By Masao Nakanishi (auth.), Yujiro Ogawa, Ryo Anma, Yildirim Dilek (eds.)
Accretionary prisms in convergent margins are typical laboratories for exploring preliminary orogenic procedures and mountain construction episodes. also they are an immense section of continental development either vertically and laterally. Accretionary prisms are seismically hugely lively and their inner deformation through megathrusting and out-of-sequence faulting are an important difficulty 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 tasks of the sea Drilling application (and lately IODP) over the last 15 years. greater figuring out 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 circulate 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 vital in analyzing the evolution of old advanced sedimentary terrains and orogenic belts by way of subduction-related techniques.
This publication is a set of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological good points of contemporary accretionay prisms and ditchs within the northwestern Pacific Ocean, in line with many submersible dive cruises, ODP drilling initiatives, and geophysical surveys over the past 10 years. additionally it is a number of papers offering the result of systematic built-in stories of contemporary to historic on-land accretionary prisms compared to glossy analogues. the person chapters are facts and photograph wealthy, delivering a big source of data and data from those severe elements of convergent margins for researchers, school participants, and graduate and undergraduate scholars. As such, the publication could be a massive and distinctive contribution within the wide fields of worldwide tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.
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Extra info for Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin
10. 8 20 M. Nakanishi 144°E 145°E 41°N 41°N ER 40°N 40°N 39°N 39°N 38°N 38°N 144°E 145°E Fig. 12 Distribution of bending-related topographic structures in the northern Japan Trench. 3 Izu-Ogasawara Trench The Izu-Ogasawara Trench physiographically terminates at the subducting Daiichi-Kashima Seamount. The northernmost portion of the Izu-Ogasawara Trench forms the trench-trench-trench triple junction with Sagami Trough. 13 Shaded bathymetric map of the southern Japan Trench. 14. 7 the triple junction, Mogi Fan, is very flat.
Geophys Res Lett 19:693–696 Nakanishi M, Sayanagi K, Tamaki K (1993) Magnetic anomalies near the Kuril Trench. In: Kobayashi K (ed) Preliminary report of the Hakuho Maru cruise KH-92-3. Ocean Research Institute, the University of Tokyo, Tokyo, pp 53–55 Nakanishi M, Sager WW, Klaus A (1999) Magnetic lineations within Shatsky Rise, northwest Pacific Ocean: implications for hot spot-triple junction interaction and oceanic plateau formation. J Geophys Res 104:7539–7556 Nakanishi M, Fujiwara T, Obi A (2004) Magnetic anomalies, In: Hirano N (ed) KR04-08 Cruise: R/V KAIREI onboard report.
Asymmetric or half grabens are also observed. 18). The strike is the same as that of trench axis between 33°N and 33°30¢N. There are bending-related topographic structures with an N-S strike around the Mogi Seamount. The bending-related topographic structures with an N-S Bending-Related Topographic Structures of the Subducting Pacific Plate 27 strike are not so much as those with an NNW-SSE strike. 18). There are rarely escarpments or ridges east of the PF escarpment. The bending-related topographic structure near the trench axis south of 33°35¢N is a ridge about 50 km long.