Serpentine Seamounts in the Mariana Forearc: Shallow Material Releases from Downgoing Plates
This activity was selected for the On the Cutting Edge Reviewed Teaching Collection
This activity has received positive reviews in a peer review process involving five review categories. The five categories included in the process are
- Scientific Accuracy
- Alignment of Learning Goals, Activities, and Assessments
- Pedagogic Effectiveness
- Robustness (usability and dependability of all components)
- Completeness of the ActivitySheet web page
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This activity has gone through a workshop review process.
This resource was reviewed as part of the May 2009 MARGINS Mini-Lesson Workshop. Each activity received verbal feedback from two participants who had reviewed the activity and activity sheet using these guidelines. Authors revised the activities and activity sheets in response to these comments during the workshop.
This page first made public: Oct 16, 2008
This is a resource of published images and diagrams, and GeoMapApp/Google Earth captures of geophysical survey results for use in describing the unique phenomenon of active serpentinite mud volcanism observed in the shallow forearc region of the Mariana subduction system. Students should be familiar with the concept of subduction and one of its primary petrologic implications - that materials (specifically sediments, ocean crust, and H2O-rich fluids) long residing at the Earth's surface are transported down deep sea trenches, with the release of bound fluids (and fluid-soluble chemical species from the downgoing plate) occurring progressively with increasing depth. These materials are intended to be used as aids in lecture or discussions of this phenomenon in the context of instruction on the process of subduction.t
This resource is intended to be used in a lecture/demonstration setting, as setup materials for more involved exercises examining material fluxes through subduction systems and/or the physical and tectonic implications of the development of mantle serpentinites.
Context for Use
Description and Teaching Materials
Linked PDF file of Mariana forearc seamount pictures and data (Acrobat (PDF) 122.9MB May28 09)
Instructor's notes (Microsoft Word 33kB May28 09)
Teaching Notes and Tips
References and Resources
Oakley, A.J.; Taylor, B.; Fryer, P.; Moore, G.F.; Goodliffe, A M; Morgan, J.K., 2007, Emplacement, growth, and gravitational deformation of serpentinite seamounts on the Mariana forearc. Geophysical Journal International, vol. 170, no. 2, pp.615-634.
Fryer, Patricia B; Salisbury, Matthew H. (2006) Leg 195 synthesis; Site 1200; serpentinite seamounts of the Izu-Bonin/Mariana convergent plate margin, ODP Leg 125 and 195 drilling results. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), vol. 195, 30 pp.
Savov, I.P., Ryan, J.G., D'Antonio, M. and P. Fryer, 2007, Petrology and geochemistry of serpentinized peridotites from Mariana Forearc, South Chamorro Seamount, ODP Leg 195: Implications for the elemental recycling across and along the Mariana arc-basin system. Journal of Geophysical Research, v. 112, doi:10.1029/2006JB004749