Program director in the National Science Foundations Division of Ocean Sciences, which funds IODP, James Allan said: This expedition will yield information thats key to understanding why destructive tsunamis happen after shallow earthquakes at plate subduction zones
and underwater landslides.
are the parts of the Earth where one slab of the crust is slowly sliding under another.
The geometry of faults at subduction zones
- regions of Earth's crust where two tectonic plates meet - plays a key role in determining the intensity of earthquakes, (http://science.
1997: Quantification of Interplate Coupling in Subduction Zones
and Forearc Topography.
Active subduction zones
are some of the most likely plate interfaces to generate quakes of catastrophic magnitude and also pose the greatest risk of triggering tsunamigenic tectonic events," according to Dr.
In an article published this week in the journal Nature Geoscience, Sverjensky and his team demonstrate that in addition to the carbon dioxide and methane already documented deep in subduction zones
, there exists a rich variety of organic carbon species that could spark the formation of diamonds and perhaps even become food for microbial life.
The team's 3D models suggest a likely answer to a question that has long plagued geologists: why do long, curving mountain chains form along some subduction zones
- where two tectonic plates collide, pushing one down into the mantle?
A similar type of clay is present in other subduction zones
in the northwest Pacific, suggesting that they may also be capable of generating huge earthquakes.
So recent earthquakes such as Sumatra 2004 and Japan 2011 have made us re-evaluate the earthquake process at subduction zones
, and the MSZ is certainly one place to look at again," she added.
Slow slip helps scientists balance the books at subduction zones
by explaining where all the motion of the subducting plate goes.
Two subduction zones
were active during late Triassic in this area (Fig 1) we propose a context of slab retreat of the subduction zone
for the majority of high-K calc- alkaline granites.
Most earthquakes of this kind are produced at subduction zones
where an oceanic plate slides beneath another plate, known as the upper plate, and the down-going plate descends into the interior of the Earth as a subducted slab.