Subduction tectonics in Japan

Dickinson, William R.

doi:10.1029/eo058i010p00948

Cited by 16 publications

(6 citation statements)

References 2 publications

(2 reference statements)

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“…Intricately disrupted domains derived entirely from seafl oor or turbidite sedimentary successions, without admixture of igneous or blueschist blocks, are termed broken formation (Hsü, 1968), but could equally well be described as chert-argillite or graywacke-argillite mélange (Cowan, 1974). Both mélange and broken formation display the same characteristic phacoidal or lentiform fabric of internal dislocation from outcrop scale to map scale (Dickinson, 1977). The characteristic fabric is well illustrated by outcrop photographs from multiple worldwide settings (Moore and Wheeler, 1978;Moore and Karig, 1980;Cowan, 1982;Nelson, 1982;Bell, 1987;Barnes and Korsch, 1991;Ujiie et al, 2000;Onishi et al, 2001;Fukui and Kano, 2007).…”

Section: Mélange Originmentioning

confidence: 97%

Accretionary Mesozoic–Cenozoic expansion of the Cordilleran continental margin in California and adjacent Oregon

2008

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The Mesozoic-Cenozoic Cordilleran orogen of California includes multiple accretionary belts incorporated sequentially into the continental margin since Middle Triassic time. Accreted tectonic elements include subduction complexes assembled along the Cordilleran margin, intraoceanic island arcs attached to the continental margin by Jurassic arc-continent collision, and subduction complexes associated with the fl anks of the exotic island arcs. Systematic analysis of areal relations and geochronological data displayed on subregional geologic maps and summary chronostratigraphic diagrams allows the punctuated but quasi-continuous pattern of tectonic accretion to be discerned. Stitching plutons and sedimentary overlap successions constrain the times that successive accretionary belts were juxtaposed and amalgamated into the edge of the continental block. In the Klamath Mountains and Sierra Nevada, a continental-margin magmatic arc of Triassic-Jurassic age includes volcanic and plutonic components built upon and intruded into deformed Paleozoic assemblages that were accreted to the Laurentian margin before Middle Triassic time. The native arc assemblage is separated from intraoceanic Triassic-Jurassic arc assemblages exposed farther west by a compound suture belt of mélange and broken formation derived from the remnant ocean basin that separated the east-facing intraoceanic arc system from the Cordilleran margin. Polarity reversal after Middle to Late Jurassic arc-continent collision was followed by accretion of a disrupted ophiolitic belt forming mafi c basement in the subsurface of the Great Valley forearc basin. Subsequent forearc sedimentation accompanied the assembly of multiple belts of mélange and broken formation that form the Mesozoic-Cenozoic Franciscan subduction complex of the California Coast Ranges.Franciscan subduction was largely coeval with intrusion of the dominantly Cretaceous Sierra Nevada batholith into the roots of the Cordilleran magmatic arc, but Franciscan accretion was just a late phase of continuing tectonic expansion that spanned more than 200 m.y. along the California continental margin.

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Section: Mélange Originmentioning

confidence: 97%

Accretionary Mesozoic–Cenozoic expansion of the Cordilleran continental margin in California and adjacent Oregon

2008

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“…A general overview of the Nipponides shows an original younging of tectonic units towards the Pacific Ocean, despite the fact that this simple pattern is now disrupted in many places by extensive Mesozoic-Cenozoic, mainly left-lateral strike-slip faulting. In some segments, though, as in southwestern Japan for example, this original Pacificopetal zoning is still preserved (Kobayashi 1941, Matsuda & Uyeda 1971, Dickinson 1977. Ş engör & Natal'in (1996) divided the Nipponides into four sectors.…”

Section: Tectonic Evolutionmentioning

confidence: 99%

Turkic-Type Orogeny and Its Role in the Making of the Continental Crust

Şengör

Natal’in

1996

Annu. Rev. Earth Planet. Sci.

597

237

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“…During this field trip we went from a pre-Permian continental nucleus (the Hida nucleus, resembling the Sino-Korean platform in its geology) through Permo-Triassic, Jurassic and late Cretaceous-Cainozoic subduction-accretion complex dominated by steeply foliated deep sea sedimentary rocks (chert and mudstones), pelites and psammites, subordinate limestones and dolomites, and volcanic rocks of oceanic affinity 'greenstones'(Figs. 14,15;Dickinson 1977; 88 A. M. C. Sengur A Overlapping of the inner and outer belts (portion indicated as 0-I), as magmatic front migrates oceanward from stage A to stage B in Japan(from Matsuda & Uyeda 1971). This model portrays a situation which is the opposite of Dickinson's model for the arc retreat and is the situation encountered in the central Asian Turkic-type orogens.…”

mentioning

confidence: 99%

The Palaeo‐Tethyan suture: A line of demarcation between two fundamentally different architectural styles in the structure of Asia

Şengör

1992

Island Arc

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The Palaeo-Tethyan suture separates regions characterized by two fundamentally different tectonic styles in the structure of the Tethysides. North of the suture in Iranparts of the Russian Federation and China, orogenic development is characterized by very large subduction-accretion complexes developed since the late Proterozoic. Magmatic arc axes migrated radially outwards from the 'Old Vertex of Eurasia' and consolidated the accretionary prisms into a 'basement complex' dominated by a pelitic composition.In such orogens, called the 'Turkic-type' after the dominant ethnic population of Central Asia, ophiolites are unreliable indicators of sutures, because they are present throughout the 'basement' as in-faulted shreds and rarely as nappes. By contrast, south of the Palaeo-Tethyan suture, orogeny was commonly characterized by a Sumatra-or Andean-type continental margin arc (e.g. the Transhimalaya arc) that in places became an island arc by back-arc basin rifting (e.g. the Black Sea behind the Rhodope-Pontide fragment) and later collided with an Atlantic-(as in the Himalaya) or California-type (as in the Alps) continental margin to create Alpine-or Himalayan-type orogenic belts. Turkic-type orogenic belts result from the exaggeration of the Himalayan-type as a result of the subduction of very large oceanic areas that contain great amounts of sediment. They contribute to the enlargement and also possibly the growth of the continental crust which has a composition more silicic than basalt. The Palaeo-Tethyan suture is thus a line across which the rate of continental enlargement by subduction-accretion changed dramaticallv.

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Subduction tectonics in Japan

Cited by 16 publications

References 2 publications

Accretionary Mesozoic–Cenozoic expansion of the Cordilleran continental margin in California and adjacent Oregon

Accretionary Mesozoic–Cenozoic expansion of the Cordilleran continental margin in California and adjacent Oregon

Turkic-Type Orogeny and Its Role in the Making of the Continental Crust

The Palaeo‐Tethyan suture: A line of demarcation between two fundamentally different architectural styles in the structure of Asia

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