W Syoyo
Latitude: 22.509οN Longitude: 142.533οE Summit: 1750 m bsl
West Syoyo hydrothermal vent is located in a caldera in an active Mariana submarine volcano (Baker et al., 2008). W. Syoyo volcano lies in the rear arc of the Northern Seamount Province (Bloomer et al., 1989). No vent has been found but Resing et al. (2009, Table 4) report evidence of low levels of hydrothermal activity based on Light Scatter and Oxidation Reduction Potential (ORP) measurements using CTD rosette package. The plume is seen in elevated Mn and 3He, for discrete water samples collected above the volcano (Resing et al., 2009). Because the vent has not yet been found, there is no information about biological community.
Table 1: Operations history for W Syoyo vent
| Ship/ Platform | Operation | Year | References |
| TN-153 R/V T. G. Thompson | EM 300 multibeam; CTD tow-yo; ORP | 2003 February – March | Submarine Ring of Fire 2003 |
Table 2: Vent activity and host rocks
| Activity and Host Rocks | References | |
| Activity | Active | Baker et al., 2008; Resing et al., 2009 |
| Host Rocks | Mafic/Intermediate volcanic | Bloomer et al., 1989 |
Table 3: Plume Characteristics
| Plume Anomalies | References | |
| Composition | Small Mn and 3He | Resing et al., 2009 |
| Particulate Fe (nmol/kg) | 3.6 | Resing et al., 2009 |
| TDMn (nM) | 0.9 | Resing et al., 2009 |
| Δ3He (fM) | 2.8 | Resing et al., 2009 |
* Δ3He – Measured above the background.
Vent Biology: None known
Images: None known
Video Links: None known
References:
- Baker, E. T., Embley, R. W., Walker, S. L., Resing, J. A., Lupton, J. E., Nakamura, K., de Ronde, C. E. J., Massoth, G. J., 2008. Hydrothermal activity and volcano distribution along the Mariana arc: Journal of Geophysical Research 113 (B8), 1-16.
- Bloomer, S. H., Stern, R. J., Fisk, E., Geschwind, C. H., 1989. Shoshonitic Volcanism in the Northern Mariana Arc. 1. Mineralogic and Major and Trace Element Characteristics. Journal of Geophysical Research 94 (B4), 4469-4496.
- Resing, J. A., Baker, E. T., Lupton, J. E., Walker, S. L., Butterfield, D. A., Massoth, G. J., Nakamura, K., 2009. Chemistry of hydrothermal plumes above submarine volcanoes of the Mariana Arc. Geochemistry, Geophysics, Geosystems 10 (2), 1-23.
Website References:
- Submarine Ring of Fire 2003 cruise report http://oceanexplorer.noaa.gov/explorations/03fire/logs/summary/marianas_cruisereport.pdf (accessed 03/02/2015)