nhess sumatra and cascadia paper

Here is the latest revision to my paper: Patton et al., 2012

I discuss how the different margin settings led to different sedimentary systems.

Jason R Patton1, Chris Goldfinger1, Ann E. Morey1, Chris Romsos1, Brandi Black1, Yusuf Djadjadihardja2, Udrekh Udrekh2
1. Coll. of Earth, Ocean, and Atm. Sci, Oregon State Unviversity, Corvallis, OR, United States.
2. Bandan Penghajian Dan Penerapan Teknologi (BPPT), Jakarta, Indonesia.

We evaluate turbidite deposition along slope and trench settings for the Cascadia and Sumatra-Andaman subduction zones. Source proximity, basin effects, turbidity current flow path, earthquake rupture patterns, both temporal and spatial, hydrodynamics, and topography all likely play roles in the deposition of the turbidites as evidenced by the vertical structure of the final deposit. Channel systems tend to promote low-frequency components of the content of the current over longer distances, while more proximal slope basins and base-of-slope apron fan settings result in a turbidite structure that is likely influenced by local physiography and other factors. Cascadia’s margin is dominated by glacial cycle constructed pathways which promote turbidity current flows for large distances. Sumatra margin pathways do not inherit these sedimentary systems, so turbidity currents appear more localized.

Category(s): cascadia, geology, humboldt, sumatra

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