Cenozoic stratigraphy and sedimentation history of the northern Philippine Sea based on multichannel seismic reflection data

Higuchi, Yu; Yanagimoto, Yutaka; Hoshi, Kazuyoshi; Unou, Sadao; Akiba, Fumio; Tonoike, Kunishige; Koda, Keita

doi:10.1111/j.1440-1738.2007.00588.x

Cited by 33 publications

(38 citation statements)

References 22 publications

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“…The LSB sequence is correlated with the middle Miocene to lower Pliocene hemipelagic mudstone sampled at the ODP drill sites (Moore et al. 2001a), and the seismic character is similar to Facies A of Higuchi et al. (2007).…”

Section: Seismic Stratigraphymentioning

confidence: 81%

“…2001a). The USB sequence, characterized by low amplitude seismic reflections similar to Facies A of Higuchi et al. (2007) in the upper part of the sequence and few coherent reflections in the lower part, is correlated with a hemipelagic mudstone and an abundant ash and tuff unit that is Quaternary to Pliocene in age at ODP Site 1173.…”

Section: Seismic Stratigraphymentioning

confidence: 95%

“…2001a). A regional study of seismic reflection lines across the entire northern Philippine Sea led to a general definition of Cenozoic sediment stratigraphy and lithofacies classification (Higuchi et al. 2007).…”

Section: Geological Settingmentioning

confidence: 99%

“…2007). Our study, which uses newer seismic reflection data, is concentrated on the northernmost part of the Philippine Sea, which is not covered by data of Higuchi et al. (2007).…”

Section: Geological Settingmentioning

confidence: 99%

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Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

et al. 2008

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We documented regional and local variations in basement relief, sediment thickness, and sediment type in the Shikoku Basin, northern Philippine Sea Plate, which is subducting at the Nankai Trough. Seismic reflection data, tied with ocean drilling program drill cores, reveal that variations in the incoming sediment sequences are correlated with basement topography. We mapped the three-dimensional seismic facies distribution and measured representative seismic sequences and units. Trench-parallel seismic profiles show three regional provinces in the Shikoku Basin that are distinguished by the magnitude of basement relief and sediment thickness: Western (<200-400 m basement relief, >600 m sediment thickness), Central (>1500 m relief,~2000 m sediments), and Eastern (<600 m relief,~1200 m sediments) provinces. The total thickness of sediment in basement lows is as much as six times greater than that over basement highs. Turbidite sedimentation in the Shikoku Basin reflects basement control on deposition, leading to the local presence or absence of turbidite units deposited during the middle Oligocene to the middle Miocene. During the first phase of sedimentation, most basement lows were filled with turbidites, resulting in smooth seafloor morphology that does not reflect basement relief. A second phase of turbidite deposition in the Eastern Province was accompanied by significant amounts of hemipelagic sediments interbedded with turbidite layers compared to the other provinces because of its close proximity to the Izu-Bonin Island Arc. Both regional and local variations in basement topography and sediment thickness/type have caused lateral heterogeneities on the underthrusting plate that will, in turn, influence lateral fluid flow along the Nankai accretionary prism.

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Section: Seismic Stratigraphymentioning

confidence: 81%

Section: Seismic Stratigraphymentioning

confidence: 95%

Section: Geological Settingmentioning

confidence: 99%

“…2007). Our study, which uses newer seismic reflection data, is concentrated on the northernmost part of the Philippine Sea, which is not covered by data of Higuchi et al. (2007).…”

Section: Geological Settingmentioning

confidence: 99%

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Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

et al. 2008

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“…On its west side, Kyushu‐Palau Ridge (the remnant Eocene‐Oligocene arc) separates the Shikoku Basin from the West Philippine Basin (Figure ). Seismic reflection data from the Shikoku Basin show that the total thickness of sediment decreases toward the south; sediments in the southern (distal) part are thin and discontinuously distributed in depressions developed on the irregular basement (Higuchi et al, ). Closer to the Nankai subduction front, heterogeneities increase in both total‐sediment thickness and acoustic facies, with thicker and more sand‐rich (inferred turbidite) deposits concentrated above basement lows (Ike et al, ).…”

Section: Geologic Backgroundmentioning

confidence: 99%

The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

Underwood

2018

Island Arc

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One of the more prominent architectural elements of the Nankai subduction margin, offshore southwest Japan, is an out‐of‐sequence thrust fault (megasplay) that separates the inner accretionary prism from the outer prism. The inner prism (hanging wall of the megasplay) is dominated by mudstone, which is enigmatic when the sedimentary facies is compared to coeval deposits in the Shikoku Basin (i.e. inputs from the subducting Philippine Sea plate) and to coarser‐grained turbidite sequences from the Quaternary trench wedge. Clay mineral assemblages amplify the mismatches of sedimentary facies. Mudstones from the inner prism are uniformly depleted in smectite, with average bulk values of 23–24 wt%, whereas the Shikoku Basin deposits show progressive decreases in proportions of smectite over time, from averages of 46–48 wt% at 10 Ma to 17–21 wt% at 1 Ma. Plate‐boundary reconstructions for the Philippine Sea region provide one solution to the conundrum. Between 15 Ma and 10 Ma, the Pacific plate subducted near the NanTroSEIZE transect, and a trench‐trench‐trench triple junction migrated to the northeast. Accretion during that period involved sediments that had been deposited on the Pacific plate. Motion of the Philippine Sea plate changed from 10 Ma to 6 Ma, resulting in sinistral slip along the proto‐Nankai Trough. Sediments accreted during that period probably had been deposited near the triple junction, with a hybrid detrital provenance. Renewed subduction of the Philippine Sea plate at 6 Ma led to reorganization of watersheds near the Izu–Honshu collision zone and gradual incision of large submarine canyons on both sides of the colliding Izu arc. Accreted Pliocene mudstones share more of an affinity to the triple junction paleoenvironment than they do to Shikoku Basin. These differences between subducting Shikoku Basin strata and accreted Pacific plate sediments have important implications for interpretations of frictional properties, structural architecture, and diagenetic fluid production.

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A synthesis of heat flow determinations and thermal modeling along the Nankai Trough, Japan

et al. 2013

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[1] We review marine heat flow data along the Nankai Trough and show that observations >30 km seaward of the deformation front are 20% below conductive predictions (129-94 mW m À2 ) but consistent with the global heat flow average for oceanic crust of the same age (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28). Heat flow values ≤30 km seaward of the deformation front are generally 20% higher than conductive predictions. This heat flow pattern is consistent with the advection of heat by fluid flow in the subducting oceanic crust and explains both the high heat flux in the vicinity of the trench, >200 and >140 mW m À2, and steep landward declines to values of approximately 60 mW m À2 over distances of 65 and 50 km along the Muroto and Kumano transects, respectively. Along the Ashizuri transect, the lack of heat flow data precludes a definitive interpretation. We conclude that fluid flow in the subducting oceanic crust leads to temperatures that are generally 25 C higher near the toe of the margin wedge and 50-100 C lower near the downdip limit of the seismogenic zone than estimated by purely conductive models.Citation: Harris, R., M. Yamano, M. Kinoshita, G. Spinelli, H. Hamamoto, and J. Ashi (2013), A synthesis of heat flow determinations and thermal modeling along the Nankai Trough, Japan,

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Cenozoic stratigraphy and sedimentation history of the northern Philippine Sea based on multichannel seismic reflection data

Abstract: To clarify the regional distribution and characteristics of the sedimentary depos-

Cited by 33 publications

References 22 publications

Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

Variations in sediment thickness and type along the northern Philippine Sea Plate at the Nankai Trough

The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

A synthesis of heat flow determinations and thermal modeling along the Nankai Trough, Japan

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