Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin [electronic resource] /
Ogawa, Yujiro.editor.
Anma, Ryo.editor.
Dilek, Yildirim.editor.
Accretionary prisms in convergent margins are natural laboratories for exploring initial orogenic processes and mountain building episodes.  They are also an important component of continental growth both vertically and laterally. Accretionary prisms are seismically highly active and their internal deformation via megathrusting and out-of-sequence faulting are a big concern for earthquake and tsunami damage in many coastal cities around the Pacific Rim. The geometries and structures of modern accretionary prisms have been well imaged seismically and through deep drilling projects of the Ocean Drilling Program (and recently IODP) during the last 15 years. Better understanding of the spatial distribution and temporal progression of accretionary prism deformation, structural and hydrologic evolution of the décollement zone (tectonic interface between the subducting slab and the upper plate), chemical gradients and fluid flow paths within accretionary prisms, contrasting stratigraphic and deformational framework along-strike in accretionary prisms, and the distribution and ecosystems of biological communities in accretionary prism settings is most important in interpreting the evolution of ancient complex sedimentary terrains and orogenic belts in terms of subduction-related processes.  This book is a collection of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological features of modern accretionay prisms and trenches in the northwestern Pacific Ocean, based on many submersible dive cruises, ODP drilling projects, and geophysical surveys during the last 10 years. It also includes several papers presenting the results of systematic integrated studies of recent to ancient on-land accretionary prisms in comparison to modern analogues.  The individual chapters are data and image rich, providing a major resource of information and knowledge from these critical components of convergent margins for researchers, faculty members, and graduate and undergraduate students.  As such, the book will be a major and unique contribution in the broad fields of global tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.   .
Description based upon print version of record.
Accretionary Prisms and Convergent Margin Tectonics in the Northwest Pacific Basin; Preface; Acknowledgements; Contents; Contributors; Bending-Related Topographic Structures of the Subducting Plate in the Northwestern Pacific Ocean; 1 Introduction; 2 Data and Methods; 2.1 Bathymetric Data; 2.2 Geomagnetic Data; 3 Results; 3.1 Overview of the Bathymetric Features; 3.2 Topographic Expression of the Trenches; 3.3 Bending-Related Structures of the Oceanward Trench Slopes; 3.3.1 Kuril Trench; 3.3.2 Japan Trench; 3.3.3 Izu-Ogasawara Trench; 3.4 Magnetic Anomalies; 4 Discussion
4.1 Strike of Bending-Related Topographic Structures4.2 Topographic Expression of Bending-Related Structures; 5 Conclusions; References; Erosional Subduction Zonein the Northern Japan Trench: Review of Submersible Dive Reports; 1 Introduction; 2 Oceanward Slope Topography and Geology off Miyako; 3 Landward Slope Topography and Geology off Miyako; 4 Lineaments of the Oceanward and Landward Slopes off Miyako; 5 Conclusions; References; Boso TTT-Type Triple Junction: Formation of Miocene to Quaternary Accretionary Prisms and Present-Day Gravitational Collapse; 1 Introduction
2 Review of Sedimentation, Topography, and Plate Configuration2.1 Sedimentation; 2.2 Topographic Development of the Area from the Eastern Margin of the Sagami Trough to the Boso Triple Junction; 2.3 Katsuura Basin and Mogi Submarine Fan in the Bando Deepsea Basin; 2.4 Review of 3D Structure Based on Multichannel Seismic Profiles and Multibeam Echosounder Data; 2.5 Relationship Between the Tectonic and Age Data; 3 Diatom Analysis; 3.1 Materials, Method, and Results; 3.2 Diatom Biostratigraphy; 3.2.1 Pleistocene to Holocene Samples; 3.2.2 Middle Miocene Sample; 3.3 Summary of Age of Samples
3.4 Correlation to the Marine Rocks of the Izu Forearc4 Tectonic Synthesis: Summary and Conclusion; References; Rifting Structure of Central Izu-Ogasawara (Bonin) Arc Crust: Results of Seismic Crustal Imaging; 1 Introduction; 2 Data Acquisition; 3 Data and Modeling Procedure; 4 Description of Velocity Images; 4.1 Line IBr9; 4.2 Line IBr10; 5 Discussion; 5.1 Structural Commonalities and Differences; 5.2 Origin of the Arc Crust; 5.3 History of the Rifted Crust; 5.4 Reason for the Thin Crust in the Central Izu-Ogasawara Arc; 6 Conclusion; References
Seafloor Geology of the Basement Serpentinite Body in the Ohmachi Seamount (Izu-Bonin Arc) as Exhumed Parts of a Subduction Zone Within the Philippine Sea1 Introduction; 2 Geologic Setting and Bathymetry; 3 Lithology; 3.1 Serpentinites; 3.1.1 Massive Serpentinite; 3.1.2 Schistose Serpentinite; 3.2 Amphibole Schist; 3.3 Paleogene Volcanic Rocks; 3.4 Miocene Turbidite; 3.5 Soft Mud Beds; 4 Dive and Dredge Results; 4.1 Dive 6K#341; 4.2 Dive 6K#570; 4.3 Dive 6K#571; 4.4 Dive 6K#575; 4.5 Dive 6K#608; 4.6 Dive 6K#609; 4.7 Dive 6K#610; 4.8 Dive 6K#1064; 4.9 Dive 6K#1065; 4.10 Dive 6K#1066
4.11 Dive 6K#1067
Includes bibliographical references and index.
Accretionary prisms in convergent margins are natural laboratories for exploring initial orogenic processes and mountain building episodes.  They are also an important component of continental growth both vertically and laterally. Accretionary prisms are seismically highly active and their internal deformation via megathrusting and out-of-sequence faulting are a big concern for earthquake and tsunami damage in many coastal cities around the Pacific Rim. The geometries and structures of modern accretionary prisms have been well imaged seismically and through deep drilling projects of the Ocean Drilling Program (and recently IODP) during the last 15 years. Better understanding of the spatial distribution and temporal progression of accretionary prism deformation, structural and hydrologic evolution of the décollement zone (tectonic interface between the subducting slab and the upper plate), chemical gradients and fluid flow paths within accretionary prisms, contrasting stratigraphic and deformational framework along-strike in accretionary prisms, and the distribution and ecosystems of biological communities in accretionary prism settings is most important in interpreting the evolution of ancient complex sedimentary terrains and orogenic belts in terms of subduction-related processes.  This book is a collection of interdisciplinary papers documenting the geological, geophysical, geochemical, and paleontological features of modern accretionay prisms and trenches in the northwestern Pacific Ocean, based on many submersible dive cruises, ODP drilling projects, and geophysical surveys during the last 10 years. It also includes several papers presenting the results of systematic integrated studies of recent to ancient on-land accretionary prisms in comparison to modern analogues.  The individual chapters are data and image rich, providing a major resource of information and knowledge from these critical components of convergent margins for researchers, faculty members, and graduate and undergraduate students.  As such, the book will be a major and unique contribution in the broad fields of global tectonics, geodynamics, marine geology and geophysics, and structural geology and sedimentology.   .
Geology.
Structural geology.
Sedimentology.
Geophysics.
Oceanography.
Geology.
Structural Geology.
Sedimentology.
Geophysics/Geodesy.
Oceanography.