Seamounts in the subduction factory

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doi: 10.5670/oceanog.2010.69
Author(s): Staudigel, Hubert; Koppers, Anthony A. P.; Plank, Terry A.; Hanan, Barry B.
Author Affiliation(s): Primary:
Scripps Institution of Oceanography, Institute of Geophysics and Planetary Physics, La Jolla, CA, United States
Other:
Oregon State University, United States
Lamont-Doherty Earth Observatory, United States
San Diego State University, United States
Volume Title: Mountains in the sea
Volume Author(s): Staudigel, Hubert, editor; Koppers, Anthony A. P.; Lavelle, J. William; Pitcher, Tony J.; Shank, Timothy M.
Source: Mountains in the sea, edited by Hubert Staudigel, Anthony A. P. Koppers, J. William Lavelle, Tony J. Pitcher and Timothy M. Shank. Oceanography (Washington D.C.), 23(1), p.176-181. Publisher: Oceanography Society, Rockville, MD, United States. ISSN: 1042-8275
Note: In English. 31 refs.; illus., incl. geol. sketch map
Summary: The "Subduction Factory" is a metaphor for the geochemical processing of subducted oceanic crust and sediment into components that are either incorporated into the volcanic arc or recycled into Earth's mantle. Seamounts may be a significant source of material to the Subduction Factory, in particular, by providing trace elements such as K, Ba, La, Ce, U, Th, Pb, Rb, and Cs. Seamount subduction might also play a role in the global distribution of chemical mantle heterogeneities. Neither one of these effects of seamount subduction is well understood. The Izu-Bonin-Marianas (IBM) volcanic arc is a region where the potential impact of seamount subduction may be explored most effectively. There, sections of the IBM arc and many of the incoming seamounts display unusually high 206Pb/204Pb ratios, which offer a particularly promising geochemical tracer that may help quantify seamount input into the Subduction Factory. Although this process remains to be explored in a quantitative manner, it is apparent that the demise of seamounts in subduction zones offers an exciting research target with important consequences for globally relevant geochemical processes.
Year of Publication: 2010
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 18 Geophysics, Solid-Earth; Alteration; Atlantic Ocean; Bermuda Rise; Chemical ratios; Crust; DSDP Site 417; Deep Sea Drilling Project; Geochemistry; Geodynamics; IPOD; Isotope ratios; Isotopes; Izu-Bonin Arc; Lead; Marine sediments; Metals; North Atlantic; North Pacific; Northwest Pacific; ODP Site 801; Ocean Drilling Program; Ocean floors; Oceanic crust; Pacific Ocean; Pb-206/Pb-204; Pigafetta Basin; Plate tectonics; Radioactive isotopes; Seamounts; Sediments; Sm/Nd; Stable isotopes; Subduction; Subduction zones; Trace elements; Water-rock interaction; West Pacific
Coordinates: N183831 N183835 E1562136 E1562134
N250000 N250000 W0680000 W0680000
Record ID: 2018051637
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.