By Masao Nakanishi (auth.), Yujiro Ogawa, Ryo Anma, Yildirim Dilek (eds.)
Accretionary prisms in convergent margins are average laboratories for exploring preliminary orogenic strategies and mountain construction episodes. also they are an incredible portion of continental progress either vertically and laterally. Accretionary prisms are seismically hugely energetic and their inner deformation through megathrusting and out-of-sequence faulting are a major obstacle for earthquake and tsunami harm in lots of coastal towns round the Pacific Rim. The geometries and constructions of recent accretionary prisms were good imaged seismically and during deep drilling initiatives of the sea Drilling software (and lately IODP) over the past 15 years. higher realizing of the spatial distribution and temporal development of accretionary prism deformation, structural and hydrologic evolution of the décollement region (tectonic interface among the subducting slab and the higher plate), chemical gradients and fluid circulation paths inside accretionary prisms, contrasting stratigraphic and deformational framework along-strike in accretionary prisms, and the distribution and ecosystems of organic groups in accretionary prism settings is most crucial in reading the evolution of old advanced sedimentary terrains and orogenic belts by way of subduction-related procedures.
This e-book is a suite of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological gains of contemporary accretionay prisms and ditchs within the northwestern Pacific Ocean, in response to many submersible dive cruises, ODP drilling initiatives, and geophysical surveys over the past 10 years. it is also numerous papers featuring the result of systematic built-in reviews of contemporary to historical on-land accretionary prisms compared to glossy analogues. the person chapters are info and snapshot wealthy, offering an enormous source of data and information from those serious elements of convergent margins for researchers, college contributors, and graduate and undergraduate scholars. As such, the publication could be a big and particular contribution within the large fields of worldwide tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.
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Additional info for Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin
Several escarpments with an N-S strike are identified south of the Erimo Seamount at the northern tip of the Japan Trench. 2 Japan Trench The strike of the Japan Trench bounded by Daiichi-Kashima and Erimo seamounts changes at around 38°N from about N08°E in the northern part to ~N30°E in the 16 M. 8 Selected examples of bathymetric profiles nearly perpendicular to the western Kuril Trench. 7. (a) and (c) show the original bathymetric (solid) and filtered (broken) profiles. (b) and (d) show the residual profiles calculated by subtracting filtered values from the original water depths southern part (Fig.
JAMSTEC, Yokosuka Yoneyama K (2008) R/V MIRAI cruise report MR08-02. JAMSTEC, Yokosuka Erosional Subduction Zone in the Northern Japan Trench: Review of Submersible Dive Reports Yujiro Ogawa Abstract Submersible studies of the oceanward and landward slopes of the northern Japan trench are reviewed, and the typical erosional features of this subduction zone are discussed. On the oceanward slope, normal faults with tension cracks have created horst and graben structures, forming a series of steps.
Numerous knolls are situated around 38°N. Hirano et al. (2008) indicated that the knolls are formed by recent volcanism, not related with any plate boundaries. Abyssal hill fabrics exist on the seafloor east of the Kashima Fracture Zone and Joban Seamounts. Between 38°N and 41°N, there are abyssal hill fabrics east of 145°E. However, the fabrics are not resolvable on the outer swell along the Kuril Trench. Most of the abyssal hill fabrics trend N70°E, parallel to that of magnetic anomaly lineations, with heights of less than 100 m.
Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin by Masao Nakanishi (auth.), Yujiro Ogawa, Ryo Anma, Yildirim Dilek (eds.)