The Ancient Continental Margin of Japan

Kimura, Toshio

doi:10.1007/978-3-662-01141-6_61

Cited by 17 publications

(3 citation statements)

References 18 publications

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“…The latter assemblage is similar to that found in Neogene sediments of northwestern Hokkaido (Ujiie et al, 1977). Most of the sediment in the Japan fore-arc region was derived, not surprisingly, from the active volcanic arc complex (existing both on Honshu and Hokkaido), with lesser contributions from exposed older nonvolcanic sedimentary and metamorphic terrain, such as those of the Kitakami Massif on northern Honshu (see Kimura, 1974;Honza et al, 1977) or the Hidaka Belt on Hokkaido (e.g., Hashimoto, 1977).…”

Section: Composition Of Clastic Materialsmentioning

confidence: 99%

“…Although the early Neogene history primarily involved rapid subsidence of the once subaerially exposed outer fore-arc region, this trend was reversed in the late Pliocene-Pleistocene on the upper trench inner slope and deep sea terrace and possibly accelerated on the lower trench inner slope. The beginning of subsidence of the Paleogene outer arc high and acidic volcanism in the fore-arc region may have been related to the termination of orogenic events in the HidakaKamuikotan orogenic belt on Hokkaido and its offshore extensions (e.g., Hashimoto, 1977; see also Moore and Fujioka, this volume) and the concomitant opening of the Japan Sea during the late Oligocene-early Miocene (see review by Kimura, 1974;Matsuda et al, 1967;Honza et al, 1977). Regional subsidence and major sediment accumulation in the Tohoku Arc region on northern Honshu began during the early Miocene and culminated in the middle Miocene in a manner similar to that of the deep sea terrace, as exemplified by Sites 438 and 439.…”

Section: Recognizing Sedimentary Environments In Fore-arc Regionsmentioning

confidence: 99%

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Sedimentary Evolution of the Japan Fore-Arc Region off Northern Honshu, Legs 56 and 57, Deep Sea Drilling Project

Arthur¹,

Huen²,

Adelseck³

1980

Initial Reports of the Deep Sea Drilling Project

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The evolution of Neogene and Quaternary sedimentation in the fore-arc region off northern Honshu is evaluated using multichannel and single-channel seismic records in conjunction with the drill holes of the Japan Trench Transect (DSDP/IPOD Legs 56-57). The outer forearc region, which consisted of older sedimentary rocks and some calc-alkaline volcanic rocks, was subaerially exposed and eroded during the Paleogene and part of the Neogene. The deep sea terrace (fore-arc basin) region subsided below sea level in the early Miocene; most rapid subsidence occurred during the early to middle Miocene. Submergence progressed seaward so that the last vestige of the Oyashio landmass, which is now under the upper trench slope, was below sea level in the latest Miocene. Sediment sources to the outer fore-arc basin changed progressively from lithic, predominantly nonvolcanic material derived from the uplifted landmass during the late Paleogene-early Neogene to volcanic, arc-derived sediment rich in volcanic glass, Plagioclase, and volcanic lithic fragments. The volcaniclastic sediment was probably derived both from Honshu to the west and Hokkaido to the northwest.In response to subsidence the sedimentary depocenters in the fore-arc basin migrated generally seaward through time; the greatest relative seaward migration occurred between the late Miocene and Pliocene. Thick sediment sequences accumulated in slope basins on the trench inner slope. Sediment from the arc moved seaward to spill over the slope via large channels.An abrupt change in morphology and patterns of sedimentation apparently took place in the late Pliocene, coincident with a peak in explosive volcanism recorded in the form of ash layers and increased glass contents in sediment. The deep sea terrace was uplifted several hundreds of meters and a major channel crossing the fore-arc region was tilted landward and filled. At about the same time the midslope terrace basin was created and began rapidly accumulating sediment. The older basins, lower on the trench inner slope, were destroyed, possibly by steep seaward tilting, or filled. Large slump masses were sloughed-off downslope to the trench. Little sediment now accumulates on the trench inner slope in the vicinity of the sites, and older strata crop out on the slope. The locus of deposition has shifted northward off Hokkaido where a large channel feeds sediment to the slope. Large slump masses now fill the trench and are being accreted, creating a "toe" to the slope in this region.

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Section: Composition Of Clastic Materialsmentioning

confidence: 99%

Section: Recognizing Sedimentary Environments In Fore-arc Regionsmentioning

confidence: 99%

Sedimentary Evolution of the Japan Fore-Arc Region off Northern Honshu, Legs 56 and 57, Deep Sea Drilling Project

Arthur¹,

Huen²,

Adelseck³

1980

Initial Reports of the Deep Sea Drilling Project

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“…These strata locally overlap across the near edges of the Ryoke and Shimanto terranes. It remains unclear whether the Shi manto complex is a true subduction complex composed mainly of suc cessive trench floor and transported ocean floor sections accreted tec hnically to the island arc; it may instead have accumulated depositionally, and thus more or less in place, on top of a subduction complex that remains hidden from view [e.g., Kimura, 1974]. From the structural complexity of the older parts of the Shimanto my own preference is for the former interpretation ( Figure 2).…”

Section: Shimanto Beltmentioning

confidence: 99%

Subduction tectonics in Japan

Dickinson

1977

EoS Transactions

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Surely, one of the real lessons to be learned from plate tectonics is that every major problem of historical geology must be treated in a global context. My personal horizons were markedly expanded by my experiences last summer, when I examined rock associations formed by subduction in Japan, a Neogene island arc. Cretaceous and Paleogene assemblages are similar to those in the California Coast Ranges. Lower Mesozoic and upper Paleozoic eugeosynclinal terranes in Japan and western North America are accreted oceanic facies that probably formed side by side within a vast Paleopacific Ocean.

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Two Types of Accretionary Fold Belts in Central Japan

Ogawa¹,

Horiuchi²

1979

Geodynamics of the Western Pacific

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The Ancient Continental Margin of Japan

Cited by 17 publications

References 18 publications

Sedimentary Evolution of the Japan Fore-Arc Region off Northern Honshu, Legs 56 and 57, Deep Sea Drilling Project

Sedimentary Evolution of the Japan Fore-Arc Region off Northern Honshu, Legs 56 and 57, Deep Sea Drilling Project

Subduction tectonics in Japan

Two Types of Accretionary Fold Belts in Central Japan

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