Sediment deformation and fluid activity in the Nankai, Izu-Bonin and Japan forearc slopes and trenches

Author(s): Taira, A.; Pickering, K. T.
Author Affiliation(s): Primary:
Univ. Tokyo, Ocean Res. Inst., Tokyo, Japan
Univ. Leeds, United Kingdom
Univ. Leicester, United Kingdom
Volume Title: Behaviour and influence of fluids in subduction zones
Volume Author(s): Tarney, J., editor; Pickering, K. T.; Knipe, R. J.; Dewey, John F.
Source: Philosophical Transactions of the Royal Society of London, Series A: Mathematical and Physical Sciences, 335(1638), p.289-313; The behaviour and influence of fluids in subduction zones, London, United Kingdom, Nov. 8-9, 1990, edited by J. Tarney, K. T. Pickering, R. J. Knipe and John F. Dewey. Publisher: Royal Society of London, London, United Kingdom. ISSN: 0080-4614 CODEN: PTRMAD
Note: In English. 91 refs.; illus. incl. sects., strat. col., sketch maps
Summary: The Nankai fore-arc represents a typical clastic-dominated accretionary prism where the expulsion of pore fluids from sediments seems to have occurred intermittently, through both channelized and diffusive mechanisms, some of which appear to be pulsed. The widespread development of a gas-hydrate phase boundary may indicate pervasive fluid advection throughout the prism. The Japan Trench fore-arc is characterized by tectonogravity slope instability and collapse, resulting in zones of fluid escape along normal faults. The Izu-Bonin fore-arc contains serpentinite diapirs with blocks of basic-ultrabasic rocks and blueschist which permit migration of deep-seated fluids. The contrasting tectonic processes in these three fore-arcs thus may be explained by differences in their plumbing systems and hydrogeological characteristics of the fore-arc basements.
Year of Publication: 1991
Research Program: ODP Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Accretionary wedges; Basins; Compaction; Fluid phase; Fore-arc basins; Izu-Bonin Arc; Japan Trench; Leg 110; Leg 125; Leg 126; Leg 131; Nankai Trough; North Pacific; Northwest Pacific; Ocean Drilling Program; Pacific Ocean; Plate tectonics; Pore water; Sediments; Subduction; Subduction zones; Tectonophysics; West Pacific
Coordinates: N153133 N153224 W0584207 W0585106
N192955 N304929 E1464146 E1405509
N305457 N322359 E1405317 E1395039
N322105 N322111 E1345646 E1345634
Record ID: 1992066325
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom