Collision of the IZU arc with Honshu and the effects of oblique subduction in the Miura-Boso peninsulas

Ogawa, Yujiro; Horiuchi, Kazutoshi; Taniguchi, Haruhito; Naka, Jiro

doi:10.1016/0040-1951(85)90046-0

Cited by 55 publications

(18 citation statements)

References 52 publications

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“…The turbidite sands at Site 808 contain a wide variety of neovolcanic and paleovolcanic fragments, with lathwork, microlitic, felsitic and vitric textures, in addition to sedimentaryrock fragments consisting primarily of shale and mudstone, fresh euhedral plagioclase, both monocrystalline and polycrystalline quartz (chert) and minor amounts of low-grade metamorphic-rock fragments. This detritus matches the subaerial geology of the Izu-Honshu collision zone (Figure 1), as summarized by Ogawa et al (1985), Ogawa and Taniguchi (1988), Toriumi and Arai (1989) and Soh et al (1991). Lithologies are diverse and include the following fundamental units: accreted sedimentary and volcanic rocks of the Shimanto Belt; ophiolitic rocks of early Tertiary age; Neogene sedimentary rocks composed of fine-grained tuffaceous and terrigenous debris; quartz diorite bodies that intruded the Miocene volcaniclastic units; and Quaternary volcanic centers (including Mt.…”

Section: Sediment Provenancesupporting

confidence: 78%

Clay-Mineral Provenance, Sediment Dispersal Patterns, and Mudrock Diagenesis in the Nankai Accretionary Prism, Southwest Japan

Underwood

Pickering

1996

Clays and clay miner.

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Abstract--Offscraped strata within the toe of Nankai accretionary prism display an overall facies pattern of thickening and coarsening upward. Detrital clay minerals within the Quaternary trench-wedge facies are dominated by illite; chlorite is the second-most abundant clay mineral, followed by smectite. Relative mineral percentages change only modestly with depth. The hemipelagic clay-mineral population is virtually identical to clays washed from turbidite matrix, and different size fractions (<2 ixm and 2-6 ixm) show nominal amounts of mineral partitioning. Smectite content increases beneath the trench-wedge deposits, where the upper subunit of the Shikoku Basin stratigraphy (late Pliocene and early Pleistocene) includes abundance of volcanic ash. Syneruptive, subaerial chemical weathering of volcanic source rocks, together with in situ alteration of disseminated glass shards, caused the increase in smectite. Smectite begins a monotonic transformation to illite/smectite (US) mixed-layer clay at --555 mbsf and an estimated temperature of -65 ~ Ordered (R = 1) I/S interlayering first appears at --1220 mbsf (<2 ~m size fraction) and --1100 mbsf (<0.2 ~m size fraction). The illitization gradient coincides with a reduction in pore-water chlorinity, but depth-related changes in bulk mudstone geochemistry (K20, Rb) are subtle. The absolute abundances of discrete smectite and US appear to be insufficient to account for the magnitude of pore-water dilution via in situ dehydration reactions. Instead, pore water probably was transported to Site 808, either from sources located deeper in the accretionary prism, where bulk mudstone porosities are lower, or from strike-parallel sources where mudstones originally deposited in the Shikoku Basin might contain higher percentages of smectite.

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Section: Sediment Provenancesupporting

confidence: 78%

Clay-Mineral Provenance, Sediment Dispersal Patterns, and Mudrock Diagenesis in the Nankai Accretionary Prism, Southwest Japan

Underwood

Pickering

1996

Clays and clay miner.

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“…When viewed within the conceptual framework of tectonic-provenance fields (e.g., Dickinson and Suczek, 1979;Dickinson, 1985;Valloni, 1985), most of the data from Nankai Trough plot along a mixing line between an undissected magmatic-arc component and a recycled accretionaryprism component (Marsaglia et al, in press). This type of tectonic provenance is consistent with the rock types exposed in the Izu-Honshu collision zone (Ogawa et al, 1985;Toriumi and Arai, 1989). Taira and Niitsuma (1986); composite of Sites 582 and 583, Marsaglia et al (in press); Site 298, Marsaglia et al (in press); and Site 297 (Pliocene Shikoku Basin), Marsaglia et al (in press).…”

Section: Sand Petrographysupporting

confidence: 78%

“…14) has been summarized by Ogawa et al (1985), Ogawa and Taniguchi (1988), Toriumi and Arai (1989), and Soh et al (1991). The lithologies are diverse and include the following fundamental units: accreted sedimentary and volcanic rocks of the Shimanto Belt; ophiolitic rocks of early Tertiary age; Neogene sedimentary rocks composed of finegrained tuffaceous and terrigenous debris; quartz diorite bodies that intrude the Miocene volcaniclastic units; and Quaternary volcanic centers (including Mt.…”

Section: Discussionmentioning

confidence: 99%

“…Based on comparisons with data from modern fluvial and nearshore sands (Taira and Niitsuma, 1986), we would agree that the detritus at Site 808 probably was derived from a source region that includes the Fuji River drainage basin and perhaps the Tenryu River drainage. This lithologic mixture in the source terrane was created by simultaneous volcanism and uplift of previously accreted materials during the collision between the Izu-Bonin Arc and the Honshu Arc (Ogawa et al, 1985;Toriumi and Arai, 1989).…”

Section: Sand Petrographymentioning

confidence: 99%

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Provenance and Dispersal Patterns of Sediments in the Turbidite Wedge of Nankai Trough

Underwood¹,

Orr²,

Pickering³

et al. 1993

Proceedings of the Ocean Drilling Program

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Drill core recovered at Ocean Drilling Program Site 808 (Leg 131) proves that the wedge of trench sediment within the central region of the Nankai Trough comprises approximately 600 m of hemipelagic mud, sandy turbidites, and silty turbidites. The stratigraphic succession thickens and coarsens upward, with hemipelagic muds and volcanic-ash layers of the Shikoku Basin overlain by silty and sandy trench-wedge deposits. Past investigations of clay mineralogy and sand petrography within this region have led to the hypothesis that most of the detritus in the Nankai Trough was derived from the Izu-Honshu collision zone and transported southwestward via axial turbidity currents. Shipboard analyses of paleocurrent indicators, on the other hand, show that most of the ripple cross-laminae within silty turbidites of the outer marginal trench-wedge facies are inclined to the north and northwest; thus, many of the turbidity currents reflected off the seaward slope of the trench rather than moving straight down the trench axis. Shore-based analyses of detrital clay minerals demonstrate that the hemipelagic muds and matrix materials within sandy and silty turbidites are all enriched in illite; chlorite is the second-most abundant clay mineral, followed by smectite. In general, the relative mineral percentages change relatively little as a function of depth, and the hemipelagic clay-mineral population is virtually identical to the turbidite-matrix population.Comparisons between different size fractions (<2 µm and 2-6 µm) show modest amounts of mineral partitioning, with chlorite content increasing in the coarser fraction and smectite increasing in the finer fraction. Values of illite crystallinity index are consistent with conditions of advanced anchimetamoΦhism and epimetamoΦhism within the source region. Of the three mica poly types detected, the 2Mj variety dominates over the IM and IMd polytypes; these data are consistent with values of illite crystallinity. Measurements of mica b o lattice spacing show that the detrital illite particles were eroded from a zone of intermediate-pressure metamoΦhism. Collectively, these data provide an excellent match with the lithologic and metamoΦhic character of the Izu-Honshu collision zone. Data from Leg 131, therefore, confirm the earlier inteΦ r etations of detrital provenance. The regional pattern of sediment dispersal is dominated by a combination of southwest-directed axial turbidity currents, radial expansion of the axial flows, oblique movement of suspended clouds onto and beyond the seaward slope of the Nankai Trough, and flow reflection back toward the trench axis.

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“…Similar lithologies to those drilled during Expedition 352 are exposed in the Boso Peninsula (Ogawa et al, 1985). The Boso Peninsula was established by around 15 Ma (Figure 19 (b)).…”

Section: Constraints From the Geology Of Honshumentioning

confidence: 67%

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

Robertson

Kutterolf

Avery

et al. 2017

International Geology Review

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New biostratigraphical, geochemical, and magnetic evidence is synthesized with IODP Expedition 352 shipboard results to understand the sedimentary and tectono-magmatic development of the Izu-Bonin outer forearc region. The oceanic basement of the Izu-Bonin forearc was created by supra-subduction zone seafloor spreading during early Eocene (c. 50-51 Ma). Seafloor spreading created an irregular seafloor topography on which talus locally accumulated. Oxide-rich sediments accumulated above the igneous basement by mixing of hydrothermal and pelagic sediment. Basaltic volcanism was followed by a hiatus of up to 15 million years as a result of topographic isolation or sediment bypassing. Variably tuffaceous deep-sea sediments were deposited during Oligocene to early Miocene and from mid-Miocene to Pleistocene. The sediments ponded into extensional fault-controlled basins, whereas condensed sediments accumulated on a local basement high. Oligocene nannofossil ooze accumulated together with felsic tuff that was mainly derived from the nearby Izu-Bonin arc. Accumulation of radiolarian-bearing mud, silty clay, and hydrogenous metal oxides beneath the carbonate compensation depth (CCD) characterized the early Miocene, followed by middle Miocene-Pleistocene increased carbonate preservation, deepened CCD and tephra input from both the oceanic Izu-Bonin arc and the continental margin Honshu arc. The Izu-Bonin forearc basement formed in a near-equatorial setting, with late Mesozoic arc remnants to the west. Subduction-initiation magmatism is likely to have taken place near a pre-existing continent-oceanic crust boundary. The Izu-Bonin arc migrated northward and clockwise to collide with Honshu by early Miocene, strongly influencing regional sedimentation. ARTICLE HISTORY

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Collision of the IZU arc with Honshu and the effects of oblique subduction in the Miura-Boso peninsulas

Cited by 55 publications

References 52 publications

Clay-Mineral Provenance, Sediment Dispersal Patterns, and Mudrock Diagenesis in the Nankai Accretionary Prism, Southwest Japan

Clay-Mineral Provenance, Sediment Dispersal Patterns, and Mudrock Diagenesis in the Nankai Accretionary Prism, Southwest Japan

Provenance and Dispersal Patterns of Sediments in the Turbidite Wedge of Nankai Trough

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

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