This page is the home for data, figures, references that are relevant to the Subduction Factory Initiative and the IZU Bonin-Marian focus area. If you have questions, suggestions, or if you want to submit data, please contact Andreas Aichinger at the MARGINS Office, who will be happy to try to help you.

You can download geochemical data for active volcanoes of the Izu-Bonin arc (Excel98 spreadsheet). You need to download the link to your harddisk (do not just click on the link since that will display the source on your browser window).
They are taken from: Tables 1 and 2 in:
Taylor, R.N. and Nesbitt, R.W., 1998. Isotopic characteristics of subduction fluids in an intra-oceanic setting, Izu-Bonin Arc, Japan. Earth Planet. Sci. Lett. 164: 79-98.

You can also download geochemical data for marine sediments seaward of the Mariana and Izu trenches (Excel 98 spreadsheets). You need to download the link to your harddisk (do not just click on the link since that will display the source on your browser window).
Table A5: Geochemical Analyses of Site 801 Sediments (Marianas)
Table 1: Average sedimentary lithologies (including Site 801)
Table 2: Average Sedimentary Columns, by Trench (including Izu and Marianas)
All three tables from:
Plank, T. and Langmuir, C.H. (1998) The chemical composition of subducting sediment: implications for the crust and mantle. Chemical Geology, 145: 325-394.

There is also a geochemical data table for volcanic rocks from the Mariana arc available for download. The table is from Elliot et. al.

P-wave velocity structure of a typical intra-oceanic arc, measured by detailed OBS studies across the IBM arc at 32° 15' N. Contours represent lines of constant velocity (C.I. = 0.1 km/s; drawn thicker at 0.5 km/s intervals). Velocity structure is color-coded (after Suyehiro et al., 1996). See Fig. below for approximate location.

Locality map for the Izu-Bonin-Mariana arc system. The IBM arc system shows tremendous variations in tectonic style and morphologic expression, from collision with Japan in the north to the greatest deep in the world, the Challenger Deep, in the south. The Mariana Trough is an actively spreading back-arc basin and the Mariana forearc contains the only sites of active serpentine diapirism and fluid egress through a forearc. The detailed crustal section shown in Fig. above is from the northern part of this arc system.

Map of earthquakes with epicenters of the Izu-Bonin-Mariana arc system.

Last updated August 11, 2000