2001) indicate that B/Sm, B/Zr and B/Nb ratios are sensitive indicators of the involvement of the subducted slab-derived fluid because of the following: (1) Since B and Nb have similar solid/melt distribution coefficients under upper mantle and crustal conditions, B/Nb ratios are not significantly controlled by partial melting and fractional crystallization processes; (2) B and the preceding three elements have entirely different chemical behaviors in fluid-related processes. The mobility of B in fluid is distinctly higher than those of Sm, Zr and Nb; (3) The enrichment of B/Nb does not reflect the crustal assimilation process because the B/Nb ratio in the crustal rocks is negligibly low (continental crust: 0.4-0.7;Wedepohl, 1995).

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Section: Introductionmentioning

confidence: 99%

“…The Philippine Sea plate is divided into two different segments by the NW-SE trending Kyushu-Palau ridge. The northern segment (Shikoku basin) is relatively young and hot (15-26 Ma;Okino et al, 1994), whereas the southern segment is old and cold (37-115 Ma; Shibata et al, 1977;Hilde and Lee, 1984;Hickey-Vargas, 2006) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Boron systematics of Hisatsu and Kirishima basaltic rocks from southern Kyushu, Japan

et al. 2010

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“…The Philippine Sea Plate (PSP), which is subducting beneath the Eurasian Plate directly beneath Kyushu Island, is classified into three portions: a young portion located in the Shikoku Basin (15-27 Ma) [Okino et al, 1999], an old portion (45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55) [Hilde and Lee, 1984], and a portion on the Kyushu-Palau Ridge (KPR) (Figure 1). Many active Quaternary volcanoes (some with calderas), which are considered to be the result of subduction-related volcanism, occur along a volcanic front (VF), as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…Zhao et al [2000] reported that two distinct low-velocity anomalies are present in the mantle wedge beneath the active Okino et al [1999] and Hilde and Lee [1984]. Red stars represent the Kanoya and Kakioka Magnetic Observatories (JMA).…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional electromagnetic imaging of upwelling fluids in the Kyushu subduction zone, Japan

et al. 2015

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A three-dimensional (3-D) lithospheric-scale electrical resistivity model, developed using network-magnetotelluric (network-MT) data, contains structures associated with arc magmatism beneath Kyushu Island in the Southwest Japan arc. Kyushu Island, where the Philippine Sea Plate (PSP) subducts beneath the Eurasian plate, can be divided into northern and southern volcanic regions separated by a nonvolcanic region. Many active Quaternary volcanoes occur along the volcanic front (VF) associated with the PSP in the two volcanic regions. Our 3-D electrical resistivity model shows three different shapes of upwelling fluid-like conductive anomalies, indicative of either slab-derived aqueous fluid and/or partial melt beneath the volcanic and nonvolcanic regions. A conductive anomaly in the northern volcanic region, located at some distance from the subducting PSP, extends from the surface to depths of <100 km, whereas another conductive anomaly in the southern volcanic region, located along the subducting PSP at >70 km depth, extends from the surface to depths of >100 km. In the nonvolcanic region, the upper region of a relatively conductive anomaly extends upward to a depth of~50 km along the subducting plate. The degrees of magmatism and the relative contribution of slab-derived fluids to the magmatism vary spatially in the one nonvolcanic and two volcanic regions.

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“…The Gagua Ridge formation may has resulted from fracture zones (Karig and Wageman 1975), extinct spreading ridge (Bowin et al 1978), uplift of oceanic crust (Mrozowski et al 1982) or an old subduction zone (Evans and Lewis 1984). The Gagua Ridge was most likely formed due to a change of spreading direction and Philippine Sea Plate reorganization at about 45 Ma (Hilde and Lee 1984;Hall et al 1995). This hypothesis posits that the Gagua Ridge may have formed due to strike-slip deformation of the West Philippine Basin from the geophysical data (Deschamps and Lallemand 2002).…”

Section: Introductionmentioning

confidence: 99%

Crustal Velocity Structures Imaged from Four-Component OBS Data Across the Southern Gagua Ridge in the Western Philippine Sea

Deng¹,

Wang²,

Chen³

et al. 2014

Terr. Atmos. Ocean. Sci.

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Crustal structures near a linear oceanic ridge, the Gagua Ridge, between the West Philippine Basin and the Huatung Basin in the western Philippine Sea were imaged based on head-wave, refracted and reflected P-wave arrivals recorded from 24 oceanbottom seismometers (OBS). Velocity anomaly zones, one below the Gagua Ridge summit and the others beneath two toes of the Gagua Ridge, imaged by large lateral variations in P-wave velocity of 5.5 -6.4 km s -1 and low velocity of 4 -5 km s -1 in the upper crust may have been generated when the Gagua Ridge was formed. East of the ridge, velocity anomaly zones, constrained by large lateral variations in P-wave velocity (4.8 -6.4 km s -1 ), relatively low velocity (4 -5 km s -1 ) and laterally high anomaly of Poisson's ratio (0.02 -0.04) in the upper crust and abrupt crustal thickening (6 -8.5 km) northward were obtained. West of the ridge, the velocity anomaly zones indicated by large lateral variations in P-wave velocity (5.2 -6.2 km s -1 ) and laterally high anomaly of Poisson's ratio (0.02 -0.04) in the upper crust and thick crust (thickening southward from 9 -12 km) were found below the Huatung Basin and the Western Trough of the Gagua Ridge. Abrupt crustal thickening northward east of the ridge may be related to northwestward convergence of the Philippine Sea Plate. These velocity anomaly zones in the upper crust at both sides of the ridge might result from deformed, fractured or faulted zones. These zones support E -W compression, N -S shearing (or transpression) and uplifting that may have also created the Gagua Ridge and crustal thickening west of the ridge.

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Origin and evolution of the West Philippine Basin: A new interpretation

Cited by 289 publications

References 24 publications

Boron systematics of Hisatsu and Kirishima basaltic rocks from southern Kyushu, Japan

Boron systematics of Hisatsu and Kirishima basaltic rocks from southern Kyushu, Japan

Three‐dimensional electromagnetic imaging of upwelling fluids in the Kyushu subduction zone, Japan

Crustal Velocity Structures Imaged from Four-Component OBS Data Across the Southern Gagua Ridge in the Western Philippine Sea

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